./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/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 e24917ef8695200a643e71e238ee3c2cc9fb2120 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:10,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:10,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:10,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:10,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:10,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:10,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:10,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:10,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:10,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:10,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:10,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:10,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:10,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:10,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:10,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:10,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:10,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:10,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:10,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:10,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:10,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:10,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:10,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:10,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:10,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:10,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:10,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:10,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:10,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:10,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:10,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:10,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:10,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:10,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:10,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:10,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:10,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:10,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:10,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:10,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:10,989 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:01:11,003 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:11,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:11,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:11,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:11,006 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:11,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:11,009 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:01:11,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:11,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:01:11,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:11,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:01:11,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:01:11,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:01:11,010 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:01:11,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:11,010 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:11,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:01:11,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:11,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:11,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:01:11,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:01:11,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:01:11,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:11,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:01:11,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:01:11,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:11,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:01:11,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:01:11,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/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 -> e24917ef8695200a643e71e238ee3c2cc9fb2120 [2019-10-22 09:01:11,048 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:11,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:11,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:11,066 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:11,066 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:11,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2019-10-22 09:01:11,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/data/21e7779fc/76f59b96f34f4d088dabd6a48d05ba4d/FLAG26bacfd94 [2019-10-22 09:01:11,558 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:11,558 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/sv-benchmarks/c/pthread/triangular-longer-1.i [2019-10-22 09:01:11,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/data/21e7779fc/76f59b96f34f4d088dabd6a48d05ba4d/FLAG26bacfd94 [2019-10-22 09:01:11,596 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/data/21e7779fc/76f59b96f34f4d088dabd6a48d05ba4d [2019-10-22 09:01:11,598 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:11,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:11,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:11,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:11,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:11,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:11" (1/1) ... [2019-10-22 09:01:11,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25158c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:11, skipping insertion in model container [2019-10-22 09:01:11,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:11" (1/1) ... [2019-10-22 09:01:11,613 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:11,654 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:11,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:12,003 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:12,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:12,114 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:12,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12 WrapperNode [2019-10-22 09:01:12,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:12,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:12,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:12,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:12,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:12,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:12,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:12,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:12,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... [2019-10-22 09:01:12,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:12,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:12,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:12,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:12,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/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 [2019-10-22 09:01:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-10-22 09:01:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-10-22 09:01:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-10-22 09:01:12,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-10-22 09:01:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 09:01:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-10-22 09:01:12,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:01:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:01:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-10-22 09:01:12,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:12,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:12,231 WARN L202 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-10-22 09:01:12,512 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:12,512 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-22 09:01:12,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:12 BoogieIcfgContainer [2019-10-22 09:01:12,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:12,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:01:12,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:01:12,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:01:12,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:01:11" (1/3) ... [2019-10-22 09:01:12,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232d404a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:12, skipping insertion in model container [2019-10-22 09:01:12,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:12" (2/3) ... [2019-10-22 09:01:12,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232d404a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:01:12, skipping insertion in model container [2019-10-22 09:01:12,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:12" (3/3) ... [2019-10-22 09:01:12,519 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-10-22 09:01:12,548 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,549 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,549 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,549 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,549 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,549 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,550 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,554 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,554 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,554 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,554 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,555 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,555 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,555 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,555 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,556 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,556 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,556 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,556 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,556 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,556 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,557 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,559 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,559 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,559 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,560 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,560 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,561 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:01:12,571 WARN L141 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-10-22 09:01:12,572 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:01:12,578 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:01:12,590 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:01:12,604 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:01:12,604 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:01:12,604 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:01:12,604 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:12,604 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:12,605 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:01:12,605 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:12,605 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:01:12,612 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 48 transitions [2019-10-22 09:01:12,679 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2019-10-22 09:01:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2019-10-22 09:01:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:01:12,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:12,691 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:12,696 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1918718107, now seen corresponding path program 1 times [2019-10-22 09:01:12,709 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:12,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388737393] [2019-10-22 09:01:12,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:12,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388737393] [2019-10-22 09:01:13,006 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:13,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:01:13,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949027750] [2019-10-22 09:01:13,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:13,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:13,026 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2019-10-22 09:01:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:13,180 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2019-10-22 09:01:13,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:13,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-22 09:01:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:13,205 INFO L225 Difference]: With dead ends: 1777 [2019-10-22 09:01:13,209 INFO L226 Difference]: Without dead ends: 499 [2019-10-22 09:01:13,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:01:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-10-22 09:01:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2019-10-22 09:01:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2019-10-22 09:01:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2019-10-22 09:01:13,302 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2019-10-22 09:01:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:13,302 INFO L462 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2019-10-22 09:01:13,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2019-10-22 09:01:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:01:13,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:13,305 INFO L380 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] [2019-10-22 09:01:13,305 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash 160945497, now seen corresponding path program 1 times [2019-10-22 09:01:13,306 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:13,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532824540] [2019-10-22 09:01:13,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532824540] [2019-10-22 09:01:13,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:13,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:01:13,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039703038] [2019-10-22 09:01:13,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:13,469 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:13,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:13,470 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2019-10-22 09:01:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:13,587 INFO L93 Difference]: Finished difference Result 562 states and 1391 transitions. [2019-10-22 09:01:13,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:01:13,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-22 09:01:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:13,592 INFO L225 Difference]: With dead ends: 562 [2019-10-22 09:01:13,592 INFO L226 Difference]: Without dead ends: 353 [2019-10-22 09:01:13,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-10-22 09:01:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2019-10-22 09:01:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-10-22 09:01:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 882 transitions. [2019-10-22 09:01:13,624 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 882 transitions. Word has length 22 [2019-10-22 09:01:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:13,625 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 882 transitions. [2019-10-22 09:01:13,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 882 transitions. [2019-10-22 09:01:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:01:13,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:13,626 INFO L380 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] [2019-10-22 09:01:13,626 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash -509840719, now seen corresponding path program 1 times [2019-10-22 09:01:13,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:13,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081376835] [2019-10-22 09:01:13,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081376835] [2019-10-22 09:01:13,732 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:13,733 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:01:13,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387236536] [2019-10-22 09:01:13,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:01:13,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:13,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:01:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:01:13,734 INFO L87 Difference]: Start difference. First operand 353 states and 882 transitions. Second operand 5 states. [2019-10-22 09:01:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:13,770 INFO L93 Difference]: Finished difference Result 430 states and 1036 transitions. [2019-10-22 09:01:13,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:01:13,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-22 09:01:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:13,772 INFO L225 Difference]: With dead ends: 430 [2019-10-22 09:01:13,772 INFO L226 Difference]: Without dead ends: 300 [2019-10-22 09:01:13,772 INFO L600 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 [2019-10-22 09:01:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-10-22 09:01:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2019-10-22 09:01:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2019-10-22 09:01:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2019-10-22 09:01:13,786 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 22 [2019-10-22 09:01:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:13,786 INFO L462 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2019-10-22 09:01:13,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:01:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2019-10-22 09:01:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 09:01:13,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:13,787 INFO L380 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] [2019-10-22 09:01:13,788 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1011235803, now seen corresponding path program 1 times [2019-10-22 09:01:13,788 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:13,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83039357] [2019-10-22 09:01:13,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:13,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:13,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83039357] [2019-10-22 09:01:13,884 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:01:13,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 09:01:13,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943356538] [2019-10-22 09:01:13,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:01:13,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:13,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:01:13,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:01:13,886 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand 6 states. [2019-10-22 09:01:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:14,012 INFO L93 Difference]: Finished difference Result 545 states and 1322 transitions. [2019-10-22 09:01:14,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:01:14,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-22 09:01:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:14,014 INFO L225 Difference]: With dead ends: 545 [2019-10-22 09:01:14,014 INFO L226 Difference]: Without dead ends: 335 [2019-10-22 09:01:14,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2019-10-22 09:01:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2019-10-22 09:01:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2019-10-22 09:01:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2019-10-22 09:01:14,025 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 25 [2019-10-22 09:01:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:14,026 INFO L462 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2019-10-22 09:01:14,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:01:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2019-10-22 09:01:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 09:01:14,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:14,027 INFO L380 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] [2019-10-22 09:01:14,027 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1553903636, now seen corresponding path program 1 times [2019-10-22 09:01:14,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:14,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665909603] [2019-10-22 09:01:14,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665909603] [2019-10-22 09:01:14,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095099809] [2019-10-22 09:01:14,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:01:14,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:14,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:14,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,310 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:14,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-22 09:01:14,310 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481299572] [2019-10-22 09:01:14,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:01:14,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:14,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:01:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:01:14,315 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2019-10-22 09:01:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:14,437 INFO L93 Difference]: Finished difference Result 608 states and 1448 transitions. [2019-10-22 09:01:14,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:01:14,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-10-22 09:01:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:14,440 INFO L225 Difference]: With dead ends: 608 [2019-10-22 09:01:14,440 INFO L226 Difference]: Without dead ends: 419 [2019-10-22 09:01:14,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-10-22 09:01:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 379. [2019-10-22 09:01:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2019-10-22 09:01:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 896 transitions. [2019-10-22 09:01:14,461 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 896 transitions. Word has length 29 [2019-10-22 09:01:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:14,462 INFO L462 AbstractCegarLoop]: Abstraction has 379 states and 896 transitions. [2019-10-22 09:01:14,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:01:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 896 transitions. [2019-10-22 09:01:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 09:01:14,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:14,463 INFO L380 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] [2019-10-22 09:01:14,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:14,666 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1611267919, now seen corresponding path program 1 times [2019-10-22 09:01:14,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:14,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630618286] [2019-10-22 09:01:14,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:14,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630618286] [2019-10-22 09:01:14,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620398305] [2019-10-22 09:01:14,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:14,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:14,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:14,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:14,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:14,891 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:14,891 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-22 09:01:14,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325601520] [2019-10-22 09:01:14,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:14,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:14,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:14,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:14,892 INFO L87 Difference]: Start difference. First operand 379 states and 896 transitions. Second operand 9 states. [2019-10-22 09:01:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:15,040 INFO L93 Difference]: Finished difference Result 652 states and 1536 transitions. [2019-10-22 09:01:15,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:01:15,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2019-10-22 09:01:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:15,042 INFO L225 Difference]: With dead ends: 652 [2019-10-22 09:01:15,043 INFO L226 Difference]: Without dead ends: 463 [2019-10-22 09:01:15,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:15,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-10-22 09:01:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 356. [2019-10-22 09:01:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2019-10-22 09:01:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 846 transitions. [2019-10-22 09:01:15,055 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 846 transitions. Word has length 33 [2019-10-22 09:01:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:15,056 INFO L462 AbstractCegarLoop]: Abstraction has 356 states and 846 transitions. [2019-10-22 09:01:15,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 846 transitions. [2019-10-22 09:01:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 09:01:15,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:15,057 INFO L380 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] [2019-10-22 09:01:15,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:15,258 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:15,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1927296628, now seen corresponding path program 2 times [2019-10-22 09:01:15,259 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:15,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497702473] [2019-10-22 09:01:15,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:15,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:15,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:15,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497702473] [2019-10-22 09:01:15,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161569673] [2019-10-22 09:01:15,366 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:15,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:15,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:15,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:15,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:15,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:15,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:15,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:15,449 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:15,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-22 09:01:15,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484710952] [2019-10-22 09:01:15,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:01:15,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:01:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:01:15,451 INFO L87 Difference]: Start difference. First operand 356 states and 846 transitions. Second operand 9 states. [2019-10-22 09:01:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:15,578 INFO L93 Difference]: Finished difference Result 720 states and 1672 transitions. [2019-10-22 09:01:15,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:01:15,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-22 09:01:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:15,580 INFO L225 Difference]: With dead ends: 720 [2019-10-22 09:01:15,580 INFO L226 Difference]: Without dead ends: 519 [2019-10-22 09:01:15,581 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2019-10-22 09:01:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 423. [2019-10-22 09:01:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2019-10-22 09:01:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 980 transitions. [2019-10-22 09:01:15,591 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 980 transitions. Word has length 37 [2019-10-22 09:01:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:15,591 INFO L462 AbstractCegarLoop]: Abstraction has 423 states and 980 transitions. [2019-10-22 09:01:15,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:01:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 980 transitions. [2019-10-22 09:01:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-22 09:01:15,592 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:15,592 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2019-10-22 09:01:15,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:15,794 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1075865071, now seen corresponding path program 3 times [2019-10-22 09:01:15,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:15,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250605699] [2019-10-22 09:01:15,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:15,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:15,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:15,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250605699] [2019-10-22 09:01:15,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441234879] [2019-10-22 09:01:15,890 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:15,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 09:01:15,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:15,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:01:15,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:15,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:15,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:15,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:15,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:15,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-22 09:01:15,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972605147] [2019-10-22 09:01:15,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:01:15,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:15,971 INFO L87 Difference]: Start difference. First operand 423 states and 980 transitions. Second operand 10 states. [2019-10-22 09:01:16,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:16,137 INFO L93 Difference]: Finished difference Result 724 states and 1680 transitions. [2019-10-22 09:01:16,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:16,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-10-22 09:01:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:16,139 INFO L225 Difference]: With dead ends: 724 [2019-10-22 09:01:16,139 INFO L226 Difference]: Without dead ends: 523 [2019-10-22 09:01:16,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2019-10-22 09:01:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 372. [2019-10-22 09:01:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-22 09:01:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 878 transitions. [2019-10-22 09:01:16,151 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 878 transitions. Word has length 41 [2019-10-22 09:01:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:16,151 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 878 transitions. [2019-10-22 09:01:16,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:01:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 878 transitions. [2019-10-22 09:01:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-22 09:01:16,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:16,153 INFO L380 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] [2019-10-22 09:01:16,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:16,354 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1001125521, now seen corresponding path program 4 times [2019-10-22 09:01:16,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:16,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834488090] [2019-10-22 09:01:16,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:16,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:16,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:16,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834488090] [2019-10-22 09:01:16,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576999447] [2019-10-22 09:01:16,476 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:16,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:16,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:16,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:01:16,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:16,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:16,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:16,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:16,569 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:16,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-22 09:01:16,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333828944] [2019-10-22 09:01:16,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:01:16,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:16,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:01:16,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:01:16,570 INFO L87 Difference]: Start difference. First operand 372 states and 878 transitions. Second operand 11 states. [2019-10-22 09:01:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:16,750 INFO L93 Difference]: Finished difference Result 724 states and 1680 transitions. [2019-10-22 09:01:16,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:01:16,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-10-22 09:01:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:16,752 INFO L225 Difference]: With dead ends: 724 [2019-10-22 09:01:16,752 INFO L226 Difference]: Without dead ends: 487 [2019-10-22 09:01:16,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:01:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2019-10-22 09:01:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 459. [2019-10-22 09:01:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2019-10-22 09:01:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1056 transitions. [2019-10-22 09:01:16,764 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1056 transitions. Word has length 41 [2019-10-22 09:01:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:16,764 INFO L462 AbstractCegarLoop]: Abstraction has 459 states and 1056 transitions. [2019-10-22 09:01:16,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:01:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1056 transitions. [2019-10-22 09:01:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 09:01:16,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:16,765 INFO L380 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] [2019-10-22 09:01:16,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:16,966 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1827029934, now seen corresponding path program 5 times [2019-10-22 09:01:16,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:16,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866827829] [2019-10-22 09:01:16,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:16,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:16,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866827829] [2019-10-22 09:01:17,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020256413] [2019-10-22 09:01:17,079 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:17,137 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-22 09:01:17,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:17,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 09:01:17,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:17,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:17,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:17,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,173 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:17,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-22 09:01:17,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438933173] [2019-10-22 09:01:17,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:01:17,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:01:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:17,174 INFO L87 Difference]: Start difference. First operand 459 states and 1056 transitions. Second operand 12 states. [2019-10-22 09:01:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:17,381 INFO L93 Difference]: Finished difference Result 716 states and 1664 transitions. [2019-10-22 09:01:17,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:01:17,382 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-10-22 09:01:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:17,383 INFO L225 Difference]: With dead ends: 716 [2019-10-22 09:01:17,384 INFO L226 Difference]: Without dead ends: 479 [2019-10-22 09:01:17,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2019-10-22 09:01:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 364. [2019-10-22 09:01:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2019-10-22 09:01:17,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2019-10-22 09:01:17,394 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2019-10-22 09:01:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:17,395 INFO L462 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2019-10-22 09:01:17,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:01:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2019-10-22 09:01:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 09:01:17,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:17,397 INFO L380 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] [2019-10-22 09:01:17,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:17,600 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash 234512852, now seen corresponding path program 6 times [2019-10-22 09:01:17,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:17,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668859505] [2019-10-22 09:01:17,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:17,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668859505] [2019-10-22 09:01:17,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015424990] [2019-10-22 09:01:17,715 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:17,770 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-22 09:01:17,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:17,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:01:17,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:17,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:17,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:17,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:17,800 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:17,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-22 09:01:17,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531788375] [2019-10-22 09:01:17,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:01:17,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:01:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:01:17,804 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2019-10-22 09:01:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:18,000 INFO L93 Difference]: Finished difference Result 708 states and 1648 transitions. [2019-10-22 09:01:18,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:01:18,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-10-22 09:01:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:18,003 INFO L225 Difference]: With dead ends: 708 [2019-10-22 09:01:18,003 INFO L226 Difference]: Without dead ends: 495 [2019-10-22 09:01:18,003 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-10-22 09:01:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 377. [2019-10-22 09:01:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2019-10-22 09:01:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 888 transitions. [2019-10-22 09:01:18,016 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 888 transitions. Word has length 45 [2019-10-22 09:01:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:18,016 INFO L462 AbstractCegarLoop]: Abstraction has 377 states and 888 transitions. [2019-10-22 09:01:18,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:01:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 888 transitions. [2019-10-22 09:01:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-22 09:01:18,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:18,017 INFO L380 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] [2019-10-22 09:01:18,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:18,218 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:18,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1356781681, now seen corresponding path program 7 times [2019-10-22 09:01:18,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:18,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764714700] [2019-10-22 09:01:18,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764714700] [2019-10-22 09:01:18,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541712102] [2019-10-22 09:01:18,332 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:18,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:01:18,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:18,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:18,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:18,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-22 09:01:18,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923675421] [2019-10-22 09:01:18,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:01:18,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:01:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:01:18,444 INFO L87 Difference]: Start difference. First operand 377 states and 888 transitions. Second operand 13 states. [2019-10-22 09:01:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:18,637 INFO L93 Difference]: Finished difference Result 740 states and 1712 transitions. [2019-10-22 09:01:18,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:01:18,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-10-22 09:01:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:18,639 INFO L225 Difference]: With dead ends: 740 [2019-10-22 09:01:18,640 INFO L226 Difference]: Without dead ends: 527 [2019-10-22 09:01:18,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:01:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-10-22 09:01:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2019-10-22 09:01:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2019-10-22 09:01:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2019-10-22 09:01:18,648 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 49 [2019-10-22 09:01:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:18,649 INFO L462 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2019-10-22 09:01:18,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:01:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2019-10-22 09:01:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-22 09:01:18,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:18,650 INFO L380 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] [2019-10-22 09:01:18,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:18,850 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:18,851 INFO L82 PathProgramCache]: Analyzing trace with hash -89265484, now seen corresponding path program 8 times [2019-10-22 09:01:18,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:18,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782481712] [2019-10-22 09:01:18,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:18,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:18,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782481712] [2019-10-22 09:01:18,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430202090] [2019-10-22 09:01:18,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:19,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:19,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:19,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:01:19,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:19,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:19,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:19,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:19,042 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:19,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-22 09:01:19,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383557587] [2019-10-22 09:01:19,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:01:19,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:01:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:01:19,043 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2019-10-22 09:01:19,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:19,264 INFO L93 Difference]: Finished difference Result 800 states and 1832 transitions. [2019-10-22 09:01:19,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 09:01:19,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2019-10-22 09:01:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:19,267 INFO L225 Difference]: With dead ends: 800 [2019-10-22 09:01:19,267 INFO L226 Difference]: Without dead ends: 611 [2019-10-22 09:01:19,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:01:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-10-22 09:01:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 571. [2019-10-22 09:01:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2019-10-22 09:01:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1280 transitions. [2019-10-22 09:01:19,278 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1280 transitions. Word has length 53 [2019-10-22 09:01:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:19,278 INFO L462 AbstractCegarLoop]: Abstraction has 571 states and 1280 transitions. [2019-10-22 09:01:19,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:01:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1280 transitions. [2019-10-22 09:01:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-22 09:01:19,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:19,279 INFO L380 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] [2019-10-22 09:01:19,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:19,480 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:19,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1833667503, now seen corresponding path program 9 times [2019-10-22 09:01:19,480 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:19,480 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439274450] [2019-10-22 09:01:19,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:19,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:19,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:19,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439274450] [2019-10-22 09:01:19,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460222094] [2019-10-22 09:01:19,619 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:19,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 09:01:19,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:19,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-22 09:01:19,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:19,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:19,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:19,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:19,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:19,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-22 09:01:19,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851829402] [2019-10-22 09:01:19,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:01:19,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:01:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:19,709 INFO L87 Difference]: Start difference. First operand 571 states and 1280 transitions. Second operand 15 states. [2019-10-22 09:01:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:19,972 INFO L93 Difference]: Finished difference Result 828 states and 1888 transitions. [2019-10-22 09:01:19,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:01:19,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-10-22 09:01:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:19,975 INFO L225 Difference]: With dead ends: 828 [2019-10-22 09:01:19,975 INFO L226 Difference]: Without dead ends: 615 [2019-10-22 09:01:19,976 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:01:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-10-22 09:01:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2019-10-22 09:01:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-22 09:01:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1344 transitions. [2019-10-22 09:01:19,990 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1344 transitions. Word has length 57 [2019-10-22 09:01:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:19,991 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1344 transitions. [2019-10-22 09:01:19,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:01:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1344 transitions. [2019-10-22 09:01:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-22 09:01:19,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:19,992 INFO L380 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] [2019-10-22 09:01:20,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:20,192 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1109733100, now seen corresponding path program 10 times [2019-10-22 09:01:20,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:20,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848964424] [2019-10-22 09:01:20,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:20,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:20,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:20,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848964424] [2019-10-22 09:01:20,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249552842] [2019-10-22 09:01:20,314 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:20,367 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:20,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:20,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:01:20,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:20,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:20,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:20,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:20,400 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:20,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-22 09:01:20,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125827627] [2019-10-22 09:01:20,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:01:20,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:20,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:01:20,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:01:20,402 INFO L87 Difference]: Start difference. First operand 603 states and 1344 transitions. Second operand 15 states. [2019-10-22 09:01:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:20,593 INFO L93 Difference]: Finished difference Result 876 states and 1984 transitions. [2019-10-22 09:01:20,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:01:20,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2019-10-22 09:01:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:20,595 INFO L225 Difference]: With dead ends: 876 [2019-10-22 09:01:20,595 INFO L226 Difference]: Without dead ends: 675 [2019-10-22 09:01:20,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:01:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2019-10-22 09:01:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 619. [2019-10-22 09:01:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-22 09:01:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1376 transitions. [2019-10-22 09:01:20,608 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1376 transitions. Word has length 61 [2019-10-22 09:01:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:20,608 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 1376 transitions. [2019-10-22 09:01:20,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:01:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1376 transitions. [2019-10-22 09:01:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-22 09:01:20,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:20,609 INFO L380 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] [2019-10-22 09:01:20,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:20,810 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:20,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1520447537, now seen corresponding path program 11 times [2019-10-22 09:01:20,810 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:20,810 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035429685] [2019-10-22 09:01:20,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:20,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:20,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:20,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035429685] [2019-10-22 09:01:20,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520561817] [2019-10-22 09:01:20,966 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:21,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-22 09:01:21,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:21,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:01:21,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:21,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:21,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:21,071 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:21,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-22 09:01:21,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350454976] [2019-10-22 09:01:21,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:01:21,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:01:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:21,073 INFO L87 Difference]: Start difference. First operand 619 states and 1376 transitions. Second operand 17 states. [2019-10-22 09:01:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:21,399 INFO L93 Difference]: Finished difference Result 904 states and 2040 transitions. [2019-10-22 09:01:21,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-22 09:01:21,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2019-10-22 09:01:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:21,402 INFO L225 Difference]: With dead ends: 904 [2019-10-22 09:01:21,402 INFO L226 Difference]: Without dead ends: 715 [2019-10-22 09:01:21,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-10-22 09:01:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2019-10-22 09:01:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 647. [2019-10-22 09:01:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-22 09:01:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1428 transitions. [2019-10-22 09:01:21,414 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1428 transitions. Word has length 65 [2019-10-22 09:01:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:21,415 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1428 transitions. [2019-10-22 09:01:21,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:01:21,415 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1428 transitions. [2019-10-22 09:01:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-22 09:01:21,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:21,416 INFO L380 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] [2019-10-22 09:01:21,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:21,617 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -57130703, now seen corresponding path program 12 times [2019-10-22 09:01:21,617 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:21,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936892130] [2019-10-22 09:01:21,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:21,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:21,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:21,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936892130] [2019-10-22 09:01:21,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946102955] [2019-10-22 09:01:21,775 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:21,818 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-22 09:01:21,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:21,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:01:21,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:21,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:21,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:21,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:21,840 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:21,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-22 09:01:21,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107160171] [2019-10-22 09:01:21,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:01:21,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:21,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:01:21,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:01:21,841 INFO L87 Difference]: Start difference. First operand 647 states and 1428 transitions. Second operand 17 states. [2019-10-22 09:01:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:22,111 INFO L93 Difference]: Finished difference Result 1058 states and 2397 transitions. [2019-10-22 09:01:22,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 09:01:22,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2019-10-22 09:01:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:22,113 INFO L225 Difference]: With dead ends: 1058 [2019-10-22 09:01:22,113 INFO L226 Difference]: Without dead ends: 763 [2019-10-22 09:01:22,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2019-10-22 09:01:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2019-10-22 09:01:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 679. [2019-10-22 09:01:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-22 09:01:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1492 transitions. [2019-10-22 09:01:22,126 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1492 transitions. Word has length 65 [2019-10-22 09:01:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:22,126 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1492 transitions. [2019-10-22 09:01:22,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:01:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1492 transitions. [2019-10-22 09:01:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-22 09:01:22,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:22,128 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 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] [2019-10-22 09:01:22,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:22,328 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash -484292207, now seen corresponding path program 13 times [2019-10-22 09:01:22,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:22,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470975783] [2019-10-22 09:01:22,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:22,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:22,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:22,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470975783] [2019-10-22 09:01:22,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309504752] [2019-10-22 09:01:22,485 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:22,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-22 09:01:22,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:22,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:22,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:22,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:22,578 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:22,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-22 09:01:22,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542172482] [2019-10-22 09:01:22,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 09:01:22,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 09:01:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:01:22,579 INFO L87 Difference]: Start difference. First operand 679 states and 1492 transitions. Second operand 18 states. [2019-10-22 09:01:22,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:22,851 INFO L93 Difference]: Finished difference Result 980 states and 2192 transitions. [2019-10-22 09:01:22,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 09:01:22,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2019-10-22 09:01:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:22,854 INFO L225 Difference]: With dead ends: 980 [2019-10-22 09:01:22,854 INFO L226 Difference]: Without dead ends: 779 [2019-10-22 09:01:22,854 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 09:01:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2019-10-22 09:01:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 500. [2019-10-22 09:01:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-10-22 09:01:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1134 transitions. [2019-10-22 09:01:22,865 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1134 transitions. Word has length 73 [2019-10-22 09:01:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:22,866 INFO L462 AbstractCegarLoop]: Abstraction has 500 states and 1134 transitions. [2019-10-22 09:01:22,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 09:01:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1134 transitions. [2019-10-22 09:01:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-22 09:01:22,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:22,867 INFO L380 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] [2019-10-22 09:01:23,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:23,067 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash -636577263, now seen corresponding path program 14 times [2019-10-22 09:01:23,068 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:23,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086578598] [2019-10-22 09:01:23,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:23,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086578598] [2019-10-22 09:01:23,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665620398] [2019-10-22 09:01:23,231 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:23,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:23,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:23,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:01:23,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:23,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:23,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:23,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:23,321 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:23,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-10-22 09:01:23,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226053585] [2019-10-22 09:01:23,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 09:01:23,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:23,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 09:01:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:01:23,322 INFO L87 Difference]: Start difference. First operand 500 states and 1134 transitions. Second operand 19 states. [2019-10-22 09:01:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:23,651 INFO L93 Difference]: Finished difference Result 1078 states and 2437 transitions. [2019-10-22 09:01:23,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 09:01:23,652 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2019-10-22 09:01:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:23,654 INFO L225 Difference]: With dead ends: 1078 [2019-10-22 09:01:23,654 INFO L226 Difference]: Without dead ends: 783 [2019-10-22 09:01:23,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 09:01:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-10-22 09:01:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 513. [2019-10-22 09:01:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2019-10-22 09:01:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1160 transitions. [2019-10-22 09:01:23,665 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1160 transitions. Word has length 73 [2019-10-22 09:01:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:23,666 INFO L462 AbstractCegarLoop]: Abstraction has 513 states and 1160 transitions. [2019-10-22 09:01:23,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 09:01:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1160 transitions. [2019-10-22 09:01:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-22 09:01:23,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:23,667 INFO L380 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] [2019-10-22 09:01:23,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:23,867 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash -934989010, now seen corresponding path program 15 times [2019-10-22 09:01:23,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:23,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4148375] [2019-10-22 09:01:23,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:23,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:24,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4148375] [2019-10-22 09:01:24,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191256333] [2019-10-22 09:01:24,060 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:24,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-22 09:01:24,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:24,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-22 09:01:24,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:24,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:24,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:24,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:24,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:24,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-22 09:01:24,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466624996] [2019-10-22 09:01:24,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 09:01:24,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 09:01:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:01:24,173 INFO L87 Difference]: Start difference. First operand 513 states and 1160 transitions. Second operand 20 states. [2019-10-22 09:01:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:24,525 INFO L93 Difference]: Finished difference Result 1126 states and 2533 transitions. [2019-10-22 09:01:24,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 09:01:24,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2019-10-22 09:01:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:24,527 INFO L225 Difference]: With dead ends: 1126 [2019-10-22 09:01:24,528 INFO L226 Difference]: Without dead ends: 831 [2019-10-22 09:01:24,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2019-10-22 09:01:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2019-10-22 09:01:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 532. [2019-10-22 09:01:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2019-10-22 09:01:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1198 transitions. [2019-10-22 09:01:24,539 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1198 transitions. Word has length 77 [2019-10-22 09:01:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:24,539 INFO L462 AbstractCegarLoop]: Abstraction has 532 states and 1198 transitions. [2019-10-22 09:01:24,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 09:01:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1198 transitions. [2019-10-22 09:01:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-22 09:01:24,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:24,540 INFO L380 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] [2019-10-22 09:01:24,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:24,741 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash 596513521, now seen corresponding path program 16 times [2019-10-22 09:01:24,741 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:24,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310895548] [2019-10-22 09:01:24,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:24,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310895548] [2019-10-22 09:01:24,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943030099] [2019-10-22 09:01:24,929 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:24,989 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:24,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:24,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 09:01:24,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:25,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:25,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:25,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:25,027 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:25,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-22 09:01:25,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351016501] [2019-10-22 09:01:25,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:01:25,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:01:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:01:25,029 INFO L87 Difference]: Start difference. First operand 532 states and 1198 transitions. Second operand 21 states. [2019-10-22 09:01:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:25,419 INFO L93 Difference]: Finished difference Result 1142 states and 2565 transitions. [2019-10-22 09:01:25,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-22 09:01:25,419 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-10-22 09:01:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:25,421 INFO L225 Difference]: With dead ends: 1142 [2019-10-22 09:01:25,421 INFO L226 Difference]: Without dead ends: 847 [2019-10-22 09:01:25,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2019-10-22 09:01:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-10-22 09:01:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 545. [2019-10-22 09:01:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-10-22 09:01:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1224 transitions. [2019-10-22 09:01:25,432 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1224 transitions. Word has length 81 [2019-10-22 09:01:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:25,433 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 1224 transitions. [2019-10-22 09:01:25,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:01:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1224 transitions. [2019-10-22 09:01:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-22 09:01:25,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:25,434 INFO L380 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] [2019-10-22 09:01:25,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:25,635 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash 769408782, now seen corresponding path program 17 times [2019-10-22 09:01:25,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:25,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669956468] [2019-10-22 09:01:25,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:25,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669956468] [2019-10-22 09:01:25,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773195658] [2019-10-22 09:01:25,846 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:25,898 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-22 09:01:25,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:25,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:01:25,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:25,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:25,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:25,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:25,938 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:25,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-22 09:01:25,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873685875] [2019-10-22 09:01:25,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:01:25,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:01:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:01:25,941 INFO L87 Difference]: Start difference. First operand 545 states and 1224 transitions. Second operand 22 states. [2019-10-22 09:01:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:26,321 INFO L93 Difference]: Finished difference Result 1190 states and 2661 transitions. [2019-10-22 09:01:26,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 09:01:26,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2019-10-22 09:01:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:26,324 INFO L225 Difference]: With dead ends: 1190 [2019-10-22 09:01:26,324 INFO L226 Difference]: Without dead ends: 895 [2019-10-22 09:01:26,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=484, Invalid=1238, Unknown=0, NotChecked=0, Total=1722 [2019-10-22 09:01:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2019-10-22 09:01:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 564. [2019-10-22 09:01:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-10-22 09:01:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1262 transitions. [2019-10-22 09:01:26,335 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1262 transitions. Word has length 85 [2019-10-22 09:01:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:26,335 INFO L462 AbstractCegarLoop]: Abstraction has 564 states and 1262 transitions. [2019-10-22 09:01:26,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:01:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1262 transitions. [2019-10-22 09:01:26,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-22 09:01:26,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:26,337 INFO L380 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] [2019-10-22 09:01:26,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:26,538 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:26,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1308011473, now seen corresponding path program 18 times [2019-10-22 09:01:26,538 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:26,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635314412] [2019-10-22 09:01:26,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:26,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:26,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:26,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635314412] [2019-10-22 09:01:26,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526987159] [2019-10-22 09:01:26,768 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:26,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-22 09:01:26,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:26,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:01:26,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:26,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:26,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:26,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:26,870 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:26,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-10-22 09:01:26,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904166139] [2019-10-22 09:01:26,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:01:26,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:26,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:01:26,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:01:26,874 INFO L87 Difference]: Start difference. First operand 564 states and 1262 transitions. Second operand 23 states. [2019-10-22 09:01:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:27,259 INFO L93 Difference]: Finished difference Result 1108 states and 2448 transitions. [2019-10-22 09:01:27,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-22 09:01:27,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2019-10-22 09:01:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:27,261 INFO L225 Difference]: With dead ends: 1108 [2019-10-22 09:01:27,262 INFO L226 Difference]: Without dead ends: 871 [2019-10-22 09:01:27,262 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=529, Invalid=1277, Unknown=0, NotChecked=0, Total=1806 [2019-10-22 09:01:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2019-10-22 09:01:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 843. [2019-10-22 09:01:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2019-10-22 09:01:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1824 transitions. [2019-10-22 09:01:27,275 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1824 transitions. Word has length 89 [2019-10-22 09:01:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:27,276 INFO L462 AbstractCegarLoop]: Abstraction has 843 states and 1824 transitions. [2019-10-22 09:01:27,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:01:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1824 transitions. [2019-10-22 09:01:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-22 09:01:27,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:27,278 INFO L380 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] [2019-10-22 09:01:27,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:27,478 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1189516562, now seen corresponding path program 19 times [2019-10-22 09:01:27,479 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:27,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469772471] [2019-10-22 09:01:27,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:27,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:27,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:27,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469772471] [2019-10-22 09:01:27,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032008344] [2019-10-22 09:01:27,702 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:27,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-22 09:01:27,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:27,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:27,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:27,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:27,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:27,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-10-22 09:01:27,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449287139] [2019-10-22 09:01:27,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 09:01:27,806 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 09:01:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:01:27,806 INFO L87 Difference]: Start difference. First operand 843 states and 1824 transitions. Second operand 24 states. [2019-10-22 09:01:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:28,178 INFO L93 Difference]: Finished difference Result 1214 states and 2709 transitions. [2019-10-22 09:01:28,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-22 09:01:28,178 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2019-10-22 09:01:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:28,180 INFO L225 Difference]: With dead ends: 1214 [2019-10-22 09:01:28,180 INFO L226 Difference]: Without dead ends: 919 [2019-10-22 09:01:28,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1485, Unknown=0, NotChecked=0, Total=2070 [2019-10-22 09:01:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2019-10-22 09:01:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 875. [2019-10-22 09:01:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2019-10-22 09:01:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1888 transitions. [2019-10-22 09:01:28,193 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1888 transitions. Word has length 93 [2019-10-22 09:01:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:28,194 INFO L462 AbstractCegarLoop]: Abstraction has 875 states and 1888 transitions. [2019-10-22 09:01:28,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 09:01:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1888 transitions. [2019-10-22 09:01:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-22 09:01:28,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:28,196 INFO L380 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] [2019-10-22 09:01:28,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:28,396 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:28,396 INFO L82 PathProgramCache]: Analyzing trace with hash -446138604, now seen corresponding path program 20 times [2019-10-22 09:01:28,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:28,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979898331] [2019-10-22 09:01:28,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:28,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:28,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979898331] [2019-10-22 09:01:28,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176284941] [2019-10-22 09:01:28,602 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:28,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:01:28,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:28,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-22 09:01:28,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:28,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:28,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:28,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:01:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:28,678 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:28,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-10-22 09:01:28,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192841342] [2019-10-22 09:01:28,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 09:01:28,679 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:28,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 09:01:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:01:28,679 INFO L87 Difference]: Start difference. First operand 875 states and 1888 transitions. Second operand 24 states. [2019-10-22 09:01:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:29,165 INFO L93 Difference]: Finished difference Result 1160 states and 2552 transitions. [2019-10-22 09:01:29,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-22 09:01:29,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2019-10-22 09:01:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:29,168 INFO L225 Difference]: With dead ends: 1160 [2019-10-22 09:01:29,169 INFO L226 Difference]: Without dead ends: 971 [2019-10-22 09:01:29,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1440, Unknown=0, NotChecked=0, Total=1980 [2019-10-22 09:01:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2019-10-22 09:01:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 903. [2019-10-22 09:01:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 903 states. [2019-10-22 09:01:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1940 transitions. [2019-10-22 09:01:29,187 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1940 transitions. Word has length 93 [2019-10-22 09:01:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:29,187 INFO L462 AbstractCegarLoop]: Abstraction has 903 states and 1940 transitions. [2019-10-22 09:01:29,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 09:01:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1940 transitions. [2019-10-22 09:01:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-22 09:01:29,189 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:29,189 INFO L380 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] [2019-10-22 09:01:29,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:29,389 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:29,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:29,390 INFO L82 PathProgramCache]: Analyzing trace with hash -237193522, now seen corresponding path program 21 times [2019-10-22 09:01:29,390 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:29,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218475091] [2019-10-22 09:01:29,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:29,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:29,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 315 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:29,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218475091] [2019-10-22 09:01:29,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626097162] [2019-10-22 09:01:29,676 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:29,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-22 09:01:29,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:29,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 09:01:29,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:29,815 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:29,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2019-10-22 09:01:29,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014523736] [2019-10-22 09:01:29,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:01:29,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:01:29,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:01:29,817 INFO L87 Difference]: Start difference. First operand 903 states and 1940 transitions. Second operand 23 states. [2019-10-22 09:01:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:30,126 INFO L93 Difference]: Finished difference Result 3759 states and 7467 transitions. [2019-10-22 09:01:30,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-22 09:01:30,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2019-10-22 09:01:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:30,129 INFO L225 Difference]: With dead ends: 3759 [2019-10-22 09:01:30,130 INFO L226 Difference]: Without dead ends: 879 [2019-10-22 09:01:30,130 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2019-10-22 09:01:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2019-10-22 09:01:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2019-10-22 09:01:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2019-10-22 09:01:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1785 transitions. [2019-10-22 09:01:30,142 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1785 transitions. Word has length 101 [2019-10-22 09:01:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:30,143 INFO L462 AbstractCegarLoop]: Abstraction has 879 states and 1785 transitions. [2019-10-22 09:01:30,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:01:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1785 transitions. [2019-10-22 09:01:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-22 09:01:30,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:01:30,145 INFO L380 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] [2019-10-22 09:01:30,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:30,346 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:01:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1872676108, now seen corresponding path program 22 times [2019-10-22 09:01:30,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:30,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178001143] [2019-10-22 09:01:30,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:30,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:30,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 253 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 09:01:30,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178001143] [2019-10-22 09:01:30,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377017703] [2019-10-22 09:01:30,578 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:30,647 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:01:30,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:30,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 09:01:30,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 09:01:30,680 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 09:01:30,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2019-10-22 09:01:30,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725858482] [2019-10-22 09:01:30,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:01:30,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:01:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-10-22 09:01:30,681 INFO L87 Difference]: Start difference. First operand 879 states and 1785 transitions. Second operand 23 states. [2019-10-22 09:01:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:30,979 INFO L93 Difference]: Finished difference Result 3647 states and 6682 transitions. [2019-10-22 09:01:30,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-22 09:01:30,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2019-10-22 09:01:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:01:30,980 INFO L225 Difference]: With dead ends: 3647 [2019-10-22 09:01:30,980 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:01:30,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2019-10-22 09:01:30,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:01:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:01:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:01:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:01:30,981 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2019-10-22 09:01:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:01:30,981 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:30,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:01:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:01:30,982 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:01:31,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:31,184 INFO L303 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-10-22 09:01:31,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:01:31 BasicIcfg [2019-10-22 09:01:31,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:01:31,186 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:31,186 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:31,186 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:31,187 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:12" (3/4) ... [2019-10-22 09:01:31,190 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:01:31,197 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-10-22 09:01:31,197 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-10-22 09:01:31,200 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-10-22 09:01:31,201 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-10-22 09:01:31,201 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-10-22 09:01:31,230 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f7a2f63b-b761-4759-846c-b99e2b2c56b7/bin/uautomizer/witness.graphml [2019-10-22 09:01:31,230 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:31,232 INFO L168 Benchmark]: Toolchain (without parser) took 19632.53 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 498.1 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -146.7 MB). Peak memory consumption was 351.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:31,232 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:31,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 515.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -172.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:31,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.07 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:31,235 INFO L168 Benchmark]: Boogie Preprocessor took 21.95 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:31,236 INFO L168 Benchmark]: RCFGBuilder took 334.35 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: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:31,236 INFO L168 Benchmark]: TraceAbstraction took 18671.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 341.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.2 MB). Peak memory consumption was 334.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:31,236 INFO L168 Benchmark]: Witness Printer took 44.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:31,238 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 515.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -172.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.07 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.95 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 334.35 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: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18671.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 341.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.2 MB). Peak memory consumption was 334.1 MB. Max. memory is 11.5 GB. * Witness Printer took 44.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 703]: 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. Result: SAFE, OverallTime: 18.5s, OverallIterations: 27, TraceHistogramMax: 11, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1900 SDtfs, 7348 SDslu, 10933 SDs, 0 SdLazy, 2252 SolverSat, 986 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2189 GetRequests, 1513 SyntacticMatches, 0 SemanticMatches, 676 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 7.4s 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 DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 27 MinimizatonAttempts, 2827 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 3062 NumberOfCodeBlocks, 3061 NumberOfCodeBlocksAsserted, 113 NumberOfCheckSat, 3012 ConstructedInterpolants, 0 QuantifiedInterpolants, 622000 SizeOfPredicates, 333 NumberOfNonLiveVariables, 3660 ConjunctsInSsa, 402 ConjunctsInUnsatCore, 50 InterpolantComputations, 6 PerfectInterpolantSequences, 1266/5504 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...