./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-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/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 9b34aa4c2467f96ebe08cbccd6e971201d28a8fd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:29:04,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:29:04,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:29:04,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:29:04,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:29:04,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:29:04,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:29:04,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:29:04,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:29:04,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:29:04,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:29:04,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:29:04,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:29:04,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:29:04,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:29:04,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:29:04,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:29:04,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:29:04,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:29:04,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:29:04,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:29:04,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:29:04,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:29:05,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:29:05,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:29:05,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:29:05,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:29:05,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:29:05,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:29:05,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:29:05,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:29:05,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:29:05,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:29:05,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:29:05,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:29:05,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:29:05,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:29:05,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:29:05,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:29:05,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:29:05,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:29:05,019 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:29:05,033 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:29:05,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:29:05,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:29:05,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:29:05,035 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:29:05,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:29:05,036 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:29:05,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:29:05,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:29:05,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:29:05,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:29:05,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:29:05,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:29:05,044 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:29:05,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:29:05,045 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:29:05,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:29:05,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:29:05,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:29:05,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:29:05,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:29:05,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:29:05,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:29:05,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:29:05,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:29:05,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:29:05,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:29:05,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:29:05,048 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/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 -> 9b34aa4c2467f96ebe08cbccd6e971201d28a8fd [2019-11-16 00:29:05,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:29:05,103 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:29:05,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:29:05,109 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:29:05,109 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:29:05,110 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2019-11-16 00:29:05,165 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/data/31b00d1a6/096ee7876dc54ed49bfd76fe85f062af/FLAG9facc6dd3 [2019-11-16 00:29:05,607 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:29:05,608 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/sv-benchmarks/c/pthread/triangular-longest-1.i [2019-11-16 00:29:05,623 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/data/31b00d1a6/096ee7876dc54ed49bfd76fe85f062af/FLAG9facc6dd3 [2019-11-16 00:29:05,978 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/data/31b00d1a6/096ee7876dc54ed49bfd76fe85f062af [2019-11-16 00:29:05,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:29:05,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:29:05,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:29:05,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:29:05,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:29:05,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:29:05" (1/1) ... [2019-11-16 00:29:05,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44354b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:05, skipping insertion in model container [2019-11-16 00:29:05,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:29:05" (1/1) ... [2019-11-16 00:29:05,996 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:29:06,057 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:29:06,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:29:06,438 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:29:06,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:29:06,559 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:29:06,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06 WrapperNode [2019-11-16 00:29:06,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:29:06,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:29:06,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:29:06,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:29:06,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:29:06,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:29:06,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:29:06,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:29:06,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... [2019-11-16 00:29:06,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:29:06,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:29:06,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:29:06,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:29:06,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-16 00:29:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-16 00:29:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-16 00:29:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-16 00:29:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-16 00:29:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-16 00:29:06,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-16 00:29:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-16 00:29:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-16 00:29:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:29:06,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:29:06,721 WARN L202 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-16 00:29:07,014 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:29:07,014 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-16 00:29:07,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:29:07 BoogieIcfgContainer [2019-11-16 00:29:07,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:29:07,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:29:07,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:29:07,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:29:07,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:29:05" (1/3) ... [2019-11-16 00:29:07,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67855e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:29:07, skipping insertion in model container [2019-11-16 00:29:07,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:29:06" (2/3) ... [2019-11-16 00:29:07,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67855e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:29:07, skipping insertion in model container [2019-11-16 00:29:07,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:29:07" (3/3) ... [2019-11-16 00:29:07,021 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-11-16 00:29:07,047 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,047 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,048 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,048 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,048 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,048 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,049 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,049 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,049 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,049 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,049 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,049 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,050 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,050 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,050 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,050 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,050 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,051 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,051 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,051 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,051 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,051 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,051 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,052 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,052 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,052 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,052 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,052 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:29:07,066 WARN L141 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-16 00:29:07,066 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:29:07,073 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:29:07,084 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:29:07,102 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:29:07,102 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:29:07,102 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:29:07,102 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:29:07,103 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:29:07,103 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:29:07,103 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:29:07,103 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:29:07,111 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 48 transitions [2019-11-16 00:29:07,198 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2019-11-16 00:29:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2019-11-16 00:29:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-16 00:29:07,210 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:07,211 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:07,214 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1918718107, now seen corresponding path program 1 times [2019-11-16 00:29:07,228 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:07,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365738251] [2019-11-16 00:29:07,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:07,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:07,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:07,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365738251] [2019-11-16 00:29:07,547 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:29:07,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:29:07,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893399438] [2019-11-16 00:29:07,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:29:07,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:07,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:29:07,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:29:07,567 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2019-11-16 00:29:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:07,716 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2019-11-16 00:29:07,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:29:07,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-16 00:29:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:07,751 INFO L225 Difference]: With dead ends: 1777 [2019-11-16 00:29:07,752 INFO L226 Difference]: Without dead ends: 499 [2019-11-16 00:29:07,753 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 [2019-11-16 00:29:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-11-16 00:29:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2019-11-16 00:29:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2019-11-16 00:29:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2019-11-16 00:29:07,849 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2019-11-16 00:29:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:07,850 INFO L462 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2019-11-16 00:29:07,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:29:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2019-11-16 00:29:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:29:07,857 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:07,857 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] [2019-11-16 00:29:07,857 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash 160945497, now seen corresponding path program 1 times [2019-11-16 00:29:07,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:07,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676670332] [2019-11-16 00:29:07,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:07,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:07,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:08,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676670332] [2019-11-16 00:29:08,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:29:08,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:29:08,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018185638] [2019-11-16 00:29:08,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:29:08,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:29:08,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:29:08,044 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2019-11-16 00:29:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:08,094 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2019-11-16 00:29:08,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:29:08,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-16 00:29:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:08,097 INFO L225 Difference]: With dead ends: 464 [2019-11-16 00:29:08,097 INFO L226 Difference]: Without dead ends: 343 [2019-11-16 00:29:08,098 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 [2019-11-16 00:29:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-16 00:29:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2019-11-16 00:29:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-16 00:29:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2019-11-16 00:29:08,110 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2019-11-16 00:29:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:08,110 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2019-11-16 00:29:08,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:29:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2019-11-16 00:29:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:29:08,112 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:08,112 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] [2019-11-16 00:29:08,113 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:08,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash -509840719, now seen corresponding path program 1 times [2019-11-16 00:29:08,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:08,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939582499] [2019-11-16 00:29:08,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:08,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:08,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:08,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939582499] [2019-11-16 00:29:08,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:29:08,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:29:08,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614798747] [2019-11-16 00:29:08,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:29:08,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:29:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:29:08,217 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2019-11-16 00:29:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:08,336 INFO L93 Difference]: Finished difference Result 518 states and 1261 transitions. [2019-11-16 00:29:08,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:29:08,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-16 00:29:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:08,340 INFO L225 Difference]: With dead ends: 518 [2019-11-16 00:29:08,340 INFO L226 Difference]: Without dead ends: 309 [2019-11-16 00:29:08,341 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 [2019-11-16 00:29:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-11-16 00:29:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2019-11-16 00:29:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2019-11-16 00:29:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2019-11-16 00:29:08,353 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 22 [2019-11-16 00:29:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:08,353 INFO L462 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2019-11-16 00:29:08,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:29:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2019-11-16 00:29:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-16 00:29:08,359 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:08,359 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] [2019-11-16 00:29:08,359 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1020173103, now seen corresponding path program 1 times [2019-11-16 00:29:08,360 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:08,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283977194] [2019-11-16 00:29:08,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:08,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:08,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:08,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283977194] [2019-11-16 00:29:08,498 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:29:08,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-16 00:29:08,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406952713] [2019-11-16 00:29:08,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:29:08,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:08,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:29:08,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:29:08,499 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2019-11-16 00:29:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:08,606 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2019-11-16 00:29:08,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:29:08,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-16 00:29:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:08,609 INFO L225 Difference]: With dead ends: 456 [2019-11-16 00:29:08,610 INFO L226 Difference]: Without dead ends: 319 [2019-11-16 00:29:08,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:29:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-11-16 00:29:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-11-16 00:29:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-16 00:29:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2019-11-16 00:29:08,622 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2019-11-16 00:29:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:08,622 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2019-11-16 00:29:08,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:29:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2019-11-16 00:29:08,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-16 00:29:08,624 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:08,624 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] [2019-11-16 00:29:08,624 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2074375186, now seen corresponding path program 1 times [2019-11-16 00:29:08,625 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:08,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362834744] [2019-11-16 00:29:08,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:08,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:08,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:08,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362834744] [2019-11-16 00:29:08,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687429699] [2019-11-16 00:29:08,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:08,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-16 00:29:08,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:08,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:08,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:08,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:08,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:08,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-16 00:29:08,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50811525] [2019-11-16 00:29:08,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:29:08,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:29:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:29:08,936 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2019-11-16 00:29:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:09,089 INFO L93 Difference]: Finished difference Result 564 states and 1360 transitions. [2019-11-16 00:29:09,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-16 00:29:09,090 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-16 00:29:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:09,092 INFO L225 Difference]: With dead ends: 564 [2019-11-16 00:29:09,093 INFO L226 Difference]: Without dead ends: 351 [2019-11-16 00:29:09,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:29:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-11-16 00:29:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2019-11-16 00:29:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-11-16 00:29:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2019-11-16 00:29:09,115 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2019-11-16 00:29:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:09,115 INFO L462 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2019-11-16 00:29:09,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:29:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2019-11-16 00:29:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-16 00:29:09,117 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:09,117 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] [2019-11-16 00:29:09,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:09,321 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:09,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1553903636, now seen corresponding path program 1 times [2019-11-16 00:29:09,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:09,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531127357] [2019-11-16 00:29:09,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:09,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:09,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:09,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531127357] [2019-11-16 00:29:09,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464289178] [2019-11-16 00:29:09,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:09,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-16 00:29:09,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:09,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:09,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:09,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:09,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-16 00:29:09,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545333595] [2019-11-16 00:29:09,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:29:09,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:29:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:29:09,549 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 8 states. [2019-11-16 00:29:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:09,665 INFO L93 Difference]: Finished difference Result 612 states and 1456 transitions. [2019-11-16 00:29:09,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-16 00:29:09,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-16 00:29:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:09,670 INFO L225 Difference]: With dead ends: 612 [2019-11-16 00:29:09,671 INFO L226 Difference]: Without dead ends: 423 [2019-11-16 00:29:09,671 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 [2019-11-16 00:29:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2019-11-16 00:29:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 395. [2019-11-16 00:29:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2019-11-16 00:29:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 928 transitions. [2019-11-16 00:29:09,686 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 928 transitions. Word has length 29 [2019-11-16 00:29:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:09,688 INFO L462 AbstractCegarLoop]: Abstraction has 395 states and 928 transitions. [2019-11-16 00:29:09,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:29:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 928 transitions. [2019-11-16 00:29:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-16 00:29:09,691 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:09,692 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] [2019-11-16 00:29:09,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:09,896 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:09,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash 762173390, now seen corresponding path program 1 times [2019-11-16 00:29:09,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:09,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010188856] [2019-11-16 00:29:09,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:09,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:09,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:10,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010188856] [2019-11-16 00:29:10,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312280508] [2019-11-16 00:29:10,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:10,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-16 00:29:10,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:10,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:10,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:10,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:10,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:10,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-16 00:29:10,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846564340] [2019-11-16 00:29:10,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-16 00:29:10,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-16 00:29:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:29:10,181 INFO L87 Difference]: Start difference. First operand 395 states and 928 transitions. Second operand 10 states. [2019-11-16 00:29:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:10,421 INFO L93 Difference]: Finished difference Result 652 states and 1536 transitions. [2019-11-16 00:29:10,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-16 00:29:10,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-16 00:29:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:10,425 INFO L225 Difference]: With dead ends: 652 [2019-11-16 00:29:10,425 INFO L226 Difference]: Without dead ends: 439 [2019-11-16 00:29:10,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-11-16 00:29:10,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2019-11-16 00:29:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 427. [2019-11-16 00:29:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-11-16 00:29:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 992 transitions. [2019-11-16 00:29:10,439 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 992 transitions. Word has length 37 [2019-11-16 00:29:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:10,440 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 992 transitions. [2019-11-16 00:29:10,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-16 00:29:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 992 transitions. [2019-11-16 00:29:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-16 00:29:10,441 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:10,442 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] [2019-11-16 00:29:10,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:10,647 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:10,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1927296628, now seen corresponding path program 2 times [2019-11-16 00:29:10,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:10,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636495153] [2019-11-16 00:29:10,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:10,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:10,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:29:10,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636495153] [2019-11-16 00:29:10,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297635881] [2019-11-16 00:29:10,735 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:10,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:29:10,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:10,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:29:10,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:10,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:10,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:10,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:29:10,828 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:10,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-16 00:29:10,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449997491] [2019-11-16 00:29:10,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-16 00:29:10,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-16 00:29:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:29:10,829 INFO L87 Difference]: Start difference. First operand 427 states and 992 transitions. Second operand 9 states. [2019-11-16 00:29:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:10,981 INFO L93 Difference]: Finished difference Result 684 states and 1600 transitions. [2019-11-16 00:29:10,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-16 00:29:10,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-16 00:29:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:10,985 INFO L225 Difference]: With dead ends: 684 [2019-11-16 00:29:10,985 INFO L226 Difference]: Without dead ends: 447 [2019-11-16 00:29:10,986 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 [2019-11-16 00:29:10,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-16 00:29:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 348. [2019-11-16 00:29:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2019-11-16 00:29:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2019-11-16 00:29:10,996 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 37 [2019-11-16 00:29:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:10,997 INFO L462 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2019-11-16 00:29:10,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-16 00:29:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2019-11-16 00:29:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-16 00:29:10,999 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:10,999 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] [2019-11-16 00:29:11,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:11,205 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:11,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1001125521, now seen corresponding path program 3 times [2019-11-16 00:29:11,205 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:11,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427550482] [2019-11-16 00:29:11,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:11,206 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:11,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:11,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427550482] [2019-11-16 00:29:11,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487204308] [2019-11-16 00:29:11,344 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:11,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-16 00:29:11,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:11,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-16 00:29:11,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:11,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:11,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:11,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:11,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:11,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-16 00:29:11,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624738189] [2019-11-16 00:29:11,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-16 00:29:11,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-16 00:29:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-16 00:29:11,458 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2019-11-16 00:29:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:11,678 INFO L93 Difference]: Finished difference Result 676 states and 1584 transitions. [2019-11-16 00:29:11,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:29:11,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-11-16 00:29:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:11,682 INFO L225 Difference]: With dead ends: 676 [2019-11-16 00:29:11,682 INFO L226 Difference]: Without dead ends: 463 [2019-11-16 00:29:11,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:29:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-11-16 00:29:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 361. [2019-11-16 00:29:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2019-11-16 00:29:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 856 transitions. [2019-11-16 00:29:11,693 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 856 transitions. Word has length 41 [2019-11-16 00:29:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:11,693 INFO L462 AbstractCegarLoop]: Abstraction has 361 states and 856 transitions. [2019-11-16 00:29:11,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-16 00:29:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 856 transitions. [2019-11-16 00:29:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-16 00:29:11,694 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:11,695 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] [2019-11-16 00:29:11,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:11,898 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:11,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1827029934, now seen corresponding path program 4 times [2019-11-16 00:29:11,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:11,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572165705] [2019-11-16 00:29:11,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:11,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:11,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:12,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572165705] [2019-11-16 00:29:12,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340102714] [2019-11-16 00:29:12,028 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:12,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:29:12,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:12,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-16 00:29:12,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:12,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:12,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:12,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:12,132 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:12,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-16 00:29:12,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442111349] [2019-11-16 00:29:12,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:29:12,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:29:12,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:29:12,137 INFO L87 Difference]: Start difference. First operand 361 states and 856 transitions. Second operand 12 states. [2019-11-16 00:29:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:12,377 INFO L93 Difference]: Finished difference Result 708 states and 1648 transitions. [2019-11-16 00:29:12,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-16 00:29:12,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-16 00:29:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:12,380 INFO L225 Difference]: With dead ends: 708 [2019-11-16 00:29:12,380 INFO L226 Difference]: Without dead ends: 495 [2019-11-16 00:29:12,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:29:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-11-16 00:29:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2019-11-16 00:29:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2019-11-16 00:29:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2019-11-16 00:29:12,399 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 45 [2019-11-16 00:29:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:12,401 INFO L462 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2019-11-16 00:29:12,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:29:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2019-11-16 00:29:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-16 00:29:12,402 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:12,402 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] [2019-11-16 00:29:12,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:12,605 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1380380529, now seen corresponding path program 5 times [2019-11-16 00:29:12,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:12,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431031907] [2019-11-16 00:29:12,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:12,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:12,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:12,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431031907] [2019-11-16 00:29:12,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581035819] [2019-11-16 00:29:12,778 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:12,848 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-16 00:29:12,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:12,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-16 00:29:12,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:12,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:12,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:12,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:12,888 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:12,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-16 00:29:12,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334204519] [2019-11-16 00:29:12,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-16 00:29:12,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:12,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-16 00:29:12,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:29:12,890 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2019-11-16 00:29:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:13,179 INFO L93 Difference]: Finished difference Result 740 states and 1712 transitions. [2019-11-16 00:29:13,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-16 00:29:13,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-11-16 00:29:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:13,183 INFO L225 Difference]: With dead ends: 740 [2019-11-16 00:29:13,184 INFO L226 Difference]: Without dead ends: 527 [2019-11-16 00:29:13,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:29:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-11-16 00:29:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2019-11-16 00:29:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2019-11-16 00:29:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 920 transitions. [2019-11-16 00:29:13,199 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 920 transitions. Word has length 49 [2019-11-16 00:29:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:13,199 INFO L462 AbstractCegarLoop]: Abstraction has 393 states and 920 transitions. [2019-11-16 00:29:13,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-16 00:29:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 920 transitions. [2019-11-16 00:29:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-16 00:29:13,201 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:13,201 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] [2019-11-16 00:29:13,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:13,413 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash 178573198, now seen corresponding path program 6 times [2019-11-16 00:29:13,414 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:13,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618859111] [2019-11-16 00:29:13,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:13,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:13,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:13,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618859111] [2019-11-16 00:29:13,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122034711] [2019-11-16 00:29:13,583 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:13,647 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-16 00:29:13,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:13,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-16 00:29:13,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:13,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:13,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:13,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:13,689 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:13,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-16 00:29:13,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080867900] [2019-11-16 00:29:13,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:29:13,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:29:13,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:29:13,691 INFO L87 Difference]: Start difference. First operand 393 states and 920 transitions. Second operand 14 states. [2019-11-16 00:29:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:14,027 INFO L93 Difference]: Finished difference Result 788 states and 1808 transitions. [2019-11-16 00:29:14,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-16 00:29:14,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2019-11-16 00:29:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:14,032 INFO L225 Difference]: With dead ends: 788 [2019-11-16 00:29:14,032 INFO L226 Difference]: Without dead ends: 599 [2019-11-16 00:29:14,032 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-11-16 00:29:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-11-16 00:29:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 571. [2019-11-16 00:29:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2019-11-16 00:29:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1280 transitions. [2019-11-16 00:29:14,052 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1280 transitions. Word has length 53 [2019-11-16 00:29:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:14,052 INFO L462 AbstractCegarLoop]: Abstraction has 571 states and 1280 transitions. [2019-11-16 00:29:14,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:29:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1280 transitions. [2019-11-16 00:29:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-16 00:29:14,054 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:14,054 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] [2019-11-16 00:29:14,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:14,261 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 910886993, now seen corresponding path program 7 times [2019-11-16 00:29:14,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:14,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683804522] [2019-11-16 00:29:14,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:14,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:14,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:14,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683804522] [2019-11-16 00:29:14,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478097459] [2019-11-16 00:29:14,418 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:14,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-16 00:29:14,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:14,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:14,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:14,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:14,543 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:14,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-16 00:29:14,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912387514] [2019-11-16 00:29:14,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-16 00:29:14,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-16 00:29:14,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:29:14,545 INFO L87 Difference]: Start difference. First operand 571 states and 1280 transitions. Second operand 15 states. [2019-11-16 00:29:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:14,865 INFO L93 Difference]: Finished difference Result 828 states and 1888 transitions. [2019-11-16 00:29:14,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-16 00:29:14,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-11-16 00:29:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:14,869 INFO L225 Difference]: With dead ends: 828 [2019-11-16 00:29:14,870 INFO L226 Difference]: Without dead ends: 591 [2019-11-16 00:29:14,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:29:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2019-11-16 00:29:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 425. [2019-11-16 00:29:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2019-11-16 00:29:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 984 transitions. [2019-11-16 00:29:14,892 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 984 transitions. Word has length 57 [2019-11-16 00:29:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:14,893 INFO L462 AbstractCegarLoop]: Abstraction has 425 states and 984 transitions. [2019-11-16 00:29:14,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-16 00:29:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 984 transitions. [2019-11-16 00:29:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-16 00:29:14,894 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:14,894 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] [2019-11-16 00:29:15,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:15,101 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -292979858, now seen corresponding path program 8 times [2019-11-16 00:29:15,101 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:15,101 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072239065] [2019-11-16 00:29:15,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:15,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:15,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:15,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072239065] [2019-11-16 00:29:15,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659334232] [2019-11-16 00:29:15,299 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:15,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:29:15,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:15,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-16 00:29:15,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:15,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:15,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:15,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:15,401 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:15,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-16 00:29:15,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902566608] [2019-11-16 00:29:15,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-16 00:29:15,402 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:15,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-16 00:29:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-16 00:29:15,402 INFO L87 Difference]: Start difference. First operand 425 states and 984 transitions. Second operand 16 states. [2019-11-16 00:29:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:15,736 INFO L93 Difference]: Finished difference Result 852 states and 1936 transitions. [2019-11-16 00:29:15,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-16 00:29:15,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2019-11-16 00:29:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:15,741 INFO L225 Difference]: With dead ends: 852 [2019-11-16 00:29:15,742 INFO L226 Difference]: Without dead ends: 663 [2019-11-16 00:29:15,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=581, Unknown=0, NotChecked=0, Total=812 [2019-11-16 00:29:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2019-11-16 00:29:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 635. [2019-11-16 00:29:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-11-16 00:29:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1408 transitions. [2019-11-16 00:29:15,758 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1408 transitions. Word has length 61 [2019-11-16 00:29:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:15,758 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 1408 transitions. [2019-11-16 00:29:15,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-16 00:29:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1408 transitions. [2019-11-16 00:29:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-16 00:29:15,760 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:15,760 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] [2019-11-16 00:29:15,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:15,964 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash -57130703, now seen corresponding path program 9 times [2019-11-16 00:29:15,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:15,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471441417] [2019-11-16 00:29:15,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:15,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:15,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:16,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471441417] [2019-11-16 00:29:16,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917793533] [2019-11-16 00:29:16,157 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:16,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-16 00:29:16,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:16,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-16 00:29:16,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:16,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:16,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:16,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:16,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:16,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-16 00:29:16,285 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278517052] [2019-11-16 00:29:16,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-16 00:29:16,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:16,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-16 00:29:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-16 00:29:16,287 INFO L87 Difference]: Start difference. First operand 635 states and 1408 transitions. Second operand 17 states. [2019-11-16 00:29:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:16,699 INFO L93 Difference]: Finished difference Result 892 states and 2016 transitions. [2019-11-16 00:29:16,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-16 00:29:16,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2019-11-16 00:29:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:16,704 INFO L225 Difference]: With dead ends: 892 [2019-11-16 00:29:16,704 INFO L226 Difference]: Without dead ends: 703 [2019-11-16 00:29:16,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2019-11-16 00:29:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2019-11-16 00:29:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 481. [2019-11-16 00:29:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2019-11-16 00:29:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1096 transitions. [2019-11-16 00:29:16,725 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1096 transitions. Word has length 65 [2019-11-16 00:29:16,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:16,725 INFO L462 AbstractCegarLoop]: Abstraction has 481 states and 1096 transitions. [2019-11-16 00:29:16,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-16 00:29:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1096 transitions. [2019-11-16 00:29:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-16 00:29:16,729 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:16,729 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:16,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:16,933 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash 544491342, now seen corresponding path program 10 times [2019-11-16 00:29:16,933 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:16,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647735957] [2019-11-16 00:29:16,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:16,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:16,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:17,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647735957] [2019-11-16 00:29:17,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266775483] [2019-11-16 00:29:17,168 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:17,257 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:29:17,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:17,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-16 00:29:17,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:17,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:17,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:17,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:17,315 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:17,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-16 00:29:17,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107712080] [2019-11-16 00:29:17,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-16 00:29:17,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-16 00:29:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-16 00:29:17,317 INFO L87 Difference]: Start difference. First operand 481 states and 1096 transitions. Second operand 18 states. [2019-11-16 00:29:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:17,711 INFO L93 Difference]: Finished difference Result 1062 states and 2405 transitions. [2019-11-16 00:29:17,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-16 00:29:17,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-11-16 00:29:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:17,716 INFO L225 Difference]: With dead ends: 1062 [2019-11-16 00:29:17,716 INFO L226 Difference]: Without dead ends: 767 [2019-11-16 00:29:17,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=810, Unknown=0, NotChecked=0, Total=1122 [2019-11-16 00:29:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-11-16 00:29:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 500. [2019-11-16 00:29:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-11-16 00:29:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1134 transitions. [2019-11-16 00:29:17,733 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1134 transitions. Word has length 69 [2019-11-16 00:29:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:17,733 INFO L462 AbstractCegarLoop]: Abstraction has 500 states and 1134 transitions. [2019-11-16 00:29:17,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-16 00:29:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1134 transitions. [2019-11-16 00:29:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-16 00:29:17,734 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:17,735 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] [2019-11-16 00:29:17,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:17,941 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash -636577263, now seen corresponding path program 11 times [2019-11-16 00:29:17,941 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:17,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381856035] [2019-11-16 00:29:17,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:17,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:17,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:18,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381856035] [2019-11-16 00:29:18,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487991694] [2019-11-16 00:29:18,188 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:18,275 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-16 00:29:18,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:18,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-16 00:29:18,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:18,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:18,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:18,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:18,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:18,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-16 00:29:18,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422359892] [2019-11-16 00:29:18,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-16 00:29:18,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-16 00:29:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:29:18,324 INFO L87 Difference]: Start difference. First operand 500 states and 1134 transitions. Second operand 19 states. [2019-11-16 00:29:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:18,789 INFO L93 Difference]: Finished difference Result 1078 states and 2437 transitions. [2019-11-16 00:29:18,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-16 00:29:18,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2019-11-16 00:29:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:18,795 INFO L225 Difference]: With dead ends: 1078 [2019-11-16 00:29:18,795 INFO L226 Difference]: Without dead ends: 735 [2019-11-16 00:29:18,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2019-11-16 00:29:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-11-16 00:29:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 489. [2019-11-16 00:29:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2019-11-16 00:29:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1112 transitions. [2019-11-16 00:29:18,814 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1112 transitions. Word has length 73 [2019-11-16 00:29:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:18,815 INFO L462 AbstractCegarLoop]: Abstraction has 489 states and 1112 transitions. [2019-11-16 00:29:18,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-16 00:29:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1112 transitions. [2019-11-16 00:29:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-16 00:29:18,816 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:18,817 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] [2019-11-16 00:29:19,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:19,029 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -934989010, now seen corresponding path program 12 times [2019-11-16 00:29:19,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:19,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892270803] [2019-11-16 00:29:19,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:19,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:19,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:19,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892270803] [2019-11-16 00:29:19,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373030458] [2019-11-16 00:29:19,250 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:19,335 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-16 00:29:19,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:19,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-16 00:29:19,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:19,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:19,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:19,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:19,372 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:19,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-16 00:29:19,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25026472] [2019-11-16 00:29:19,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-16 00:29:19,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:19,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-16 00:29:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:29:19,373 INFO L87 Difference]: Start difference. First operand 489 states and 1112 transitions. Second operand 20 states. [2019-11-16 00:29:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:19,800 INFO L93 Difference]: Finished difference Result 964 states and 2160 transitions. [2019-11-16 00:29:19,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-16 00:29:19,801 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2019-11-16 00:29:19,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:19,806 INFO L225 Difference]: With dead ends: 964 [2019-11-16 00:29:19,806 INFO L226 Difference]: Without dead ends: 751 [2019-11-16 00:29:19,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2019-11-16 00:29:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2019-11-16 00:29:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2019-11-16 00:29:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2019-11-16 00:29:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1150 transitions. [2019-11-16 00:29:19,821 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1150 transitions. Word has length 77 [2019-11-16 00:29:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:19,822 INFO L462 AbstractCegarLoop]: Abstraction has 508 states and 1150 transitions. [2019-11-16 00:29:19,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-16 00:29:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1150 transitions. [2019-11-16 00:29:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-16 00:29:19,823 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:19,824 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] [2019-11-16 00:29:20,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:20,027 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:20,027 INFO L82 PathProgramCache]: Analyzing trace with hash 596513521, now seen corresponding path program 13 times [2019-11-16 00:29:20,027 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:20,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639605339] [2019-11-16 00:29:20,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:20,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:20,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:20,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639605339] [2019-11-16 00:29:20,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979213487] [2019-11-16 00:29:20,277 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:20,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-16 00:29:20,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:20,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:20,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:20,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:20,424 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:20,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-16 00:29:20,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273047702] [2019-11-16 00:29:20,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-16 00:29:20,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-16 00:29:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:29:20,425 INFO L87 Difference]: Start difference. First operand 508 states and 1150 transitions. Second operand 21 states. [2019-11-16 00:29:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:20,831 INFO L93 Difference]: Finished difference Result 996 states and 2224 transitions. [2019-11-16 00:29:20,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-16 00:29:20,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-11-16 00:29:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:20,836 INFO L225 Difference]: With dead ends: 996 [2019-11-16 00:29:20,837 INFO L226 Difference]: Without dead ends: 783 [2019-11-16 00:29:20,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1054, Unknown=0, NotChecked=0, Total=1482 [2019-11-16 00:29:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-11-16 00:29:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 521. [2019-11-16 00:29:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2019-11-16 00:29:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1176 transitions. [2019-11-16 00:29:20,852 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1176 transitions. Word has length 81 [2019-11-16 00:29:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:20,852 INFO L462 AbstractCegarLoop]: Abstraction has 521 states and 1176 transitions. [2019-11-16 00:29:20,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-16 00:29:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1176 transitions. [2019-11-16 00:29:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-16 00:29:20,854 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:20,854 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] [2019-11-16 00:29:21,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:21,057 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash 769408782, now seen corresponding path program 14 times [2019-11-16 00:29:21,058 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:21,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935448467] [2019-11-16 00:29:21,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:21,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:21,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:21,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935448467] [2019-11-16 00:29:21,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281862285] [2019-11-16 00:29:21,331 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:21,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:29:21,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:21,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-16 00:29:21,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:21,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:21,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:21,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:21,435 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:21,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-16 00:29:21,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195342325] [2019-11-16 00:29:21,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-16 00:29:21,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-16 00:29:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:29:21,437 INFO L87 Difference]: Start difference. First operand 521 states and 1176 transitions. Second operand 22 states. [2019-11-16 00:29:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:21,883 INFO L93 Difference]: Finished difference Result 1044 states and 2320 transitions. [2019-11-16 00:29:21,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-16 00:29:21,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2019-11-16 00:29:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:21,888 INFO L225 Difference]: With dead ends: 1044 [2019-11-16 00:29:21,888 INFO L226 Difference]: Without dead ends: 855 [2019-11-16 00:29:21,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=1166, Unknown=0, NotChecked=0, Total=1640 [2019-11-16 00:29:21,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2019-11-16 00:29:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 827. [2019-11-16 00:29:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2019-11-16 00:29:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1792 transitions. [2019-11-16 00:29:21,907 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1792 transitions. Word has length 85 [2019-11-16 00:29:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:21,908 INFO L462 AbstractCegarLoop]: Abstraction has 827 states and 1792 transitions. [2019-11-16 00:29:21,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-16 00:29:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1792 transitions. [2019-11-16 00:29:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-16 00:29:21,910 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:21,910 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] [2019-11-16 00:29:22,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:22,113 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1308011473, now seen corresponding path program 15 times [2019-11-16 00:29:22,113 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:22,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922322625] [2019-11-16 00:29:22,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:22,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:22,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:22,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922322625] [2019-11-16 00:29:22,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088536612] [2019-11-16 00:29:22,401 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:22,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-16 00:29:22,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:22,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-16 00:29:22,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:22,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:22,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:22,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:22,538 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:22,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-16 00:29:22,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364676925] [2019-11-16 00:29:22,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-16 00:29:22,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-16 00:29:22,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:29:22,540 INFO L87 Difference]: Start difference. First operand 827 states and 1792 transitions. Second operand 23 states. [2019-11-16 00:29:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:22,998 INFO L93 Difference]: Finished difference Result 1084 states and 2400 transitions. [2019-11-16 00:29:22,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-16 00:29:22,998 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2019-11-16 00:29:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:23,002 INFO L225 Difference]: With dead ends: 1084 [2019-11-16 00:29:23,002 INFO L226 Difference]: Without dead ends: 847 [2019-11-16 00:29:23,003 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1282, Unknown=0, NotChecked=0, Total=1806 [2019-11-16 00:29:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2019-11-16 00:29:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 553. [2019-11-16 00:29:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2019-11-16 00:29:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1240 transitions. [2019-11-16 00:29:23,017 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1240 transitions. Word has length 89 [2019-11-16 00:29:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:23,017 INFO L462 AbstractCegarLoop]: Abstraction has 553 states and 1240 transitions. [2019-11-16 00:29:23,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-16 00:29:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1240 transitions. [2019-11-16 00:29:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-16 00:29:23,019 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:23,019 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] [2019-11-16 00:29:23,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:23,223 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1189516562, now seen corresponding path program 16 times [2019-11-16 00:29:23,223 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:23,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839138210] [2019-11-16 00:29:23,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:23,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:23,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:23,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839138210] [2019-11-16 00:29:23,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435512898] [2019-11-16 00:29:23,478 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:23,568 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:29:23,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:23,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-16 00:29:23,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:23,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:23,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:23,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:23,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:23,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-16 00:29:23,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184440573] [2019-11-16 00:29:23,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-16 00:29:23,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-16 00:29:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-11-16 00:29:23,619 INFO L87 Difference]: Start difference. First operand 553 states and 1240 transitions. Second operand 24 states. [2019-11-16 00:29:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:24,151 INFO L93 Difference]: Finished difference Result 1108 states and 2448 transitions. [2019-11-16 00:29:24,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-16 00:29:24,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2019-11-16 00:29:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:24,156 INFO L225 Difference]: With dead ends: 1108 [2019-11-16 00:29:24,156 INFO L226 Difference]: Without dead ends: 919 [2019-11-16 00:29:24,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2019-11-16 00:29:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2019-11-16 00:29:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 891. [2019-11-16 00:29:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-11-16 00:29:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1920 transitions. [2019-11-16 00:29:24,174 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1920 transitions. Word has length 93 [2019-11-16 00:29:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:24,175 INFO L462 AbstractCegarLoop]: Abstraction has 891 states and 1920 transitions. [2019-11-16 00:29:24,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-16 00:29:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1920 transitions. [2019-11-16 00:29:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-16 00:29:24,177 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:24,177 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:24,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:24,381 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash -299342671, now seen corresponding path program 17 times [2019-11-16 00:29:24,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:24,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692098668] [2019-11-16 00:29:24,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:24,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:24,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:24,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692098668] [2019-11-16 00:29:24,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864121001] [2019-11-16 00:29:24,685 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:24,769 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-16 00:29:24,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:24,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-16 00:29:24,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:24,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:24,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:24,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:24,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:24,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-16 00:29:24,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829043741] [2019-11-16 00:29:24,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-16 00:29:24,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-16 00:29:24,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-11-16 00:29:24,833 INFO L87 Difference]: Start difference. First operand 891 states and 1920 transitions. Second operand 25 states. [2019-11-16 00:29:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:25,347 INFO L93 Difference]: Finished difference Result 1148 states and 2528 transitions. [2019-11-16 00:29:25,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-16 00:29:25,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2019-11-16 00:29:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:25,352 INFO L225 Difference]: With dead ends: 1148 [2019-11-16 00:29:25,352 INFO L226 Difference]: Without dead ends: 959 [2019-11-16 00:29:25,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=1532, Unknown=0, NotChecked=0, Total=2162 [2019-11-16 00:29:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2019-11-16 00:29:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 609. [2019-11-16 00:29:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-11-16 00:29:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1352 transitions. [2019-11-16 00:29:25,367 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1352 transitions. Word has length 97 [2019-11-16 00:29:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:25,367 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 1352 transitions. [2019-11-16 00:29:25,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-16 00:29:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1352 transitions. [2019-11-16 00:29:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-16 00:29:25,369 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:25,369 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] [2019-11-16 00:29:25,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:25,573 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:25,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:25,573 INFO L82 PathProgramCache]: Analyzing trace with hash -237193522, now seen corresponding path program 18 times [2019-11-16 00:29:25,573 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:25,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085657946] [2019-11-16 00:29:25,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:25,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:25,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:25,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085657946] [2019-11-16 00:29:25,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321152319] [2019-11-16 00:29:25,875 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:25,965 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-16 00:29:25,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:25,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-16 00:29:25,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:26,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:26,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:26,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:26,026 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:26,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-16 00:29:26,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891852815] [2019-11-16 00:29:26,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-16 00:29:26,026 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-16 00:29:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-11-16 00:29:26,027 INFO L87 Difference]: Start difference. First operand 609 states and 1352 transitions. Second operand 26 states. [2019-11-16 00:29:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:26,579 INFO L93 Difference]: Finished difference Result 1318 states and 2917 transitions. [2019-11-16 00:29:26,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-16 00:29:26,580 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2019-11-16 00:29:26,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:26,584 INFO L225 Difference]: With dead ends: 1318 [2019-11-16 00:29:26,584 INFO L226 Difference]: Without dead ends: 1023 [2019-11-16 00:29:26,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=696, Invalid=1754, Unknown=0, NotChecked=0, Total=2450 [2019-11-16 00:29:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2019-11-16 00:29:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 628. [2019-11-16 00:29:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-16 00:29:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1390 transitions. [2019-11-16 00:29:26,598 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1390 transitions. Word has length 101 [2019-11-16 00:29:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:26,598 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 1390 transitions. [2019-11-16 00:29:26,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-16 00:29:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1390 transitions. [2019-11-16 00:29:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-16 00:29:26,600 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:26,600 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:26,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:26,803 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:26,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1190969967, now seen corresponding path program 19 times [2019-11-16 00:29:26,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:26,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483137215] [2019-11-16 00:29:26,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:26,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:26,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:27,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483137215] [2019-11-16 00:29:27,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458882567] [2019-11-16 00:29:27,160 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:27,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-16 00:29:27,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:27,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:27,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:27,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:27,280 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:27,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-16 00:29:27,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965372802] [2019-11-16 00:29:27,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-16 00:29:27,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-16 00:29:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:29:27,281 INFO L87 Difference]: Start difference. First operand 628 states and 1390 transitions. Second operand 27 states. [2019-11-16 00:29:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:27,898 INFO L93 Difference]: Finished difference Result 1334 states and 2949 transitions. [2019-11-16 00:29:27,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-16 00:29:27,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2019-11-16 00:29:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:27,903 INFO L225 Difference]: With dead ends: 1334 [2019-11-16 00:29:27,903 INFO L226 Difference]: Without dead ends: 991 [2019-11-16 00:29:27,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=1896, Unknown=0, NotChecked=0, Total=2652 [2019-11-16 00:29:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2019-11-16 00:29:27,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 617. [2019-11-16 00:29:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2019-11-16 00:29:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1368 transitions. [2019-11-16 00:29:27,917 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1368 transitions. Word has length 105 [2019-11-16 00:29:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:27,917 INFO L462 AbstractCegarLoop]: Abstraction has 617 states and 1368 transitions. [2019-11-16 00:29:27,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-16 00:29:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1368 transitions. [2019-11-16 00:29:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-16 00:29:27,919 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:27,919 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:28,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:28,123 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:28,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2147081554, now seen corresponding path program 20 times [2019-11-16 00:29:28,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:28,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045621179] [2019-11-16 00:29:28,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:28,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:28,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:28,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045621179] [2019-11-16 00:29:28,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958735327] [2019-11-16 00:29:28,495 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:28,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:29:28,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:28,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-16 00:29:28,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:28,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:28,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:28,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:28,625 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:28,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-16 00:29:28,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819252198] [2019-11-16 00:29:28,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-16 00:29:28,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:28,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-16 00:29:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2019-11-16 00:29:28,626 INFO L87 Difference]: Start difference. First operand 617 states and 1368 transitions. Second operand 28 states. [2019-11-16 00:29:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:29,195 INFO L93 Difference]: Finished difference Result 1220 states and 2672 transitions. [2019-11-16 00:29:29,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-16 00:29:29,196 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2019-11-16 00:29:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:29,200 INFO L225 Difference]: With dead ends: 1220 [2019-11-16 00:29:29,200 INFO L226 Difference]: Without dead ends: 1007 [2019-11-16 00:29:29,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=1949, Unknown=0, NotChecked=0, Total=2756 [2019-11-16 00:29:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2019-11-16 00:29:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 636. [2019-11-16 00:29:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-16 00:29:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1406 transitions. [2019-11-16 00:29:29,213 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1406 transitions. Word has length 109 [2019-11-16 00:29:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:29,213 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1406 transitions. [2019-11-16 00:29:29,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-16 00:29:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1406 transitions. [2019-11-16 00:29:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-16 00:29:29,215 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:29,215 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:29,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:29,419 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2090387855, now seen corresponding path program 21 times [2019-11-16 00:29:29,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:29,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107307502] [2019-11-16 00:29:29,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:29,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:29,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:29,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107307502] [2019-11-16 00:29:29,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950318898] [2019-11-16 00:29:29,913 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/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 [2019-11-16 00:29:30,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-16 00:29:30,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:30,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-16 00:29:30,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:30,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:30,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:30,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:30,110 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:30,110 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-16 00:29:30,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804525927] [2019-11-16 00:29:30,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-16 00:29:30,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-16 00:29:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2019-11-16 00:29:30,112 INFO L87 Difference]: Start difference. First operand 636 states and 1406 transitions. Second operand 29 states. [2019-11-16 00:29:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:30,932 INFO L93 Difference]: Finished difference Result 1280 states and 2792 transitions. [2019-11-16 00:29:30,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-16 00:29:30,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2019-11-16 00:29:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:30,939 INFO L225 Difference]: With dead ends: 1280 [2019-11-16 00:29:30,939 INFO L226 Difference]: Without dead ends: 1091 [2019-11-16 00:29:30,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=872, Invalid=2098, Unknown=0, NotChecked=0, Total=2970 [2019-11-16 00:29:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2019-11-16 00:29:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1051. [2019-11-16 00:29:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-11-16 00:29:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2240 transitions. [2019-11-16 00:29:30,960 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2240 transitions. Word has length 113 [2019-11-16 00:29:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:30,960 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 2240 transitions. [2019-11-16 00:29:30,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-16 00:29:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2240 transitions. [2019-11-16 00:29:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-16 00:29:30,962 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:30,963 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:31,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:31,166 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash 729132686, now seen corresponding path program 22 times [2019-11-16 00:29:31,167 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:31,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698560218] [2019-11-16 00:29:31,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:31,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:31,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:31,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698560218] [2019-11-16 00:29:31,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358444973] [2019-11-16 00:29:31,660 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:31,755 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:29:31,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:31,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-16 00:29:31,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:31,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:31,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:31,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:31,804 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:31,804 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-16 00:29:31,804 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982000552] [2019-11-16 00:29:31,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-16 00:29:31,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:31,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-16 00:29:31,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-11-16 00:29:31,805 INFO L87 Difference]: Start difference. First operand 1051 states and 2240 transitions. Second operand 30 states. [2019-11-16 00:29:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:32,512 INFO L93 Difference]: Finished difference Result 1308 states and 2848 transitions. [2019-11-16 00:29:32,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-16 00:29:32,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2019-11-16 00:29:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:32,518 INFO L225 Difference]: With dead ends: 1308 [2019-11-16 00:29:32,519 INFO L226 Difference]: Without dead ends: 1095 [2019-11-16 00:29:32,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=2254, Unknown=0, NotChecked=0, Total=3192 [2019-11-16 00:29:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2019-11-16 00:29:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1083. [2019-11-16 00:29:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1083 states. [2019-11-16 00:29:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2304 transitions. [2019-11-16 00:29:32,539 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2304 transitions. Word has length 117 [2019-11-16 00:29:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:32,539 INFO L462 AbstractCegarLoop]: Abstraction has 1083 states and 2304 transitions. [2019-11-16 00:29:32,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-16 00:29:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2304 transitions. [2019-11-16 00:29:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-16 00:29:32,541 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:32,555 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:32,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:32,756 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1110724433, now seen corresponding path program 23 times [2019-11-16 00:29:32,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:32,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279723886] [2019-11-16 00:29:32,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:32,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:32,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:33,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279723886] [2019-11-16 00:29:33,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904939008] [2019-11-16 00:29:33,427 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:33,569 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-16 00:29:33,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:33,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-16 00:29:33,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:33,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:33,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:33,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:33,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:33,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-16 00:29:33,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089573684] [2019-11-16 00:29:33,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-16 00:29:33,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:33,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-16 00:29:33,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2019-11-16 00:29:33,631 INFO L87 Difference]: Start difference. First operand 1083 states and 2304 transitions. Second operand 31 states. [2019-11-16 00:29:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:34,519 INFO L93 Difference]: Finished difference Result 1438 states and 3157 transitions. [2019-11-16 00:29:34,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-16 00:29:34,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2019-11-16 00:29:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:34,523 INFO L225 Difference]: With dead ends: 1438 [2019-11-16 00:29:34,523 INFO L226 Difference]: Without dead ends: 1119 [2019-11-16 00:29:34,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1018, Invalid=2522, Unknown=0, NotChecked=0, Total=3540 [2019-11-16 00:29:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2019-11-16 00:29:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 681. [2019-11-16 00:29:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2019-11-16 00:29:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1496 transitions. [2019-11-16 00:29:34,539 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1496 transitions. Word has length 121 [2019-11-16 00:29:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:34,539 INFO L462 AbstractCegarLoop]: Abstraction has 681 states and 1496 transitions. [2019-11-16 00:29:34,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-16 00:29:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1496 transitions. [2019-11-16 00:29:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-16 00:29:34,541 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:34,541 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:34,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:34,746 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:34,746 INFO L82 PathProgramCache]: Analyzing trace with hash -603235730, now seen corresponding path program 24 times [2019-11-16 00:29:34,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:34,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491516828] [2019-11-16 00:29:34,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:34,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:34,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:35,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491516828] [2019-11-16 00:29:35,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683144405] [2019-11-16 00:29:35,243 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:35,373 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-16 00:29:35,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:35,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-16 00:29:35,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:35,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:35,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:35,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:35,421 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:35,421 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-16 00:29:35,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335970936] [2019-11-16 00:29:35,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-16 00:29:35,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-16 00:29:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2019-11-16 00:29:35,422 INFO L87 Difference]: Start difference. First operand 681 states and 1496 transitions. Second operand 32 states. [2019-11-16 00:29:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:36,176 INFO L93 Difference]: Finished difference Result 1364 states and 2960 transitions. [2019-11-16 00:29:36,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-16 00:29:36,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2019-11-16 00:29:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:36,180 INFO L225 Difference]: With dead ends: 1364 [2019-11-16 00:29:36,180 INFO L226 Difference]: Without dead ends: 1175 [2019-11-16 00:29:36,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1079, Invalid=2581, Unknown=0, NotChecked=0, Total=3660 [2019-11-16 00:29:36,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2019-11-16 00:29:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1147. [2019-11-16 00:29:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2019-11-16 00:29:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 2432 transitions. [2019-11-16 00:29:36,201 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 2432 transitions. Word has length 125 [2019-11-16 00:29:36,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:36,202 INFO L462 AbstractCegarLoop]: Abstraction has 1147 states and 2432 transitions. [2019-11-16 00:29:36,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-16 00:29:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 2432 transitions. [2019-11-16 00:29:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-16 00:29:36,204 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:36,204 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:36,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:36,408 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:36,409 INFO L82 PathProgramCache]: Analyzing trace with hash 172656689, now seen corresponding path program 25 times [2019-11-16 00:29:36,409 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:36,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149603259] [2019-11-16 00:29:36,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:36,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:36,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:36,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149603259] [2019-11-16 00:29:36,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138962410] [2019-11-16 00:29:36,964 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:37,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-16 00:29:37,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:37,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:37,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:37,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:37,147 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:37,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-16 00:29:37,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091009266] [2019-11-16 00:29:37,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-16 00:29:37,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-16 00:29:37,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2019-11-16 00:29:37,149 INFO L87 Difference]: Start difference. First operand 1147 states and 2432 transitions. Second operand 33 states. [2019-11-16 00:29:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:38,002 INFO L93 Difference]: Finished difference Result 1404 states and 3040 transitions. [2019-11-16 00:29:38,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-16 00:29:38,003 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2019-11-16 00:29:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:38,005 INFO L225 Difference]: With dead ends: 1404 [2019-11-16 00:29:38,005 INFO L226 Difference]: Without dead ends: 1167 [2019-11-16 00:29:38,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1154, Invalid=2752, Unknown=0, NotChecked=0, Total=3906 [2019-11-16 00:29:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2019-11-16 00:29:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 713. [2019-11-16 00:29:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2019-11-16 00:29:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1560 transitions. [2019-11-16 00:29:38,020 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1560 transitions. Word has length 129 [2019-11-16 00:29:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:38,020 INFO L462 AbstractCegarLoop]: Abstraction has 713 states and 1560 transitions. [2019-11-16 00:29:38,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-16 00:29:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1560 transitions. [2019-11-16 00:29:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-16 00:29:38,022 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:38,022 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:38,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:38,226 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1717098930, now seen corresponding path program 26 times [2019-11-16 00:29:38,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:38,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545849691] [2019-11-16 00:29:38,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:38,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:38,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:38,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545849691] [2019-11-16 00:29:38,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601776993] [2019-11-16 00:29:38,921 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:39,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:29:39,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:39,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-16 00:29:39,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:39,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:39,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:39,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:39,099 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:39,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-16 00:29:39,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449238823] [2019-11-16 00:29:39,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-16 00:29:39,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-16 00:29:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2019-11-16 00:29:39,101 INFO L87 Difference]: Start difference. First operand 713 states and 1560 transitions. Second operand 34 states. [2019-11-16 00:29:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:40,068 INFO L93 Difference]: Finished difference Result 1428 states and 3088 transitions. [2019-11-16 00:29:40,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-16 00:29:40,068 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2019-11-16 00:29:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:40,070 INFO L225 Difference]: With dead ends: 1428 [2019-11-16 00:29:40,070 INFO L226 Difference]: Without dead ends: 1239 [2019-11-16 00:29:40,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2019-11-16 00:29:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2019-11-16 00:29:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1211. [2019-11-16 00:29:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2019-11-16 00:29:40,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2560 transitions. [2019-11-16 00:29:40,089 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2560 transitions. Word has length 133 [2019-11-16 00:29:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:40,090 INFO L462 AbstractCegarLoop]: Abstraction has 1211 states and 2560 transitions. [2019-11-16 00:29:40,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-16 00:29:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2560 transitions. [2019-11-16 00:29:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-16 00:29:40,092 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:40,093 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:40,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:40,296 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash 277471505, now seen corresponding path program 27 times [2019-11-16 00:29:40,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:40,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001920565] [2019-11-16 00:29:40,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:40,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:40,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:40,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001920565] [2019-11-16 00:29:40,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548479981] [2019-11-16 00:29:40,886 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:41,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-16 00:29:41,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:41,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-16 00:29:41,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:41,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:41,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:41,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:41,072 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:41,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-16 00:29:41,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090385388] [2019-11-16 00:29:41,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-16 00:29:41,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-16 00:29:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2019-11-16 00:29:41,074 INFO L87 Difference]: Start difference. First operand 1211 states and 2560 transitions. Second operand 35 states. [2019-11-16 00:29:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:42,092 INFO L93 Difference]: Finished difference Result 1468 states and 3168 transitions. [2019-11-16 00:29:42,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-16 00:29:42,092 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2019-11-16 00:29:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:42,094 INFO L225 Difference]: With dead ends: 1468 [2019-11-16 00:29:42,094 INFO L226 Difference]: Without dead ends: 1279 [2019-11-16 00:29:42,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1310, Invalid=3112, Unknown=0, NotChecked=0, Total=4422 [2019-11-16 00:29:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-11-16 00:29:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 769. [2019-11-16 00:29:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2019-11-16 00:29:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1672 transitions. [2019-11-16 00:29:42,107 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1672 transitions. Word has length 137 [2019-11-16 00:29:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:42,107 INFO L462 AbstractCegarLoop]: Abstraction has 769 states and 1672 transitions. [2019-11-16 00:29:42,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-16 00:29:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1672 transitions. [2019-11-16 00:29:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-16 00:29:42,109 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:42,110 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:42,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:42,313 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1943465426, now seen corresponding path program 28 times [2019-11-16 00:29:42,314 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:42,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654667199] [2019-11-16 00:29:42,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:42,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:42,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:42,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654667199] [2019-11-16 00:29:42,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139017246] [2019-11-16 00:29:42,783 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:42,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:29:42,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:42,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-16 00:29:42,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:42,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:42,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:42,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:42,967 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:42,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-16 00:29:42,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205233915] [2019-11-16 00:29:42,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-16 00:29:42,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-16 00:29:42,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2019-11-16 00:29:42,969 INFO L87 Difference]: Start difference. First operand 769 states and 1672 transitions. Second operand 36 states. [2019-11-16 00:29:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:44,173 INFO L93 Difference]: Finished difference Result 1638 states and 3557 transitions. [2019-11-16 00:29:44,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-16 00:29:44,173 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2019-11-16 00:29:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:44,176 INFO L225 Difference]: With dead ends: 1638 [2019-11-16 00:29:44,176 INFO L226 Difference]: Without dead ends: 1343 [2019-11-16 00:29:44,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1401, Invalid=3429, Unknown=0, NotChecked=0, Total=4830 [2019-11-16 00:29:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2019-11-16 00:29:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 788. [2019-11-16 00:29:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-11-16 00:29:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1710 transitions. [2019-11-16 00:29:44,193 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1710 transitions. Word has length 141 [2019-11-16 00:29:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:44,193 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1710 transitions. [2019-11-16 00:29:44,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-16 00:29:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1710 transitions. [2019-11-16 00:29:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-16 00:29:44,195 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:44,196 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:44,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:44,399 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:44,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1445832207, now seen corresponding path program 29 times [2019-11-16 00:29:44,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:44,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810352473] [2019-11-16 00:29:44,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:44,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:44,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:45,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810352473] [2019-11-16 00:29:45,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965972200] [2019-11-16 00:29:45,132 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:45,275 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-16 00:29:45,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:45,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-16 00:29:45,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:45,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:45,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:45,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:45,326 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:45,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-16 00:29:45,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417827625] [2019-11-16 00:29:45,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-16 00:29:45,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:45,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-16 00:29:45,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2019-11-16 00:29:45,327 INFO L87 Difference]: Start difference. First operand 788 states and 1710 transitions. Second operand 37 states. [2019-11-16 00:29:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:46,359 INFO L93 Difference]: Finished difference Result 1654 states and 3589 transitions. [2019-11-16 00:29:46,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-16 00:29:46,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2019-11-16 00:29:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:46,362 INFO L225 Difference]: With dead ends: 1654 [2019-11-16 00:29:46,362 INFO L226 Difference]: Without dead ends: 1359 [2019-11-16 00:29:46,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1486, Invalid=3626, Unknown=0, NotChecked=0, Total=5112 [2019-11-16 00:29:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2019-11-16 00:29:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 801. [2019-11-16 00:29:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2019-11-16 00:29:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1736 transitions. [2019-11-16 00:29:46,379 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1736 transitions. Word has length 145 [2019-11-16 00:29:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:46,380 INFO L462 AbstractCegarLoop]: Abstraction has 801 states and 1736 transitions. [2019-11-16 00:29:46,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-16 00:29:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1736 transitions. [2019-11-16 00:29:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-16 00:29:46,381 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:46,382 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:46,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:46,586 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash -76472818, now seen corresponding path program 30 times [2019-11-16 00:29:46,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:46,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052290325] [2019-11-16 00:29:46,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:46,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:46,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:47,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052290325] [2019-11-16 00:29:47,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579839908] [2019-11-16 00:29:47,147 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:47,293 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-16 00:29:47,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:47,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-16 00:29:47,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:47,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:47,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:47,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:47,347 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:47,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-16 00:29:47,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092149629] [2019-11-16 00:29:47,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-16 00:29:47,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-16 00:29:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2019-11-16 00:29:47,348 INFO L87 Difference]: Start difference. First operand 801 states and 1736 transitions. Second operand 38 states. [2019-11-16 00:29:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:48,317 INFO L93 Difference]: Finished difference Result 1686 states and 3653 transitions. [2019-11-16 00:29:48,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-16 00:29:48,317 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2019-11-16 00:29:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:48,320 INFO L225 Difference]: With dead ends: 1686 [2019-11-16 00:29:48,320 INFO L226 Difference]: Without dead ends: 1367 [2019-11-16 00:29:48,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1572, Invalid=3830, Unknown=0, NotChecked=0, Total=5402 [2019-11-16 00:29:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2019-11-16 00:29:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1339. [2019-11-16 00:29:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-11-16 00:29:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2816 transitions. [2019-11-16 00:29:48,342 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2816 transitions. Word has length 149 [2019-11-16 00:29:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:48,342 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 2816 transitions. [2019-11-16 00:29:48,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-16 00:29:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2816 transitions. [2019-11-16 00:29:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-16 00:29:48,345 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:48,345 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:48,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:48,549 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:48,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:48,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1258549969, now seen corresponding path program 31 times [2019-11-16 00:29:48,549 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:48,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664343664] [2019-11-16 00:29:48,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:48,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:48,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:49,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664343664] [2019-11-16 00:29:49,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174872089] [2019-11-16 00:29:49,227 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:49,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-16 00:29:49,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:49,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:49,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:49,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:49,447 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:49,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-16 00:29:49,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320600471] [2019-11-16 00:29:49,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-16 00:29:49,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-16 00:29:49,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2019-11-16 00:29:49,448 INFO L87 Difference]: Start difference. First operand 1339 states and 2816 transitions. Second operand 39 states. [2019-11-16 00:29:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:50,573 INFO L93 Difference]: Finished difference Result 1694 states and 3669 transitions. [2019-11-16 00:29:50,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-16 00:29:50,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2019-11-16 00:29:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:50,575 INFO L225 Difference]: With dead ends: 1694 [2019-11-16 00:29:50,575 INFO L226 Difference]: Without dead ends: 1375 [2019-11-16 00:29:50,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1662, Invalid=4038, Unknown=0, NotChecked=0, Total=5700 [2019-11-16 00:29:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2019-11-16 00:29:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 809. [2019-11-16 00:29:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2019-11-16 00:29:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1752 transitions. [2019-11-16 00:29:50,588 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1752 transitions. Word has length 153 [2019-11-16 00:29:50,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:50,588 INFO L462 AbstractCegarLoop]: Abstraction has 809 states and 1752 transitions. [2019-11-16 00:29:50,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-16 00:29:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1752 transitions. [2019-11-16 00:29:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-16 00:29:50,589 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:50,589 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:50,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:50,790 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1331644910, now seen corresponding path program 32 times [2019-11-16 00:29:50,790 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:50,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449032389] [2019-11-16 00:29:50,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:50,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:50,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:51,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449032389] [2019-11-16 00:29:51,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747504506] [2019-11-16 00:29:51,373 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:51,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:29:51,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:51,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-16 00:29:51,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:51,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:51,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:51,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:51,584 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:51,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-16 00:29:51,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968088515] [2019-11-16 00:29:51,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-16 00:29:51,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:51,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-16 00:29:51,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2019-11-16 00:29:51,586 INFO L87 Difference]: Start difference. First operand 809 states and 1752 transitions. Second operand 40 states. [2019-11-16 00:29:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:52,631 INFO L93 Difference]: Finished difference Result 1620 states and 3472 transitions. [2019-11-16 00:29:52,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-16 00:29:52,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2019-11-16 00:29:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:52,633 INFO L225 Difference]: With dead ends: 1620 [2019-11-16 00:29:52,633 INFO L226 Difference]: Without dead ends: 1431 [2019-11-16 00:29:52,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1743, Invalid=4109, Unknown=0, NotChecked=0, Total=5852 [2019-11-16 00:29:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2019-11-16 00:29:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1403. [2019-11-16 00:29:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1403 states. [2019-11-16 00:29:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 2944 transitions. [2019-11-16 00:29:52,648 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 2944 transitions. Word has length 157 [2019-11-16 00:29:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:52,648 INFO L462 AbstractCegarLoop]: Abstraction has 1403 states and 2944 transitions. [2019-11-16 00:29:52,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-16 00:29:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 2944 transitions. [2019-11-16 00:29:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-16 00:29:52,650 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:52,650 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:52,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:52,850 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:52,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1996575823, now seen corresponding path program 33 times [2019-11-16 00:29:52,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:52,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397107532] [2019-11-16 00:29:52,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:52,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:52,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:53,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397107532] [2019-11-16 00:29:53,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251139556] [2019-11-16 00:29:53,505 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:53,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-16 00:29:53,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:53,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-16 00:29:53,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:53,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:53,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:53,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:53,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:53,736 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-16 00:29:53,736 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966399353] [2019-11-16 00:29:53,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-16 00:29:53,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-16 00:29:53,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2019-11-16 00:29:53,739 INFO L87 Difference]: Start difference. First operand 1403 states and 2944 transitions. Second operand 41 states. [2019-11-16 00:29:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:54,864 INFO L93 Difference]: Finished difference Result 1660 states and 3552 transitions. [2019-11-16 00:29:54,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-16 00:29:54,864 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2019-11-16 00:29:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:54,865 INFO L225 Difference]: With dead ends: 1660 [2019-11-16 00:29:54,865 INFO L226 Difference]: Without dead ends: 1423 [2019-11-16 00:29:54,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1838, Invalid=4324, Unknown=0, NotChecked=0, Total=6162 [2019-11-16 00:29:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2019-11-16 00:29:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 841. [2019-11-16 00:29:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2019-11-16 00:29:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1816 transitions. [2019-11-16 00:29:54,876 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1816 transitions. Word has length 161 [2019-11-16 00:29:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:54,877 INFO L462 AbstractCegarLoop]: Abstraction has 841 states and 1816 transitions. [2019-11-16 00:29:54,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-16 00:29:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1816 transitions. [2019-11-16 00:29:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-16 00:29:54,878 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:54,878 INFO L380 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:55,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:55,079 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash 265524686, now seen corresponding path program 34 times [2019-11-16 00:29:55,079 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:55,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675172546] [2019-11-16 00:29:55,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:55,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:55,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:55,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675172546] [2019-11-16 00:29:55,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603429315] [2019-11-16 00:29:55,721 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:55,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:29:55,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:55,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-16 00:29:55,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:55,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:55,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:55,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:55,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:55,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-16 00:29:55,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855961551] [2019-11-16 00:29:55,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-16 00:29:55,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-16 00:29:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2019-11-16 00:29:55,959 INFO L87 Difference]: Start difference. First operand 841 states and 1816 transitions. Second operand 42 states. [2019-11-16 00:29:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:57,105 INFO L93 Difference]: Finished difference Result 1684 states and 3600 transitions. [2019-11-16 00:29:57,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-16 00:29:57,105 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2019-11-16 00:29:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:57,106 INFO L225 Difference]: With dead ends: 1684 [2019-11-16 00:29:57,106 INFO L226 Difference]: Without dead ends: 1495 [2019-11-16 00:29:57,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1934, Invalid=4546, Unknown=0, NotChecked=0, Total=6480 [2019-11-16 00:29:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2019-11-16 00:29:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1467. [2019-11-16 00:29:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1467 states. [2019-11-16 00:29:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 3072 transitions. [2019-11-16 00:29:57,124 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 3072 transitions. Word has length 165 [2019-11-16 00:29:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:57,125 INFO L462 AbstractCegarLoop]: Abstraction has 1467 states and 3072 transitions. [2019-11-16 00:29:57,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-16 00:29:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 3072 transitions. [2019-11-16 00:29:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-16 00:29:57,126 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:57,127 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:57,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:57,327 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash 413303953, now seen corresponding path program 35 times [2019-11-16 00:29:57,328 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:57,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805065942] [2019-11-16 00:29:57,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:57,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:57,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:29:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:57,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805065942] [2019-11-16 00:29:57,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292299343] [2019-11-16 00:29:57,979 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:58,143 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-16 00:29:58,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:29:58,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-16 00:29:58,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:29:58,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:58,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:58,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:29:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:29:58,248 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:29:58,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-16 00:29:58,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064782035] [2019-11-16 00:29:58,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-16 00:29:58,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:29:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-16 00:29:58,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2019-11-16 00:29:58,250 INFO L87 Difference]: Start difference. First operand 1467 states and 3072 transitions. Second operand 43 states. [2019-11-16 00:29:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:29:59,482 INFO L93 Difference]: Finished difference Result 1724 states and 3680 transitions. [2019-11-16 00:29:59,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-16 00:29:59,483 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2019-11-16 00:29:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:29:59,484 INFO L225 Difference]: With dead ends: 1724 [2019-11-16 00:29:59,484 INFO L226 Difference]: Without dead ends: 1535 [2019-11-16 00:29:59,485 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2034, Invalid=4772, Unknown=0, NotChecked=0, Total=6806 [2019-11-16 00:29:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2019-11-16 00:29:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 897. [2019-11-16 00:29:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2019-11-16 00:29:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1928 transitions. [2019-11-16 00:29:59,499 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1928 transitions. Word has length 169 [2019-11-16 00:29:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:29:59,500 INFO L462 AbstractCegarLoop]: Abstraction has 897 states and 1928 transitions. [2019-11-16 00:29:59,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-16 00:29:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1928 transitions. [2019-11-16 00:29:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-16 00:29:59,502 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:29:59,502 INFO L380 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:29:59,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:29:59,706 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:29:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:29:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -458358354, now seen corresponding path program 36 times [2019-11-16 00:29:59,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:29:59,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300580812] [2019-11-16 00:29:59,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:59,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:29:59,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:29:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:00,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300580812] [2019-11-16 00:30:00,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326318137] [2019-11-16 00:30:00,413 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:00,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-16 00:30:00,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:30:00,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-16 00:30:00,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:30:00,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:00,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:00,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:00,689 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:30:00,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-16 00:30:00,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609127331] [2019-11-16 00:30:00,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-16 00:30:00,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-16 00:30:00,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2019-11-16 00:30:00,692 INFO L87 Difference]: Start difference. First operand 897 states and 1928 transitions. Second operand 44 states. [2019-11-16 00:30:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:30:02,062 INFO L93 Difference]: Finished difference Result 1894 states and 4069 transitions. [2019-11-16 00:30:02,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-16 00:30:02,062 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2019-11-16 00:30:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:30:02,063 INFO L225 Difference]: With dead ends: 1894 [2019-11-16 00:30:02,063 INFO L226 Difference]: Without dead ends: 1599 [2019-11-16 00:30:02,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=5165, Unknown=0, NotChecked=0, Total=7310 [2019-11-16 00:30:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2019-11-16 00:30:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 916. [2019-11-16 00:30:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2019-11-16 00:30:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1966 transitions. [2019-11-16 00:30:02,079 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1966 transitions. Word has length 173 [2019-11-16 00:30:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:30:02,080 INFO L462 AbstractCegarLoop]: Abstraction has 916 states and 1966 transitions. [2019-11-16 00:30:02,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-16 00:30:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1966 transitions. [2019-11-16 00:30:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-16 00:30:02,081 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:30:02,081 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:30:02,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:02,282 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:30:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:30:02,282 INFO L82 PathProgramCache]: Analyzing trace with hash -825262735, now seen corresponding path program 37 times [2019-11-16 00:30:02,282 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:30:02,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425666510] [2019-11-16 00:30:02,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:02,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:02,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:30:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:03,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425666510] [2019-11-16 00:30:03,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847624955] [2019-11-16 00:30:03,300 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:03,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-16 00:30:03,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:30:03,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:03,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:03,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:03,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:30:03,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-16 00:30:03,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560014041] [2019-11-16 00:30:03,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-16 00:30:03,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:03,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-16 00:30:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2019-11-16 00:30:03,543 INFO L87 Difference]: Start difference. First operand 916 states and 1966 transitions. Second operand 45 states. [2019-11-16 00:30:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:30:04,890 INFO L93 Difference]: Finished difference Result 1812 states and 3856 transitions. [2019-11-16 00:30:04,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-16 00:30:04,890 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2019-11-16 00:30:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:30:04,892 INFO L225 Difference]: With dead ends: 1812 [2019-11-16 00:30:04,892 INFO L226 Difference]: Without dead ends: 1575 [2019-11-16 00:30:04,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2244, Invalid=5238, Unknown=0, NotChecked=0, Total=7482 [2019-11-16 00:30:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2019-11-16 00:30:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1547. [2019-11-16 00:30:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1547 states. [2019-11-16 00:30:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 3232 transitions. [2019-11-16 00:30:04,907 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 3232 transitions. Word has length 177 [2019-11-16 00:30:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:30:04,907 INFO L462 AbstractCegarLoop]: Abstraction has 1547 states and 3232 transitions. [2019-11-16 00:30:04,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-16 00:30:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 3232 transitions. [2019-11-16 00:30:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-16 00:30:04,910 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:30:04,910 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:30:05,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:05,111 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:30:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:30:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1781625458, now seen corresponding path program 38 times [2019-11-16 00:30:05,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:30:05,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757984072] [2019-11-16 00:30:05,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:05,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:05,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:30:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1425 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:06,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757984072] [2019-11-16 00:30:06,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998942619] [2019-11-16 00:30:06,001 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:06,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:30:06,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:30:06,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-16 00:30:06,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:30:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:30:06,252 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:30:06,252 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2019-11-16 00:30:06,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798118398] [2019-11-16 00:30:06,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-16 00:30:06,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-16 00:30:06,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-11-16 00:30:06,254 INFO L87 Difference]: Start difference. First operand 1547 states and 3232 transitions. Second operand 43 states. [2019-11-16 00:30:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:30:07,056 INFO L93 Difference]: Finished difference Result 13631 states and 27054 transitions. [2019-11-16 00:30:07,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-16 00:30:07,056 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 181 [2019-11-16 00:30:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:30:07,058 INFO L225 Difference]: With dead ends: 13631 [2019-11-16 00:30:07,058 INFO L226 Difference]: Without dead ends: 1535 [2019-11-16 00:30:07,058 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2209, Invalid=4931, Unknown=0, NotChecked=0, Total=7140 [2019-11-16 00:30:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2019-11-16 00:30:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1519. [2019-11-16 00:30:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2019-11-16 00:30:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2985 transitions. [2019-11-16 00:30:07,080 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2985 transitions. Word has length 181 [2019-11-16 00:30:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:30:07,080 INFO L462 AbstractCegarLoop]: Abstraction has 1519 states and 2985 transitions. [2019-11-16 00:30:07,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-16 00:30:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2985 transitions. [2019-11-16 00:30:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-16 00:30:07,083 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:30:07,083 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:30:07,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:07,287 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:30:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:30:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash 877859252, now seen corresponding path program 39 times [2019-11-16 00:30:07,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:30:07,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267705203] [2019-11-16 00:30:07,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:07,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:30:07,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:30:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:30:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1283 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-16 00:30:08,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267705203] [2019-11-16 00:30:08,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673158167] [2019-11-16 00:30:08,020 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:30:08,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-11-16 00:30:08,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:30:08,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-16 00:30:08,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:30:09,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:09,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:09,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:30:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1479 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-16 00:30:09,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:30:09,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 85 [2019-11-16 00:30:09,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369166750] [2019-11-16 00:30:09,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-11-16 00:30:09,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:30:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-11-16 00:30:09,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=6231, Unknown=0, NotChecked=0, Total=7140 [2019-11-16 00:30:09,700 INFO L87 Difference]: Start difference. First operand 1519 states and 2985 transitions. Second operand 85 states. [2019-11-16 00:30:33,035 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2019-11-16 00:30:39,338 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2019-11-16 00:31:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:31:07,715 INFO L93 Difference]: Finished difference Result 13675 states and 25327 transitions. [2019-11-16 00:31:07,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1421 states. [2019-11-16 00:31:07,715 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 181 [2019-11-16 00:31:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:31:07,715 INFO L225 Difference]: With dead ends: 13675 [2019-11-16 00:31:07,716 INFO L226 Difference]: Without dead ends: 0 [2019-11-16 00:31:08,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1640 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 1498 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100094 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=295056, Invalid=1953444, Unknown=0, NotChecked=0, Total=2248500 [2019-11-16 00:31:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-16 00:31:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-16 00:31:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-16 00:31:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-16 00:31:08,039 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 181 [2019-11-16 00:31:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:31:08,039 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-16 00:31:08,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-11-16 00:31:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-16 00:31:08,040 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-16 00:31:08,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:31:08,242 INFO L303 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-16 00:31:08,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:31:08 BasicIcfg [2019-11-16 00:31:08,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:31:08,244 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:31:08,244 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:31:08,245 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:31:08,245 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:29:07" (3/4) ... [2019-11-16 00:31:08,249 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-16 00:31:08,258 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-11-16 00:31:08,258 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-11-16 00:31:08,260 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-16 00:31:08,261 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-16 00:31:08,261 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-16 00:31:08,292 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c174f7d8-c0d6-4828-9337-89cf8155df00/bin/uautomizer/witness.graphml [2019-11-16 00:31:08,292 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:31:08,293 INFO L168 Benchmark]: Toolchain (without parser) took 122311.71 ms. Allocated memory was 1.0 GB in the beginning and 2.5 GB in the end (delta: 1.5 GB). Free memory was 940.7 MB in the beginning and 2.1 GB in the end (delta: -1.2 GB). Peak memory consumption was 284.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:31:08,293 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:31:08,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 577.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -144.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:31:08,294 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:31:08,295 INFO L168 Benchmark]: Boogie Preprocessor took 30.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:31:08,295 INFO L168 Benchmark]: RCFGBuilder took 361.69 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:31:08,295 INFO L168 Benchmark]: TraceAbstraction took 121227.98 ms. Allocated memory was 1.2 GB in the beginning and 2.5 GB in the end (delta: 1.4 GB). Free memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.7 GB. Max. memory is 11.5 GB. [2019-11-16 00:31:08,296 INFO L168 Benchmark]: Witness Printer took 47.87 ms. Allocated memory is still 2.5 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:31:08,298 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 577.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -144.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 61.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 361.69 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 121227.98 ms. Allocated memory was 1.2 GB in the beginning and 2.5 GB in the end (delta: 1.4 GB). Free memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.7 GB. Max. memory is 11.5 GB. * Witness Printer took 47.87 ms. Allocated memory is still 2.5 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 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: 121.1s, OverallIterations: 45, TraceHistogramMax: 21, AutomataDifference: 85.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 3193 SDtfs, 23212 SDslu, 38343 SDs, 0 SdLazy, 10985 SolverSat, 4592 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7764 GetRequests, 4317 SyntacticMatches, 0 SemanticMatches, 3447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121691 ImplicationChecksByTransitivity, 85.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1547occurred in iteration=43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 45 MinimizatonAttempts, 9158 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 20.0s InterpolantComputationTime, 8706 NumberOfCodeBlocks, 8706 NumberOfCodeBlocksAsserted, 307 NumberOfCheckSat, 8620 ConstructedInterpolants, 0 QuantifiedInterpolants, 3206384 SizeOfPredicates, 1021 NumberOfNonLiveVariables, 9848 ConjunctsInSsa, 1143 ConjunctsInUnsatCore, 86 InterpolantComputations, 5 PerfectInterpolantSequences, 4201/42538 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...