./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 0.1.24-678e011 [2019-11-20 05:43:53,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 05:43:53,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 05:43:53,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 05:43:53,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 05:43:53,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 05:43:53,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 05:43:53,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 05:43:53,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 05:43:54,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 05:43:54,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 05:43:54,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 05:43:54,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 05:43:54,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 05:43:54,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 05:43:54,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 05:43:54,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 05:43:54,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 05:43:54,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 05:43:54,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 05:43:54,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 05:43:54,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 05:43:54,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 05:43:54,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 05:43:54,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 05:43:54,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 05:43:54,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 05:43:54,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 05:43:54,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 05:43:54,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 05:43:54,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 05:43:54,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 05:43:54,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 05:43:54,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 05:43:54,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 05:43:54,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 05:43:54,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 05:43:54,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 05:43:54,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 05:43:54,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 05:43:54,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 05:43:54,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 05:43:54,060 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 05:43:54,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 05:43:54,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 05:43:54,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 05:43:54,063 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 05:43:54,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 05:43:54,064 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 05:43:54,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 05:43:54,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 05:43:54,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 05:43:54,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 05:43:54,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 05:43:54,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 05:43:54,066 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 05:43:54,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 05:43:54,066 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 05:43:54,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 05:43:54,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 05:43:54,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 05:43:54,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 05:43:54,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 05:43:54,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 05:43:54,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 05:43:54,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 05:43:54,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 05:43:54,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 05:43:54,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 05:43:54,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 05:43:54,069 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_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:43:54,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 05:43:54,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 05:43:54,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 05:43:54,216 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 05:43:54,216 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 05:43:54,217 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2019-11-20 05:43:54,271 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/data/389776c51/ece2171b7db140d2b079c0c51b0d056c/FLAG02dc174dd [2019-11-20 05:43:54,780 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 05:43:54,781 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/sv-benchmarks/c/pthread/triangular-longest-1.i [2019-11-20 05:43:54,808 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/data/389776c51/ece2171b7db140d2b079c0c51b0d056c/FLAG02dc174dd [2019-11-20 05:43:55,286 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/data/389776c51/ece2171b7db140d2b079c0c51b0d056c [2019-11-20 05:43:55,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 05:43:55,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 05:43:55,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 05:43:55,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 05:43:55,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 05:43:55,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da4909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55, skipping insertion in model container [2019-11-20 05:43:55,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,307 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 05:43:55,350 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 05:43:55,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:43:55,704 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 05:43:55,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:43:55,809 INFO L192 MainTranslator]: Completed translation [2019-11-20 05:43:55,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55 WrapperNode [2019-11-20 05:43:55,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 05:43:55,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 05:43:55,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 05:43:55,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 05:43:55,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 05:43:55,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 05:43:55,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 05:43:55,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 05:43:55,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... [2019-11-20 05:43:55,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 05:43:55,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 05:43:55,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 05:43:55,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 05:43:55,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:43:55,948 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-20 05:43:55,948 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-20 05:43:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-20 05:43:55,949 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-20 05:43:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 05:43:55,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-20 05:43:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 05:43:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 05:43:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-20 05:43:55,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 05:43:55,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 05:43:55,952 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-20 05:43:56,326 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 05:43:56,326 INFO L285 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-20 05:43:56,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:56 BoogieIcfgContainer [2019-11-20 05:43:56,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 05:43:56,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 05:43:56,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 05:43:56,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 05:43:56,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:43:55" (1/3) ... [2019-11-20 05:43:56,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178d778c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:43:56, skipping insertion in model container [2019-11-20 05:43:56,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:43:55" (2/3) ... [2019-11-20 05:43:56,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178d778c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:43:56, skipping insertion in model container [2019-11-20 05:43:56,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:56" (3/3) ... [2019-11-20 05:43:56,334 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-11-20 05:43:56,373 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,373 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,374 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,374 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,374 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,375 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,375 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,375 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,375 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,375 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,376 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,376 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,376 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,376 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,377 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,377 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,377 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,377 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,378 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,378 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,378 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,378 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,378 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,379 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,379 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,379 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,379 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,379 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,380 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,380 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,380 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,380 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,381 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,381 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,381 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,381 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,381 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,382 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,382 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,382 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,382 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,383 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,383 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,383 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,383 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,384 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,384 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,384 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,384 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,385 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,385 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,385 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,385 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,385 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,386 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,386 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,386 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,386 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,387 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,387 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,387 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,387 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,387 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,388 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,388 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,388 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,388 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,389 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,389 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,389 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,389 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,390 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,390 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,390 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,390 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,390 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,391 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,391 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,391 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,391 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,392 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,392 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,392 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,392 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 05:43:56,417 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-20 05:43:56,417 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 05:43:56,425 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 05:43:56,437 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 05:43:56,458 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 05:43:56,458 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 05:43:56,458 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 05:43:56,459 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 05:43:56,459 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 05:43:56,459 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 05:43:56,459 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 05:43:56,459 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 05:43:56,472 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 95 places, 93 transitions [2019-11-20 05:43:57,224 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 8843 states. [2019-11-20 05:43:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states. [2019-11-20 05:43:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 05:43:57,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:43:57,249 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:43:57,250 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:43:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:43:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1140660711, now seen corresponding path program 1 times [2019-11-20 05:43:57,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:43:57,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475568537] [2019-11-20 05:43:57,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:43:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:43:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:43:57,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475568537] [2019-11-20 05:43:57,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:43:57,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 05:43:57,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709174620] [2019-11-20 05:43:57,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 05:43:57,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:43:57,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 05:43:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 05:43:57,599 INFO L87 Difference]: Start difference. First operand 8843 states. Second operand 5 states. [2019-11-20 05:43:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:43:58,141 INFO L93 Difference]: Finished difference Result 15656 states and 45634 transitions. [2019-11-20 05:43:58,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:43:58,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-20 05:43:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:43:58,210 INFO L225 Difference]: With dead ends: 15656 [2019-11-20 05:43:58,210 INFO L226 Difference]: Without dead ends: 4154 [2019-11-20 05:43:58,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:43:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2019-11-20 05:43:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3146. [2019-11-20 05:43:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3146 states. [2019-11-20 05:43:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 8437 transitions. [2019-11-20 05:43:58,546 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 8437 transitions. Word has length 20 [2019-11-20 05:43:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:43:58,548 INFO L462 AbstractCegarLoop]: Abstraction has 3146 states and 8437 transitions. [2019-11-20 05:43:58,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 05:43:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 8437 transitions. [2019-11-20 05:43:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 05:43:58,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:43:58,555 INFO L410 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] [2019-11-20 05:43:58,555 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:43:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:43:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1489054159, now seen corresponding path program 1 times [2019-11-20 05:43:58,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:43:58,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256109237] [2019-11-20 05:43:58,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:43:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:43:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:43:58,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256109237] [2019-11-20 05:43:58,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:43:58,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 05:43:58,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768149118] [2019-11-20 05:43:58,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 05:43:58,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:43:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 05:43:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 05:43:58,721 INFO L87 Difference]: Start difference. First operand 3146 states and 8437 transitions. Second operand 5 states. [2019-11-20 05:43:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:43:58,907 INFO L93 Difference]: Finished difference Result 3839 states and 9823 transitions. [2019-11-20 05:43:58,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 05:43:58,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-20 05:43:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:43:58,926 INFO L225 Difference]: With dead ends: 3839 [2019-11-20 05:43:58,927 INFO L226 Difference]: Without dead ends: 2750 [2019-11-20 05:43:58,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:43:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2019-11-20 05:43:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2606. [2019-11-20 05:43:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2606 states. [2019-11-20 05:43:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 6955 transitions. [2019-11-20 05:43:59,024 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 6955 transitions. Word has length 23 [2019-11-20 05:43:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:43:59,024 INFO L462 AbstractCegarLoop]: Abstraction has 2606 states and 6955 transitions. [2019-11-20 05:43:59,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 05:43:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 6955 transitions. [2019-11-20 05:43:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 05:43:59,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:43:59,027 INFO L410 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] [2019-11-20 05:43:59,027 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:43:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:43:59,028 INFO L82 PathProgramCache]: Analyzing trace with hash 913376083, now seen corresponding path program 1 times [2019-11-20 05:43:59,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:43:59,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565120635] [2019-11-20 05:43:59,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:43:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:43:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:43:59,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565120635] [2019-11-20 05:43:59,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:43:59,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 05:43:59,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816125151] [2019-11-20 05:43:59,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 05:43:59,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:43:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 05:43:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 05:43:59,183 INFO L87 Difference]: Start difference. First operand 2606 states and 6955 transitions. Second operand 5 states. [2019-11-20 05:43:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:43:59,312 INFO L93 Difference]: Finished difference Result 3443 states and 8653 transitions. [2019-11-20 05:43:59,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 05:43:59,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-20 05:43:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:43:59,328 INFO L225 Difference]: With dead ends: 3443 [2019-11-20 05:43:59,329 INFO L226 Difference]: Without dead ends: 2327 [2019-11-20 05:43:59,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:43:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2019-11-20 05:43:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2327. [2019-11-20 05:43:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2327 states. [2019-11-20 05:43:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6025 transitions. [2019-11-20 05:43:59,404 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6025 transitions. Word has length 23 [2019-11-20 05:43:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:43:59,404 INFO L462 AbstractCegarLoop]: Abstraction has 2327 states and 6025 transitions. [2019-11-20 05:43:59,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 05:43:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6025 transitions. [2019-11-20 05:43:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 05:43:59,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:43:59,407 INFO L410 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, 1] [2019-11-20 05:43:59,407 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:43:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:43:59,407 INFO L82 PathProgramCache]: Analyzing trace with hash 597396229, now seen corresponding path program 1 times [2019-11-20 05:43:59,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:43:59,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292634450] [2019-11-20 05:43:59,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:43:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:43:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:43:59,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292634450] [2019-11-20 05:43:59,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:43:59,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 05:43:59,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4607896] [2019-11-20 05:43:59,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:43:59,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:43:59,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:43:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:43:59,535 INFO L87 Difference]: Start difference. First operand 2327 states and 6025 transitions. Second operand 6 states. [2019-11-20 05:43:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:43:59,732 INFO L93 Difference]: Finished difference Result 3650 states and 9112 transitions. [2019-11-20 05:43:59,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:43:59,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-20 05:43:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:43:59,749 INFO L225 Difference]: With dead ends: 3650 [2019-11-20 05:43:59,750 INFO L226 Difference]: Without dead ends: 2498 [2019-11-20 05:43:59,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:43:59,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2019-11-20 05:43:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2408. [2019-11-20 05:43:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2408 states. [2019-11-20 05:43:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 6187 transitions. [2019-11-20 05:43:59,831 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 6187 transitions. Word has length 26 [2019-11-20 05:43:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:43:59,831 INFO L462 AbstractCegarLoop]: Abstraction has 2408 states and 6187 transitions. [2019-11-20 05:43:59,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:43:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 6187 transitions. [2019-11-20 05:43:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 05:43:59,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:43:59,834 INFO L410 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, 1] [2019-11-20 05:43:59,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:43:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:43:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash 570584329, now seen corresponding path program 2 times [2019-11-20 05:43:59,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:43:59,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132008072] [2019-11-20 05:43:59,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:43:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:43:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:43:59,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132008072] [2019-11-20 05:43:59,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:43:59,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 05:43:59,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013777998] [2019-11-20 05:43:59,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:43:59,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:43:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:43:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:43:59,936 INFO L87 Difference]: Start difference. First operand 2408 states and 6187 transitions. Second operand 6 states. [2019-11-20 05:44:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:00,122 INFO L93 Difference]: Finished difference Result 3821 states and 9454 transitions. [2019-11-20 05:44:00,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:44:00,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-20 05:44:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:00,144 INFO L225 Difference]: With dead ends: 3821 [2019-11-20 05:44:00,144 INFO L226 Difference]: Without dead ends: 2642 [2019-11-20 05:44:00,145 INFO L630 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 [2019-11-20 05:44:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2019-11-20 05:44:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2642. [2019-11-20 05:44:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2019-11-20 05:44:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 6637 transitions. [2019-11-20 05:44:00,225 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 6637 transitions. Word has length 26 [2019-11-20 05:44:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:00,225 INFO L462 AbstractCegarLoop]: Abstraction has 2642 states and 6637 transitions. [2019-11-20 05:44:00,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:44:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 6637 transitions. [2019-11-20 05:44:00,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 05:44:00,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:00,228 INFO L410 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, 1] [2019-11-20 05:44:00,228 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:00,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:00,229 INFO L82 PathProgramCache]: Analyzing trace with hash -66636472, now seen corresponding path program 1 times [2019-11-20 05:44:00,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:00,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822470537] [2019-11-20 05:44:00,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:00,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822470537] [2019-11-20 05:44:00,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677910471] [2019-11-20 05:44:00,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:00,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 05:44:00,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:00,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:00,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:00,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:00,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:00,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 05:44:00,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671450789] [2019-11-20 05:44:00,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 05:44:00,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:00,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 05:44:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:44:00,513 INFO L87 Difference]: Start difference. First operand 2642 states and 6637 transitions. Second operand 8 states. [2019-11-20 05:44:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:00,816 INFO L93 Difference]: Finished difference Result 4847 states and 11929 transitions. [2019-11-20 05:44:00,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:44:00,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-20 05:44:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:00,852 INFO L225 Difference]: With dead ends: 4847 [2019-11-20 05:44:00,853 INFO L226 Difference]: Without dead ends: 3146 [2019-11-20 05:44:00,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-20 05:44:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2019-11-20 05:44:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3038. [2019-11-20 05:44:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3038 states. [2019-11-20 05:44:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 7465 transitions. [2019-11-20 05:44:00,957 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 7465 transitions. Word has length 30 [2019-11-20 05:44:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:00,958 INFO L462 AbstractCegarLoop]: Abstraction has 3038 states and 7465 transitions. [2019-11-20 05:44:00,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 05:44:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 7465 transitions. [2019-11-20 05:44:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 05:44:00,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:00,963 INFO L410 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, 1] [2019-11-20 05:44:01,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:01,170 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1891987234, now seen corresponding path program 1 times [2019-11-20 05:44:01,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:01,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994604338] [2019-11-20 05:44:01,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:01,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994604338] [2019-11-20 05:44:01,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757340275] [2019-11-20 05:44:01,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:01,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 05:44:01,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:01,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:01,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:01,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:01,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 05:44:01,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796795837] [2019-11-20 05:44:01,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 05:44:01,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:01,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 05:44:01,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:44:01,398 INFO L87 Difference]: Start difference. First operand 3038 states and 7465 transitions. Second operand 8 states. [2019-11-20 05:44:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:01,620 INFO L93 Difference]: Finished difference Result 4469 states and 10732 transitions. [2019-11-20 05:44:01,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:44:01,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-20 05:44:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:01,629 INFO L225 Difference]: With dead ends: 4469 [2019-11-20 05:44:01,629 INFO L226 Difference]: Without dead ends: 3290 [2019-11-20 05:44:01,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:44:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2019-11-20 05:44:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 3182. [2019-11-20 05:44:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3182 states. [2019-11-20 05:44:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 7753 transitions. [2019-11-20 05:44:01,718 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 7753 transitions. Word has length 30 [2019-11-20 05:44:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:01,718 INFO L462 AbstractCegarLoop]: Abstraction has 3182 states and 7753 transitions. [2019-11-20 05:44:01,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 05:44:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 7753 transitions. [2019-11-20 05:44:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 05:44:01,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:01,724 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:44:01,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:01,930 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash 456639205, now seen corresponding path program 1 times [2019-11-20 05:44:01,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:01,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925507537] [2019-11-20 05:44:01,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:02,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925507537] [2019-11-20 05:44:02,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828667466] [2019-11-20 05:44:02,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:02,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 05:44:02,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:02,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:02,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:02,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:02,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:02,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 05:44:02,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559942074] [2019-11-20 05:44:02,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 05:44:02,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:02,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 05:44:02,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:44:02,144 INFO L87 Difference]: Start difference. First operand 3182 states and 7753 transitions. Second operand 9 states. [2019-11-20 05:44:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:02,394 INFO L93 Difference]: Finished difference Result 5495 states and 13225 transitions. [2019-11-20 05:44:02,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 05:44:02,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-20 05:44:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:02,405 INFO L225 Difference]: With dead ends: 5495 [2019-11-20 05:44:02,406 INFO L226 Difference]: Without dead ends: 3794 [2019-11-20 05:44:02,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:44:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2019-11-20 05:44:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2966. [2019-11-20 05:44:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2966 states. [2019-11-20 05:44:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 7279 transitions. [2019-11-20 05:44:02,499 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 7279 transitions. Word has length 34 [2019-11-20 05:44:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:02,499 INFO L462 AbstractCegarLoop]: Abstraction has 2966 states and 7279 transitions. [2019-11-20 05:44:02,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 05:44:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 7279 transitions. [2019-11-20 05:44:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 05:44:02,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:02,503 INFO L410 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, 1] [2019-11-20 05:44:02,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:02,715 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:02,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1142284712, now seen corresponding path program 2 times [2019-11-20 05:44:02,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:02,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732186142] [2019-11-20 05:44:02,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:02,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732186142] [2019-11-20 05:44:02,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239486586] [2019-11-20 05:44:02,821 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:02,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:44:02,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:02,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 05:44:02,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:02,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:02,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:02,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:02,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:02,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 05:44:02,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810376706] [2019-11-20 05:44:02,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 05:44:02,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 05:44:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:44:02,944 INFO L87 Difference]: Start difference. First operand 2966 states and 7279 transitions. Second operand 9 states. [2019-11-20 05:44:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:03,216 INFO L93 Difference]: Finished difference Result 5117 states and 12028 transitions. [2019-11-20 05:44:03,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:44:03,216 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-20 05:44:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:03,225 INFO L225 Difference]: With dead ends: 5117 [2019-11-20 05:44:03,225 INFO L226 Difference]: Without dead ends: 3830 [2019-11-20 05:44:03,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:44:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2019-11-20 05:44:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3470. [2019-11-20 05:44:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2019-11-20 05:44:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 8329 transitions. [2019-11-20 05:44:03,316 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 8329 transitions. Word has length 38 [2019-11-20 05:44:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:03,316 INFO L462 AbstractCegarLoop]: Abstraction has 3470 states and 8329 transitions. [2019-11-20 05:44:03,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 05:44:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 8329 transitions. [2019-11-20 05:44:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 05:44:03,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:03,325 INFO L410 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, 1] [2019-11-20 05:44:03,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:03,529 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1409902040, now seen corresponding path program 3 times [2019-11-20 05:44:03,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:03,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249941882] [2019-11-20 05:44:03,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:03,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249941882] [2019-11-20 05:44:03,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439424863] [2019-11-20 05:44:03,627 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:03,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 05:44:03,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:03,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 05:44:03,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:03,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:03,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:03,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:03,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:03,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-20 05:44:03,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622365598] [2019-11-20 05:44:03,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:44:03,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:44:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:44:03,746 INFO L87 Difference]: Start difference. First operand 3470 states and 8329 transitions. Second operand 10 states. [2019-11-20 05:44:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:04,128 INFO L93 Difference]: Finished difference Result 5927 states and 14089 transitions. [2019-11-20 05:44:04,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 05:44:04,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-11-20 05:44:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:04,139 INFO L225 Difference]: With dead ends: 5927 [2019-11-20 05:44:04,139 INFO L226 Difference]: Without dead ends: 4226 [2019-11-20 05:44:04,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:44:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2019-11-20 05:44:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3119. [2019-11-20 05:44:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3119 states. [2019-11-20 05:44:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 7591 transitions. [2019-11-20 05:44:04,241 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 7591 transitions. Word has length 38 [2019-11-20 05:44:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:04,242 INFO L462 AbstractCegarLoop]: Abstraction has 3119 states and 7591 transitions. [2019-11-20 05:44:04,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:44:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 7591 transitions. [2019-11-20 05:44:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-20 05:44:04,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:04,247 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:44:04,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:04,451 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:04,451 INFO L82 PathProgramCache]: Analyzing trace with hash -765361595, now seen corresponding path program 4 times [2019-11-20 05:44:04,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:04,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109272546] [2019-11-20 05:44:04,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:04,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109272546] [2019-11-20 05:44:04,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443033762] [2019-11-20 05:44:04,570 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:04,634 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:44:04,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:04,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 05:44:04,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:04,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:04,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:04,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:04,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-20 05:44:04,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129461585] [2019-11-20 05:44:04,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:44:04,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:04,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:44:04,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:44:04,670 INFO L87 Difference]: Start difference. First operand 3119 states and 7591 transitions. Second operand 10 states. [2019-11-20 05:44:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:04,910 INFO L93 Difference]: Finished difference Result 5405 states and 12604 transitions. [2019-11-20 05:44:04,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:44:04,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-11-20 05:44:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:04,923 INFO L225 Difference]: With dead ends: 5405 [2019-11-20 05:44:04,923 INFO L226 Difference]: Without dead ends: 4118 [2019-11-20 05:44:04,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:44:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2019-11-20 05:44:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 3758. [2019-11-20 05:44:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3758 states. [2019-11-20 05:44:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 8905 transitions. [2019-11-20 05:44:05,060 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 8905 transitions. Word has length 42 [2019-11-20 05:44:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:05,060 INFO L462 AbstractCegarLoop]: Abstraction has 3758 states and 8905 transitions. [2019-11-20 05:44:05,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:44:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 8905 transitions. [2019-11-20 05:44:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-20 05:44:05,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:05,066 INFO L410 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, 1] [2019-11-20 05:44:05,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:05,270 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:05,270 INFO L82 PathProgramCache]: Analyzing trace with hash 977418949, now seen corresponding path program 5 times [2019-11-20 05:44:05,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:05,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165598268] [2019-11-20 05:44:05,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:05,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165598268] [2019-11-20 05:44:05,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781884255] [2019-11-20 05:44:05,385 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:05,456 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-11-20 05:44:05,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:05,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:44:05,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:05,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:05,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:05,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:05,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:05,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-20 05:44:05,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370992811] [2019-11-20 05:44:05,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:44:05,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:44:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:44:05,507 INFO L87 Difference]: Start difference. First operand 3758 states and 8905 transitions. Second operand 11 states. [2019-11-20 05:44:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:05,932 INFO L93 Difference]: Finished difference Result 6071 states and 14377 transitions. [2019-11-20 05:44:05,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 05:44:05,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-11-20 05:44:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:05,950 INFO L225 Difference]: With dead ends: 6071 [2019-11-20 05:44:05,951 INFO L226 Difference]: Without dead ends: 3938 [2019-11-20 05:44:05,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2019-11-20 05:44:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2019-11-20 05:44:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3038. [2019-11-20 05:44:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3038 states. [2019-11-20 05:44:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 7423 transitions. [2019-11-20 05:44:06,025 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 7423 transitions. Word has length 42 [2019-11-20 05:44:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:06,025 INFO L462 AbstractCegarLoop]: Abstraction has 3038 states and 7423 transitions. [2019-11-20 05:44:06,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:44:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 7423 transitions. [2019-11-20 05:44:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-20 05:44:06,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:06,029 INFO L410 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, 1] [2019-11-20 05:44:06,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:06,233 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1948458760, now seen corresponding path program 6 times [2019-11-20 05:44:06,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:06,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910401017] [2019-11-20 05:44:06,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:06,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910401017] [2019-11-20 05:44:06,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390477673] [2019-11-20 05:44:06,393 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:06,481 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-20 05:44:06,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:06,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 05:44:06,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:06,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:06,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:06,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:06,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:06,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-20 05:44:06,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299660340] [2019-11-20 05:44:06,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 05:44:06,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 05:44:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:44:06,519 INFO L87 Difference]: Start difference. First operand 3038 states and 7423 transitions. Second operand 12 states. [2019-11-20 05:44:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:06,898 INFO L93 Difference]: Finished difference Result 6143 states and 14521 transitions. [2019-11-20 05:44:06,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 05:44:06,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-20 05:44:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:06,911 INFO L225 Difference]: With dead ends: 6143 [2019-11-20 05:44:06,912 INFO L226 Difference]: Without dead ends: 4226 [2019-11-20 05:44:06,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2019-11-20 05:44:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2019-11-20 05:44:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3191. [2019-11-20 05:44:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3191 states. [2019-11-20 05:44:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 7735 transitions. [2019-11-20 05:44:06,983 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 7735 transitions. Word has length 46 [2019-11-20 05:44:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:06,983 INFO L462 AbstractCegarLoop]: Abstraction has 3191 states and 7735 transitions. [2019-11-20 05:44:06,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 05:44:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 7735 transitions. [2019-11-20 05:44:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 05:44:06,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:06,987 INFO L410 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, 1] [2019-11-20 05:44:07,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:07,191 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash 986108581, now seen corresponding path program 7 times [2019-11-20 05:44:07,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:07,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566958334] [2019-11-20 05:44:07,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:07,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566958334] [2019-11-20 05:44:07,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274182754] [2019-11-20 05:44:07,346 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:07,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 05:44:07,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:07,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:07,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:07,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:07,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:07,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-20 05:44:07,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128392791] [2019-11-20 05:44:07,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 05:44:07,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 05:44:07,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-20 05:44:07,436 INFO L87 Difference]: Start difference. First operand 3191 states and 7735 transitions. Second operand 13 states. [2019-11-20 05:44:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:07,867 INFO L93 Difference]: Finished difference Result 6683 states and 15601 transitions. [2019-11-20 05:44:07,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 05:44:07,870 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-11-20 05:44:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:07,880 INFO L225 Difference]: With dead ends: 6683 [2019-11-20 05:44:07,881 INFO L226 Difference]: Without dead ends: 4982 [2019-11-20 05:44:07,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-11-20 05:44:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2019-11-20 05:44:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 4622. [2019-11-20 05:44:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4622 states. [2019-11-20 05:44:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 10633 transitions. [2019-11-20 05:44:07,967 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 10633 transitions. Word has length 50 [2019-11-20 05:44:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:07,968 INFO L462 AbstractCegarLoop]: Abstraction has 4622 states and 10633 transitions. [2019-11-20 05:44:07,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 05:44:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 10633 transitions. [2019-11-20 05:44:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-20 05:44:07,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:07,973 INFO L410 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, 1] [2019-11-20 05:44:08,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:08,178 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:08,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1433191400, now seen corresponding path program 8 times [2019-11-20 05:44:08,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:08,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492098094] [2019-11-20 05:44:08,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:08,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492098094] [2019-11-20 05:44:08,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546760445] [2019-11-20 05:44:08,406 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:08,470 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:44:08,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:08,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 05:44:08,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:08,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:08,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:08,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:08,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:08,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-20 05:44:08,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385249243] [2019-11-20 05:44:08,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 05:44:08,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:08,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 05:44:08,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:44:08,513 INFO L87 Difference]: Start difference. First operand 4622 states and 10633 transitions. Second operand 14 states. [2019-11-20 05:44:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:08,846 INFO L93 Difference]: Finished difference Result 7079 states and 16393 transitions. [2019-11-20 05:44:08,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 05:44:08,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-20 05:44:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:08,853 INFO L225 Difference]: With dead ends: 7079 [2019-11-20 05:44:08,853 INFO L226 Difference]: Without dead ends: 5378 [2019-11-20 05:44:08,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-11-20 05:44:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5378 states. [2019-11-20 05:44:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5378 to 3695. [2019-11-20 05:44:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3695 states. [2019-11-20 05:44:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3695 states to 3695 states and 8743 transitions. [2019-11-20 05:44:08,929 INFO L78 Accepts]: Start accepts. Automaton has 3695 states and 8743 transitions. Word has length 54 [2019-11-20 05:44:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:08,929 INFO L462 AbstractCegarLoop]: Abstraction has 3695 states and 8743 transitions. [2019-11-20 05:44:08,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 05:44:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3695 states and 8743 transitions. [2019-11-20 05:44:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-20 05:44:08,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:08,934 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 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, 1] [2019-11-20 05:44:09,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:09,137 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash 683987461, now seen corresponding path program 9 times [2019-11-20 05:44:09,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:09,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157606385] [2019-11-20 05:44:09,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:09,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157606385] [2019-11-20 05:44:09,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352254539] [2019-11-20 05:44:09,300 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:09,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 05:44:09,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:09,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 05:44:09,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:09,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:09,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:09,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:09,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:09,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-20 05:44:09,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910526854] [2019-11-20 05:44:09,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 05:44:09,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:09,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 05:44:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:44:09,415 INFO L87 Difference]: Start difference. First operand 3695 states and 8743 transitions. Second operand 14 states. [2019-11-20 05:44:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:09,871 INFO L93 Difference]: Finished difference Result 6557 states and 14908 transitions. [2019-11-20 05:44:09,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 05:44:09,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2019-11-20 05:44:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:09,877 INFO L225 Difference]: With dead ends: 6557 [2019-11-20 05:44:09,877 INFO L226 Difference]: Without dead ends: 5270 [2019-11-20 05:44:09,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2019-11-20 05:44:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2019-11-20 05:44:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4910. [2019-11-20 05:44:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4910 states. [2019-11-20 05:44:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 11209 transitions. [2019-11-20 05:44:09,960 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 11209 transitions. Word has length 58 [2019-11-20 05:44:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:09,960 INFO L462 AbstractCegarLoop]: Abstraction has 4910 states and 11209 transitions. [2019-11-20 05:44:09,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 05:44:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 11209 transitions. [2019-11-20 05:44:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-20 05:44:09,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:09,967 INFO L410 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, 1] [2019-11-20 05:44:10,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:10,170 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1868199291, now seen corresponding path program 10 times [2019-11-20 05:44:10,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:10,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017838443] [2019-11-20 05:44:10,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:10,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017838443] [2019-11-20 05:44:10,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147781735] [2019-11-20 05:44:10,330 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:10,386 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:44:10,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:10,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 05:44:10,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:10,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:10,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:10,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:10,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:10,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-20 05:44:10,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412100195] [2019-11-20 05:44:10,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 05:44:10,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 05:44:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:44:10,415 INFO L87 Difference]: Start difference. First operand 4910 states and 11209 transitions. Second operand 15 states. [2019-11-20 05:44:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:10,949 INFO L93 Difference]: Finished difference Result 7223 states and 16681 transitions. [2019-11-20 05:44:10,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 05:44:10,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-11-20 05:44:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:10,956 INFO L225 Difference]: With dead ends: 7223 [2019-11-20 05:44:10,956 INFO L226 Difference]: Without dead ends: 5090 [2019-11-20 05:44:10,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2019-11-20 05:44:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2019-11-20 05:44:11,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 3614. [2019-11-20 05:44:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3614 states. [2019-11-20 05:44:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3614 states to 3614 states and 8575 transitions. [2019-11-20 05:44:11,030 INFO L78 Accepts]: Start accepts. Automaton has 3614 states and 8575 transitions. Word has length 58 [2019-11-20 05:44:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:11,030 INFO L462 AbstractCegarLoop]: Abstraction has 3614 states and 8575 transitions. [2019-11-20 05:44:11,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 05:44:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3614 states and 8575 transitions. [2019-11-20 05:44:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-20 05:44:11,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:11,040 INFO L410 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, 1] [2019-11-20 05:44:11,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:11,245 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1890814152, now seen corresponding path program 11 times [2019-11-20 05:44:11,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:11,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493440216] [2019-11-20 05:44:11,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:11,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493440216] [2019-11-20 05:44:11,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830195888] [2019-11-20 05:44:11,434 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:11,504 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 05:44:11,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:11,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 05:44:11,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:11,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:11,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:11,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:11,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:11,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-20 05:44:11,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627576025] [2019-11-20 05:44:11,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 05:44:11,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:11,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 05:44:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:44:11,558 INFO L87 Difference]: Start difference. First operand 3614 states and 8575 transitions. Second operand 16 states. [2019-11-20 05:44:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:12,147 INFO L93 Difference]: Finished difference Result 7439 states and 17113 transitions. [2019-11-20 05:44:12,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 05:44:12,154 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-11-20 05:44:12,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:12,159 INFO L225 Difference]: With dead ends: 7439 [2019-11-20 05:44:12,159 INFO L226 Difference]: Without dead ends: 5738 [2019-11-20 05:44:12,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=581, Unknown=0, NotChecked=0, Total=812 [2019-11-20 05:44:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2019-11-20 05:44:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 5486. [2019-11-20 05:44:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2019-11-20 05:44:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 12361 transitions. [2019-11-20 05:44:12,243 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 12361 transitions. Word has length 62 [2019-11-20 05:44:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:12,244 INFO L462 AbstractCegarLoop]: Abstraction has 5486 states and 12361 transitions. [2019-11-20 05:44:12,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 05:44:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 12361 transitions. [2019-11-20 05:44:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-20 05:44:12,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:12,251 INFO L410 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, 1] [2019-11-20 05:44:12,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:12,454 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:12,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:12,454 INFO L82 PathProgramCache]: Analyzing trace with hash -809606555, now seen corresponding path program 12 times [2019-11-20 05:44:12,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:12,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303493026] [2019-11-20 05:44:12,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:12,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303493026] [2019-11-20 05:44:12,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926323720] [2019-11-20 05:44:12,684 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:12,747 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-20 05:44:12,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:12,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 05:44:12,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:12,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:12,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:12,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:12,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:12,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-20 05:44:12,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912683275] [2019-11-20 05:44:12,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 05:44:12,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:12,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 05:44:12,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:44:12,775 INFO L87 Difference]: Start difference. First operand 5486 states and 12361 transitions. Second operand 17 states. [2019-11-20 05:44:13,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:13,199 INFO L93 Difference]: Finished difference Result 7799 states and 17833 transitions. [2019-11-20 05:44:13,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 05:44:13,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-11-20 05:44:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:13,204 INFO L225 Difference]: With dead ends: 7799 [2019-11-20 05:44:13,204 INFO L226 Difference]: Without dead ends: 6098 [2019-11-20 05:44:13,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=664, Unknown=0, NotChecked=0, Total=930 [2019-11-20 05:44:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6098 states. [2019-11-20 05:44:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 4118. [2019-11-20 05:44:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4118 states. [2019-11-20 05:44:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 9583 transitions. [2019-11-20 05:44:13,279 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 9583 transitions. Word has length 66 [2019-11-20 05:44:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:13,280 INFO L462 AbstractCegarLoop]: Abstraction has 4118 states and 9583 transitions. [2019-11-20 05:44:13,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 05:44:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 9583 transitions. [2019-11-20 05:44:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-20 05:44:13,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:13,284 INFO L410 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, 1] [2019-11-20 05:44:13,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:13,488 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1627998936, now seen corresponding path program 13 times [2019-11-20 05:44:13,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:13,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350798400] [2019-11-20 05:44:13,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:13,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350798400] [2019-11-20 05:44:13,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448408261] [2019-11-20 05:44:13,671 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:13,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 05:44:13,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:13,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:13,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:13,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:13,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-20 05:44:13,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417419988] [2019-11-20 05:44:13,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 05:44:13,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 05:44:13,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:44:13,784 INFO L87 Difference]: Start difference. First operand 4118 states and 9583 transitions. Second operand 17 states. [2019-11-20 05:44:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:14,248 INFO L93 Difference]: Finished difference Result 8447 states and 19129 transitions. [2019-11-20 05:44:14,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 05:44:14,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2019-11-20 05:44:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:14,253 INFO L225 Difference]: With dead ends: 8447 [2019-11-20 05:44:14,253 INFO L226 Difference]: Without dead ends: 6638 [2019-11-20 05:44:14,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-20 05:44:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2019-11-20 05:44:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 5882. [2019-11-20 05:44:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5882 states. [2019-11-20 05:44:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5882 states to 5882 states and 13117 transitions. [2019-11-20 05:44:14,346 INFO L78 Accepts]: Start accepts. Automaton has 5882 states and 13117 transitions. Word has length 70 [2019-11-20 05:44:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:14,346 INFO L462 AbstractCegarLoop]: Abstraction has 5882 states and 13117 transitions. [2019-11-20 05:44:14,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 05:44:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5882 states and 13117 transitions. [2019-11-20 05:44:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-20 05:44:14,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:14,354 INFO L410 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, 1] [2019-11-20 05:44:14,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:14,557 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash 184379461, now seen corresponding path program 14 times [2019-11-20 05:44:14,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:14,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942995969] [2019-11-20 05:44:14,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:14,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942995969] [2019-11-20 05:44:14,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717175682] [2019-11-20 05:44:14,809 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:14,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:44:14,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:14,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 05:44:14,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:14,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:14,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:14,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:14,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:14,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-20 05:44:14,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145927854] [2019-11-20 05:44:14,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 05:44:14,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:14,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 05:44:14,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2019-11-20 05:44:14,904 INFO L87 Difference]: Start difference. First operand 5882 states and 13117 transitions. Second operand 19 states. [2019-11-20 05:44:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:15,507 INFO L93 Difference]: Finished difference Result 8447 states and 19129 transitions. [2019-11-20 05:44:15,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 05:44:15,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-11-20 05:44:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:15,512 INFO L225 Difference]: With dead ends: 8447 [2019-11-20 05:44:15,512 INFO L226 Difference]: Without dead ends: 6314 [2019-11-20 05:44:15,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 05:44:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6314 states. [2019-11-20 05:44:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6314 to 6062. [2019-11-20 05:44:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6062 states. [2019-11-20 05:44:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 13513 transitions. [2019-11-20 05:44:15,593 INFO L78 Accepts]: Start accepts. Automaton has 6062 states and 13513 transitions. Word has length 74 [2019-11-20 05:44:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:15,594 INFO L462 AbstractCegarLoop]: Abstraction has 6062 states and 13513 transitions. [2019-11-20 05:44:15,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 05:44:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6062 states and 13513 transitions. [2019-11-20 05:44:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-20 05:44:15,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:15,602 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:44:15,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:15,805 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:15,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1141940677, now seen corresponding path program 15 times [2019-11-20 05:44:15,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:15,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925974733] [2019-11-20 05:44:15,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:16,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925974733] [2019-11-20 05:44:16,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985348345] [2019-11-20 05:44:16,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:16,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-20 05:44:16,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:16,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 05:44:16,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:16,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:16,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:16,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:16,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:16,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-20 05:44:16,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770635603] [2019-11-20 05:44:16,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 05:44:16,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:16,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 05:44:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-20 05:44:16,153 INFO L87 Difference]: Start difference. First operand 6062 states and 13513 transitions. Second operand 18 states. [2019-11-20 05:44:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:16,613 INFO L93 Difference]: Finished difference Result 8519 states and 19273 transitions. [2019-11-20 05:44:16,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 05:44:16,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2019-11-20 05:44:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:16,618 INFO L225 Difference]: With dead ends: 8519 [2019-11-20 05:44:16,618 INFO L226 Difference]: Without dead ends: 6710 [2019-11-20 05:44:16,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 05:44:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2019-11-20 05:44:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 6206. [2019-11-20 05:44:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6206 states. [2019-11-20 05:44:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6206 states to 6206 states and 13801 transitions. [2019-11-20 05:44:16,682 INFO L78 Accepts]: Start accepts. Automaton has 6206 states and 13801 transitions. Word has length 74 [2019-11-20 05:44:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:16,683 INFO L462 AbstractCegarLoop]: Abstraction has 6206 states and 13801 transitions. [2019-11-20 05:44:16,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 05:44:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6206 states and 13801 transitions. [2019-11-20 05:44:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-20 05:44:16,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:16,690 INFO L410 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, 1] [2019-11-20 05:44:16,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:16,894 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2025353864, now seen corresponding path program 16 times [2019-11-20 05:44:16,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:16,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529090508] [2019-11-20 05:44:16,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:17,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529090508] [2019-11-20 05:44:17,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270405588] [2019-11-20 05:44:17,096 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:17,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:44:17,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:17,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 05:44:17,157 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:17,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:17,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:17,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:17,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:17,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-20 05:44:17,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681318991] [2019-11-20 05:44:17,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 05:44:17,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 05:44:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:44:17,196 INFO L87 Difference]: Start difference. First operand 6206 states and 13801 transitions. Second operand 20 states. [2019-11-20 05:44:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:17,879 INFO L93 Difference]: Finished difference Result 8519 states and 19273 transitions. [2019-11-20 05:44:17,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 05:44:17,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-11-20 05:44:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:17,886 INFO L225 Difference]: With dead ends: 8519 [2019-11-20 05:44:17,887 INFO L226 Difference]: Without dead ends: 6602 [2019-11-20 05:44:17,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 05:44:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2019-11-20 05:44:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 6494. [2019-11-20 05:44:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6494 states. [2019-11-20 05:44:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6494 states to 6494 states and 14377 transitions. [2019-11-20 05:44:17,974 INFO L78 Accepts]: Start accepts. Automaton has 6494 states and 14377 transitions. Word has length 78 [2019-11-20 05:44:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:17,976 INFO L462 AbstractCegarLoop]: Abstraction has 6494 states and 14377 transitions. [2019-11-20 05:44:17,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 05:44:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6494 states and 14377 transitions. [2019-11-20 05:44:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-20 05:44:17,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:17,984 INFO L410 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, 1] [2019-11-20 05:44:18,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:18,187 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2115649950, now seen corresponding path program 17 times [2019-11-20 05:44:18,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:18,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370464731] [2019-11-20 05:44:18,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:18,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370464731] [2019-11-20 05:44:18,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467919375] [2019-11-20 05:44:18,382 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:18,441 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-20 05:44:18,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:18,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 05:44:18,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:18,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:18,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:18,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:18,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-20 05:44:18,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731402219] [2019-11-20 05:44:18,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 05:44:18,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 05:44:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:44:18,476 INFO L87 Difference]: Start difference. First operand 6494 states and 14377 transitions. Second operand 20 states. [2019-11-20 05:44:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:19,089 INFO L93 Difference]: Finished difference Result 8807 states and 19849 transitions. [2019-11-20 05:44:19,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 05:44:19,094 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-11-20 05:44:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:19,100 INFO L225 Difference]: With dead ends: 8807 [2019-11-20 05:44:19,100 INFO L226 Difference]: Without dead ends: 6674 [2019-11-20 05:44:19,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 05:44:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2019-11-20 05:44:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4343. [2019-11-20 05:44:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4343 states. [2019-11-20 05:44:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 10039 transitions. [2019-11-20 05:44:19,163 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 10039 transitions. Word has length 78 [2019-11-20 05:44:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:19,163 INFO L462 AbstractCegarLoop]: Abstraction has 4343 states and 10039 transitions. [2019-11-20 05:44:19,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 05:44:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 10039 transitions. [2019-11-20 05:44:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-20 05:44:19,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:19,169 INFO L410 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, 1] [2019-11-20 05:44:19,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:19,372 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash -115445211, now seen corresponding path program 18 times [2019-11-20 05:44:19,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:19,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595632690] [2019-11-20 05:44:19,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:19,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595632690] [2019-11-20 05:44:19,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577790267] [2019-11-20 05:44:19,656 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:19,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-20 05:44:19,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:19,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 05:44:19,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:19,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:19,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:19,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:19,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:19,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-20 05:44:19,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940543430] [2019-11-20 05:44:19,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 05:44:19,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:19,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 05:44:19,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-11-20 05:44:19,752 INFO L87 Difference]: Start difference. First operand 4343 states and 10039 transitions. Second operand 21 states. [2019-11-20 05:44:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:20,463 INFO L93 Difference]: Finished difference Result 8987 states and 20209 transitions. [2019-11-20 05:44:20,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 05:44:20,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-11-20 05:44:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:20,470 INFO L225 Difference]: With dead ends: 8987 [2019-11-20 05:44:20,470 INFO L226 Difference]: Without dead ends: 7286 [2019-11-20 05:44:20,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1054, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 05:44:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2019-11-20 05:44:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 6926. [2019-11-20 05:44:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6926 states. [2019-11-20 05:44:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6926 states to 6926 states and 15241 transitions. [2019-11-20 05:44:20,565 INFO L78 Accepts]: Start accepts. Automaton has 6926 states and 15241 transitions. Word has length 82 [2019-11-20 05:44:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:20,566 INFO L462 AbstractCegarLoop]: Abstraction has 6926 states and 15241 transitions. [2019-11-20 05:44:20,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 05:44:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 6926 states and 15241 transitions. [2019-11-20 05:44:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-20 05:44:20,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:20,575 INFO L410 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, 1] [2019-11-20 05:44:20,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:20,787 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:20,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1194760040, now seen corresponding path program 19 times [2019-11-20 05:44:20,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:20,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954194486] [2019-11-20 05:44:20,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:21,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954194486] [2019-11-20 05:44:21,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315031670] [2019-11-20 05:44:21,056 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:21,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-20 05:44:21,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:21,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:21,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:21,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:21,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:21,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-20 05:44:21,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484875666] [2019-11-20 05:44:21,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 05:44:21,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 05:44:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-20 05:44:21,176 INFO L87 Difference]: Start difference. First operand 6926 states and 15241 transitions. Second operand 22 states. [2019-11-20 05:44:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:21,977 INFO L93 Difference]: Finished difference Result 9383 states and 21001 transitions. [2019-11-20 05:44:21,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 05:44:21,977 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-11-20 05:44:21,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:21,983 INFO L225 Difference]: With dead ends: 9383 [2019-11-20 05:44:21,983 INFO L226 Difference]: Without dead ends: 7682 [2019-11-20 05:44:21,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=474, Invalid=1166, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 05:44:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7682 states. [2019-11-20 05:44:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7682 to 4847. [2019-11-20 05:44:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4847 states. [2019-11-20 05:44:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4847 states to 4847 states and 11047 transitions. [2019-11-20 05:44:22,045 INFO L78 Accepts]: Start accepts. Automaton has 4847 states and 11047 transitions. Word has length 86 [2019-11-20 05:44:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:22,046 INFO L462 AbstractCegarLoop]: Abstraction has 4847 states and 11047 transitions. [2019-11-20 05:44:22,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 05:44:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4847 states and 11047 transitions. [2019-11-20 05:44:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-20 05:44:22,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:22,050 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 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, 1] [2019-11-20 05:44:22,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:22,250 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:22,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1128591749, now seen corresponding path program 20 times [2019-11-20 05:44:22,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:22,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446329164] [2019-11-20 05:44:22,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:22,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446329164] [2019-11-20 05:44:22,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682066411] [2019-11-20 05:44:22,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:22,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:44:22,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:22,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 05:44:22,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:22,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:22,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:22,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:22,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:22,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-20 05:44:22,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112581160] [2019-11-20 05:44:22,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 05:44:22,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:22,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 05:44:22,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2019-11-20 05:44:22,596 INFO L87 Difference]: Start difference. First operand 4847 states and 11047 transitions. Second operand 22 states. [2019-11-20 05:44:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:23,267 INFO L93 Difference]: Finished difference Result 8861 states and 19516 transitions. [2019-11-20 05:44:23,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 05:44:23,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2019-11-20 05:44:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:23,275 INFO L225 Difference]: With dead ends: 8861 [2019-11-20 05:44:23,275 INFO L226 Difference]: Without dead ends: 7574 [2019-11-20 05:44:23,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 05:44:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2019-11-20 05:44:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 7214. [2019-11-20 05:44:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7214 states. [2019-11-20 05:44:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 15817 transitions. [2019-11-20 05:44:23,385 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 15817 transitions. Word has length 90 [2019-11-20 05:44:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:23,386 INFO L462 AbstractCegarLoop]: Abstraction has 7214 states and 15817 transitions. [2019-11-20 05:44:23,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 05:44:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 15817 transitions. [2019-11-20 05:44:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-20 05:44:23,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:23,399 INFO L410 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, 1] [2019-11-20 05:44:23,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:23,603 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1423595003, now seen corresponding path program 21 times [2019-11-20 05:44:23,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:23,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842866760] [2019-11-20 05:44:23,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:24,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842866760] [2019-11-20 05:44:24,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959248308] [2019-11-20 05:44:24,020 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:24,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-20 05:44:24,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:24,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 05:44:24,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:24,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:24,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:24,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:24,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:24,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-20 05:44:24,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268515242] [2019-11-20 05:44:24,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 05:44:24,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 05:44:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-20 05:44:24,132 INFO L87 Difference]: Start difference. First operand 7214 states and 15817 transitions. Second operand 23 states. [2019-11-20 05:44:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:25,051 INFO L93 Difference]: Finished difference Result 9527 states and 21289 transitions. [2019-11-20 05:44:25,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-20 05:44:25,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-11-20 05:44:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:25,060 INFO L225 Difference]: With dead ends: 9527 [2019-11-20 05:44:25,060 INFO L226 Difference]: Without dead ends: 7394 [2019-11-20 05:44:25,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1282, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 05:44:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7394 states. [2019-11-20 05:44:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7394 to 4766. [2019-11-20 05:44:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4766 states. [2019-11-20 05:44:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4766 states to 4766 states and 10879 transitions. [2019-11-20 05:44:25,135 INFO L78 Accepts]: Start accepts. Automaton has 4766 states and 10879 transitions. Word has length 90 [2019-11-20 05:44:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:25,136 INFO L462 AbstractCegarLoop]: Abstraction has 4766 states and 10879 transitions. [2019-11-20 05:44:25,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 05:44:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4766 states and 10879 transitions. [2019-11-20 05:44:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-20 05:44:25,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:25,140 INFO L410 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, 1] [2019-11-20 05:44:25,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:25,344 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash 322034760, now seen corresponding path program 22 times [2019-11-20 05:44:25,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:25,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133791322] [2019-11-20 05:44:25,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:25,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133791322] [2019-11-20 05:44:25,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027776929] [2019-11-20 05:44:25,634 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:25,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:44:25,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:25,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 05:44:25,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:25,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:25,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:25,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:25,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:25,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-20 05:44:25,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120361113] [2019-11-20 05:44:25,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 05:44:25,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 05:44:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-11-20 05:44:25,791 INFO L87 Difference]: Start difference. First operand 4766 states and 10879 transitions. Second operand 24 states. [2019-11-20 05:44:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:26,511 INFO L93 Difference]: Finished difference Result 9599 states and 21433 transitions. [2019-11-20 05:44:26,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 05:44:26,511 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-11-20 05:44:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:26,516 INFO L225 Difference]: With dead ends: 9599 [2019-11-20 05:44:26,517 INFO L226 Difference]: Without dead ends: 7682 [2019-11-20 05:44:26,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 05:44:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7682 states. [2019-11-20 05:44:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7682 to 4919. [2019-11-20 05:44:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4919 states. [2019-11-20 05:44:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 11191 transitions. [2019-11-20 05:44:26,580 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 11191 transitions. Word has length 94 [2019-11-20 05:44:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:26,580 INFO L462 AbstractCegarLoop]: Abstraction has 4919 states and 11191 transitions. [2019-11-20 05:44:26,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 05:44:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 11191 transitions. [2019-11-20 05:44:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-20 05:44:26,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:26,585 INFO L410 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, 1] [2019-11-20 05:44:26,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:26,788 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash -706280987, now seen corresponding path program 23 times [2019-11-20 05:44:26,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:26,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100159744] [2019-11-20 05:44:26,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:27,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100159744] [2019-11-20 05:44:27,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926494301] [2019-11-20 05:44:27,153 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:27,234 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-20 05:44:27,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:27,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 05:44:27,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:27,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:27,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:27,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:27,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:27,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-20 05:44:27,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160102224] [2019-11-20 05:44:27,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 05:44:27,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 05:44:27,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-11-20 05:44:27,280 INFO L87 Difference]: Start difference. First operand 4919 states and 11191 transitions. Second operand 25 states. [2019-11-20 05:44:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:28,319 INFO L93 Difference]: Finished difference Result 10139 states and 22513 transitions. [2019-11-20 05:44:28,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 05:44:28,320 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-11-20 05:44:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:28,328 INFO L225 Difference]: With dead ends: 10139 [2019-11-20 05:44:28,328 INFO L226 Difference]: Without dead ends: 8438 [2019-11-20 05:44:28,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=1532, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 05:44:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8438 states. [2019-11-20 05:44:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8438 to 8078. [2019-11-20 05:44:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8078 states. [2019-11-20 05:44:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8078 states to 8078 states and 17545 transitions. [2019-11-20 05:44:28,431 INFO L78 Accepts]: Start accepts. Automaton has 8078 states and 17545 transitions. Word has length 98 [2019-11-20 05:44:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:28,432 INFO L462 AbstractCegarLoop]: Abstraction has 8078 states and 17545 transitions. [2019-11-20 05:44:28,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 05:44:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8078 states and 17545 transitions. [2019-11-20 05:44:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-20 05:44:28,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:28,439 INFO L410 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, 1] [2019-11-20 05:44:28,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:28,642 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:28,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1651883736, now seen corresponding path program 24 times [2019-11-20 05:44:28,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:28,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939603307] [2019-11-20 05:44:28,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:29,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939603307] [2019-11-20 05:44:29,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049607805] [2019-11-20 05:44:29,096 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:29,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-20 05:44:29,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:29,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 05:44:29,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:29,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:29,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:29,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:29,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:29,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-20 05:44:29,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243387990] [2019-11-20 05:44:29,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 05:44:29,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 05:44:29,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-11-20 05:44:29,233 INFO L87 Difference]: Start difference. First operand 8078 states and 17545 transitions. Second operand 26 states. [2019-11-20 05:44:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:30,314 INFO L93 Difference]: Finished difference Result 10391 states and 23017 transitions. [2019-11-20 05:44:30,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-20 05:44:30,315 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2019-11-20 05:44:30,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:30,321 INFO L225 Difference]: With dead ends: 10391 [2019-11-20 05:44:30,321 INFO L226 Difference]: Without dead ends: 8474 [2019-11-20 05:44:30,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=686, Invalid=1666, Unknown=0, NotChecked=0, Total=2352 [2019-11-20 05:44:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2019-11-20 05:44:30,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 8366. [2019-11-20 05:44:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8366 states. [2019-11-20 05:44:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8366 states to 8366 states and 18121 transitions. [2019-11-20 05:44:30,395 INFO L78 Accepts]: Start accepts. Automaton has 8366 states and 18121 transitions. Word has length 102 [2019-11-20 05:44:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:30,395 INFO L462 AbstractCegarLoop]: Abstraction has 8366 states and 18121 transitions. [2019-11-20 05:44:30,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 05:44:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 8366 states and 18121 transitions. [2019-11-20 05:44:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-20 05:44:30,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:30,400 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 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, 1] [2019-11-20 05:44:30,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:30,601 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1164034373, now seen corresponding path program 25 times [2019-11-20 05:44:30,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:30,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475421774] [2019-11-20 05:44:30,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 383 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:30,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475421774] [2019-11-20 05:44:30,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26763096] [2019-11-20 05:44:30,901 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:30,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 05:44:30,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:30,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:30,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 383 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:31,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:31,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-20 05:44:31,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204422160] [2019-11-20 05:44:31,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 05:44:31,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:31,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 05:44:31,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-11-20 05:44:31,008 INFO L87 Difference]: Start difference. First operand 8366 states and 18121 transitions. Second operand 26 states. [2019-11-20 05:44:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:31,814 INFO L93 Difference]: Finished difference Result 10823 states and 23881 transitions. [2019-11-20 05:44:31,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 05:44:31,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2019-11-20 05:44:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:31,821 INFO L225 Difference]: With dead ends: 10823 [2019-11-20 05:44:31,821 INFO L226 Difference]: Without dead ends: 9014 [2019-11-20 05:44:31,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=662, Invalid=1594, Unknown=0, NotChecked=0, Total=2256 [2019-11-20 05:44:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9014 states. [2019-11-20 05:44:31,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9014 to 8510. [2019-11-20 05:44:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2019-11-20 05:44:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 18409 transitions. [2019-11-20 05:44:31,893 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 18409 transitions. Word has length 106 [2019-11-20 05:44:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:31,893 INFO L462 AbstractCegarLoop]: Abstraction has 8510 states and 18409 transitions. [2019-11-20 05:44:31,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 05:44:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 18409 transitions. [2019-11-20 05:44:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-20 05:44:31,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:31,899 INFO L410 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, 1] [2019-11-20 05:44:32,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:32,102 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -954219000, now seen corresponding path program 26 times [2019-11-20 05:44:32,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:32,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042188903] [2019-11-20 05:44:32,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:32,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042188903] [2019-11-20 05:44:32,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140003285] [2019-11-20 05:44:32,471 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:32,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:44:32,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:32,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-20 05:44:32,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:32,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:32,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:32,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:32,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:32,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-20 05:44:32,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716769205] [2019-11-20 05:44:32,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 05:44:32,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:32,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 05:44:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2019-11-20 05:44:32,616 INFO L87 Difference]: Start difference. First operand 8510 states and 18409 transitions. Second operand 28 states. [2019-11-20 05:44:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:33,624 INFO L93 Difference]: Finished difference Result 10823 states and 23881 transitions. [2019-11-20 05:44:33,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-20 05:44:33,624 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 110 [2019-11-20 05:44:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:33,629 INFO L225 Difference]: With dead ends: 10823 [2019-11-20 05:44:33,629 INFO L226 Difference]: Without dead ends: 8906 [2019-11-20 05:44:33,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=1949, Unknown=0, NotChecked=0, Total=2756 [2019-11-20 05:44:33,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8906 states. [2019-11-20 05:44:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8906 to 8798. [2019-11-20 05:44:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8798 states. [2019-11-20 05:44:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 18985 transitions. [2019-11-20 05:44:33,708 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 18985 transitions. Word has length 110 [2019-11-20 05:44:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:33,709 INFO L462 AbstractCegarLoop]: Abstraction has 8798 states and 18985 transitions. [2019-11-20 05:44:33,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 05:44:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 18985 transitions. [2019-11-20 05:44:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-20 05:44:33,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:33,715 INFO L410 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, 1] [2019-11-20 05:44:33,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:33,917 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash 781917666, now seen corresponding path program 27 times [2019-11-20 05:44:33,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:33,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163848433] [2019-11-20 05:44:33,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:34,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163848433] [2019-11-20 05:44:34,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843740583] [2019-11-20 05:44:34,247 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:34,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-20 05:44:34,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:34,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 05:44:34,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:34,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:34,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:34,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:34,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:34,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-20 05:44:34,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802092380] [2019-11-20 05:44:34,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 05:44:34,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:34,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 05:44:34,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2019-11-20 05:44:34,381 INFO L87 Difference]: Start difference. First operand 8798 states and 18985 transitions. Second operand 28 states. [2019-11-20 05:44:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:35,387 INFO L93 Difference]: Finished difference Result 11111 states and 24457 transitions. [2019-11-20 05:44:35,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-20 05:44:35,388 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 110 [2019-11-20 05:44:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:35,394 INFO L225 Difference]: With dead ends: 11111 [2019-11-20 05:44:35,394 INFO L226 Difference]: Without dead ends: 8978 [2019-11-20 05:44:35,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=2000, Unknown=0, NotChecked=0, Total=2756 [2019-11-20 05:44:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8978 states. [2019-11-20 05:44:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8978 to 5495. [2019-11-20 05:44:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5495 states. [2019-11-20 05:44:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5495 states to 5495 states and 12343 transitions. [2019-11-20 05:44:35,454 INFO L78 Accepts]: Start accepts. Automaton has 5495 states and 12343 transitions. Word has length 110 [2019-11-20 05:44:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:35,455 INFO L462 AbstractCegarLoop]: Abstraction has 5495 states and 12343 transitions. [2019-11-20 05:44:35,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 05:44:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5495 states and 12343 transitions. [2019-11-20 05:44:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-20 05:44:35,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:35,458 INFO L410 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, 1] [2019-11-20 05:44:35,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:35,658 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2062020187, now seen corresponding path program 28 times [2019-11-20 05:44:35,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:35,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135899149] [2019-11-20 05:44:35,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:36,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135899149] [2019-11-20 05:44:36,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863749417] [2019-11-20 05:44:36,103 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:36,170 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:44:36,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:36,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 05:44:36,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:36,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:36,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:36,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:36,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:36,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-20 05:44:36,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334699464] [2019-11-20 05:44:36,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 05:44:36,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 05:44:36,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2019-11-20 05:44:36,222 INFO L87 Difference]: Start difference. First operand 5495 states and 12343 transitions. Second operand 29 states. [2019-11-20 05:44:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:37,269 INFO L93 Difference]: Finished difference Result 11039 states and 24313 transitions. [2019-11-20 05:44:37,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-20 05:44:37,269 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2019-11-20 05:44:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:37,276 INFO L225 Difference]: With dead ends: 11039 [2019-11-20 05:44:37,276 INFO L226 Difference]: Without dead ends: 9122 [2019-11-20 05:44:37,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=872, Invalid=2098, Unknown=0, NotChecked=0, Total=2970 [2019-11-20 05:44:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2019-11-20 05:44:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 5630. [2019-11-20 05:44:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5630 states. [2019-11-20 05:44:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5630 states to 5630 states and 12607 transitions. [2019-11-20 05:44:37,339 INFO L78 Accepts]: Start accepts. Automaton has 5630 states and 12607 transitions. Word has length 114 [2019-11-20 05:44:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:37,339 INFO L462 AbstractCegarLoop]: Abstraction has 5630 states and 12607 transitions. [2019-11-20 05:44:37,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 05:44:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 5630 states and 12607 transitions. [2019-11-20 05:44:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-20 05:44:37,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:37,343 INFO L410 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, 1] [2019-11-20 05:44:37,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:37,547 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:37,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1865258264, now seen corresponding path program 29 times [2019-11-20 05:44:37,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:37,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57234834] [2019-11-20 05:44:37,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:37,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57234834] [2019-11-20 05:44:37,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899402938] [2019-11-20 05:44:37,984 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:38,076 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-20 05:44:38,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:38,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-20 05:44:38,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:38,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:38,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:38,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:38,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:38,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-20 05:44:38,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574721088] [2019-11-20 05:44:38,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-20 05:44:38,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:38,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-20 05:44:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-11-20 05:44:38,135 INFO L87 Difference]: Start difference. First operand 5630 states and 12607 transitions. Second operand 30 states. [2019-11-20 05:44:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:39,333 INFO L93 Difference]: Finished difference Result 11471 states and 25177 transitions. [2019-11-20 05:44:39,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-20 05:44:39,333 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 118 [2019-11-20 05:44:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:39,339 INFO L225 Difference]: With dead ends: 11471 [2019-11-20 05:44:39,339 INFO L226 Difference]: Without dead ends: 9770 [2019-11-20 05:44:39,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=2254, Unknown=0, NotChecked=0, Total=3192 [2019-11-20 05:44:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9770 states. [2019-11-20 05:44:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9770 to 9518. [2019-11-20 05:44:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9518 states. [2019-11-20 05:44:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9518 states to 9518 states and 20425 transitions. [2019-11-20 05:44:39,420 INFO L78 Accepts]: Start accepts. Automaton has 9518 states and 20425 transitions. Word has length 118 [2019-11-20 05:44:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:39,421 INFO L462 AbstractCegarLoop]: Abstraction has 9518 states and 20425 transitions. [2019-11-20 05:44:39,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-20 05:44:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 9518 states and 20425 transitions. [2019-11-20 05:44:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-20 05:44:39,427 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:39,427 INFO L410 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, 1] [2019-11-20 05:44:39,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:39,630 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:39,631 INFO L82 PathProgramCache]: Analyzing trace with hash -783824507, now seen corresponding path program 30 times [2019-11-20 05:44:39,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:39,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547838323] [2019-11-20 05:44:39,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:40,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547838323] [2019-11-20 05:44:40,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473748863] [2019-11-20 05:44:40,071 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:40,167 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 05:44:40,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:40,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 05:44:40,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:40,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:40,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:40,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:40,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:40,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-20 05:44:40,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859778179] [2019-11-20 05:44:40,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-20 05:44:40,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-20 05:44:40,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2019-11-20 05:44:40,245 INFO L87 Difference]: Start difference. First operand 9518 states and 20425 transitions. Second operand 31 states. [2019-11-20 05:44:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:41,402 INFO L93 Difference]: Finished difference Result 11831 states and 25897 transitions. [2019-11-20 05:44:41,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-20 05:44:41,402 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2019-11-20 05:44:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:41,409 INFO L225 Difference]: With dead ends: 11831 [2019-11-20 05:44:41,409 INFO L226 Difference]: Without dead ends: 9698 [2019-11-20 05:44:41,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1008, Invalid=2414, Unknown=0, NotChecked=0, Total=3422 [2019-11-20 05:44:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9698 states. [2019-11-20 05:44:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9698 to 5918. [2019-11-20 05:44:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5918 states. [2019-11-20 05:44:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 13183 transitions. [2019-11-20 05:44:41,476 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 13183 transitions. Word has length 122 [2019-11-20 05:44:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:41,476 INFO L462 AbstractCegarLoop]: Abstraction has 5918 states and 13183 transitions. [2019-11-20 05:44:41,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-20 05:44:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 13183 transitions. [2019-11-20 05:44:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-20 05:44:41,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:41,480 INFO L410 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, 1] [2019-11-20 05:44:41,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:41,680 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash 461516744, now seen corresponding path program 31 times [2019-11-20 05:44:41,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:41,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825590835] [2019-11-20 05:44:41,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:42,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825590835] [2019-11-20 05:44:42,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169403062] [2019-11-20 05:44:42,074 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:42,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-20 05:44:42,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:42,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:42,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:42,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:42,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:42,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-20 05:44:42,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607214446] [2019-11-20 05:44:42,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-20 05:44:42,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:42,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-20 05:44:42,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2019-11-20 05:44:42,248 INFO L87 Difference]: Start difference. First operand 5918 states and 13183 transitions. Second operand 32 states. [2019-11-20 05:44:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:43,680 INFO L93 Difference]: Finished difference Result 12047 states and 26329 transitions. [2019-11-20 05:44:43,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-20 05:44:43,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2019-11-20 05:44:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:43,687 INFO L225 Difference]: With dead ends: 12047 [2019-11-20 05:44:43,687 INFO L226 Difference]: Without dead ends: 10346 [2019-11-20 05:44:43,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1079, Invalid=2581, Unknown=0, NotChecked=0, Total=3660 [2019-11-20 05:44:43,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10346 states. [2019-11-20 05:44:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10346 to 10094. [2019-11-20 05:44:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10094 states. [2019-11-20 05:44:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 21577 transitions. [2019-11-20 05:44:43,778 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 21577 transitions. Word has length 126 [2019-11-20 05:44:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:43,779 INFO L462 AbstractCegarLoop]: Abstraction has 10094 states and 21577 transitions. [2019-11-20 05:44:43,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-20 05:44:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 21577 transitions. [2019-11-20 05:44:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-20 05:44:43,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:43,785 INFO L410 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, 1] [2019-11-20 05:44:43,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:43,985 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:43,986 INFO L82 PathProgramCache]: Analyzing trace with hash 632398181, now seen corresponding path program 32 times [2019-11-20 05:44:43,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:43,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970765111] [2019-11-20 05:44:43,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:44,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970765111] [2019-11-20 05:44:44,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204795382] [2019-11-20 05:44:44,564 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:44,652 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:44:44,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:44,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 05:44:44,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:44,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:44,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:44,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:44,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:44,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-20 05:44:44,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598444419] [2019-11-20 05:44:44,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-20 05:44:44,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-20 05:44:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 05:44:44,727 INFO L87 Difference]: Start difference. First operand 10094 states and 21577 transitions. Second operand 33 states. [2019-11-20 05:44:45,012 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2019-11-20 05:44:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:46,123 INFO L93 Difference]: Finished difference Result 12407 states and 27049 transitions. [2019-11-20 05:44:46,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-20 05:44:46,123 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-11-20 05:44:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:46,131 INFO L225 Difference]: With dead ends: 12407 [2019-11-20 05:44:46,131 INFO L226 Difference]: Without dead ends: 10274 [2019-11-20 05:44:46,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1154, Invalid=2752, Unknown=0, NotChecked=0, Total=3906 [2019-11-20 05:44:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10274 states. [2019-11-20 05:44:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10274 to 6206. [2019-11-20 05:44:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6206 states. [2019-11-20 05:44:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6206 states to 6206 states and 13759 transitions. [2019-11-20 05:44:46,212 INFO L78 Accepts]: Start accepts. Automaton has 6206 states and 13759 transitions. Word has length 130 [2019-11-20 05:44:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:46,213 INFO L462 AbstractCegarLoop]: Abstraction has 6206 states and 13759 transitions. [2019-11-20 05:44:46,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-20 05:44:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 6206 states and 13759 transitions. [2019-11-20 05:44:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-20 05:44:46,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:46,216 INFO L410 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, 1] [2019-11-20 05:44:46,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:46,420 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1475406680, now seen corresponding path program 33 times [2019-11-20 05:44:46,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:46,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618129740] [2019-11-20 05:44:46,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:46,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618129740] [2019-11-20 05:44:46,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200655369] [2019-11-20 05:44:46,859 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:46,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-20 05:44:46,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:46,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-20 05:44:46,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:46,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:46,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:46,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:47,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:47,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-20 05:44:47,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771936024] [2019-11-20 05:44:47,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-20 05:44:47,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-20 05:44:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 05:44:47,006 INFO L87 Difference]: Start difference. First operand 6206 states and 13759 transitions. Second operand 34 states. [2019-11-20 05:44:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:48,249 INFO L93 Difference]: Finished difference Result 12623 states and 27481 transitions. [2019-11-20 05:44:48,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-20 05:44:48,249 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2019-11-20 05:44:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:48,257 INFO L225 Difference]: With dead ends: 12623 [2019-11-20 05:44:48,257 INFO L226 Difference]: Without dead ends: 10922 [2019-11-20 05:44:48,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1230, Invalid=2930, Unknown=0, NotChecked=0, Total=4160 [2019-11-20 05:44:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10922 states. [2019-11-20 05:44:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10922 to 10670. [2019-11-20 05:44:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10670 states. [2019-11-20 05:44:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10670 states to 10670 states and 22729 transitions. [2019-11-20 05:44:48,358 INFO L78 Accepts]: Start accepts. Automaton has 10670 states and 22729 transitions. Word has length 134 [2019-11-20 05:44:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:48,358 INFO L462 AbstractCegarLoop]: Abstraction has 10670 states and 22729 transitions. [2019-11-20 05:44:48,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-20 05:44:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 10670 states and 22729 transitions. [2019-11-20 05:44:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-20 05:44:48,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:48,365 INFO L410 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, 1] [2019-11-20 05:44:48,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:48,566 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash 909482309, now seen corresponding path program 34 times [2019-11-20 05:44:48,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:48,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873790400] [2019-11-20 05:44:48,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:49,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873790400] [2019-11-20 05:44:49,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507430650] [2019-11-20 05:44:49,189 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:49,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:44:49,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:49,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 05:44:49,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:49,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:49,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:49,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:49,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:49,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-20 05:44:49,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418220953] [2019-11-20 05:44:49,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-20 05:44:49,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:49,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-20 05:44:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 05:44:49,320 INFO L87 Difference]: Start difference. First operand 10670 states and 22729 transitions. Second operand 35 states. [2019-11-20 05:44:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:50,739 INFO L93 Difference]: Finished difference Result 12983 states and 28201 transitions. [2019-11-20 05:44:50,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-20 05:44:50,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 138 [2019-11-20 05:44:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:50,747 INFO L225 Difference]: With dead ends: 12983 [2019-11-20 05:44:50,747 INFO L226 Difference]: Without dead ends: 11282 [2019-11-20 05:44:50,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1310, Invalid=3112, Unknown=0, NotChecked=0, Total=4422 [2019-11-20 05:44:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11282 states. [2019-11-20 05:44:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11282 to 6710. [2019-11-20 05:44:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6710 states. [2019-11-20 05:44:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6710 states to 6710 states and 14767 transitions. [2019-11-20 05:44:50,842 INFO L78 Accepts]: Start accepts. Automaton has 6710 states and 14767 transitions. Word has length 138 [2019-11-20 05:44:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:50,843 INFO L462 AbstractCegarLoop]: Abstraction has 6710 states and 14767 transitions. [2019-11-20 05:44:50,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-20 05:44:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 6710 states and 14767 transitions. [2019-11-20 05:44:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-20 05:44:50,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:50,848 INFO L410 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, 1] [2019-11-20 05:44:51,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:51,052 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:51,052 INFO L82 PathProgramCache]: Analyzing trace with hash 796418312, now seen corresponding path program 35 times [2019-11-20 05:44:51,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:51,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820803839] [2019-11-20 05:44:51,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:51,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820803839] [2019-11-20 05:44:51,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45984225] [2019-11-20 05:44:51,647 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:51,743 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-20 05:44:51,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:51,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 05:44:51,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:51,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:51,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:51,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:51,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-20 05:44:51,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393560794] [2019-11-20 05:44:51,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-20 05:44:51,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-20 05:44:51,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 05:44:51,808 INFO L87 Difference]: Start difference. First operand 6710 states and 14767 transitions. Second operand 35 states. [2019-11-20 05:44:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:53,038 INFO L93 Difference]: Finished difference Result 13631 states and 29497 transitions. [2019-11-20 05:44:53,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-20 05:44:53,038 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 142 [2019-11-20 05:44:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:53,046 INFO L225 Difference]: With dead ends: 13631 [2019-11-20 05:44:53,046 INFO L226 Difference]: Without dead ends: 11822 [2019-11-20 05:44:53,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1337, Invalid=3085, Unknown=0, NotChecked=0, Total=4422 [2019-11-20 05:44:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11822 states. [2019-11-20 05:44:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11822 to 11066. [2019-11-20 05:44:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11066 states. [2019-11-20 05:44:53,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11066 states to 11066 states and 23485 transitions. [2019-11-20 05:44:53,147 INFO L78 Accepts]: Start accepts. Automaton has 11066 states and 23485 transitions. Word has length 142 [2019-11-20 05:44:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:53,148 INFO L462 AbstractCegarLoop]: Abstraction has 11066 states and 23485 transitions. [2019-11-20 05:44:53,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-20 05:44:53,148 INFO L276 IsEmpty]: Start isEmpty. Operand 11066 states and 23485 transitions. [2019-11-20 05:44:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-20 05:44:53,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:53,155 INFO L410 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, 1] [2019-11-20 05:44:53,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:53,356 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:53,357 INFO L82 PathProgramCache]: Analyzing trace with hash -385473499, now seen corresponding path program 36 times [2019-11-20 05:44:53,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:53,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680278404] [2019-11-20 05:44:53,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:53,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680278404] [2019-11-20 05:44:53,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673917459] [2019-11-20 05:44:53,916 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:54,001 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-20 05:44:54,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:54,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-20 05:44:54,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:54,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:54,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:54,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:54,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:54,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-20 05:44:54,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738147000] [2019-11-20 05:44:54,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-20 05:44:54,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:54,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-20 05:44:54,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 05:44:54,073 INFO L87 Difference]: Start difference. First operand 11066 states and 23485 transitions. Second operand 37 states. [2019-11-20 05:44:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:55,724 INFO L93 Difference]: Finished difference Result 14765 states and 32206 transitions. [2019-11-20 05:44:55,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-20 05:44:55,725 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2019-11-20 05:44:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:55,733 INFO L225 Difference]: With dead ends: 14765 [2019-11-20 05:44:55,733 INFO L226 Difference]: Without dead ends: 12110 [2019-11-20 05:44:55,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1362, Invalid=3750, Unknown=0, NotChecked=0, Total=5112 [2019-11-20 05:44:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12110 states. [2019-11-20 05:44:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12110 to 11354. [2019-11-20 05:44:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11354 states. [2019-11-20 05:44:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11354 states to 11354 states and 24061 transitions. [2019-11-20 05:44:55,836 INFO L78 Accepts]: Start accepts. Automaton has 11354 states and 24061 transitions. Word has length 146 [2019-11-20 05:44:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:55,836 INFO L462 AbstractCegarLoop]: Abstraction has 11354 states and 24061 transitions. [2019-11-20 05:44:55,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-20 05:44:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 11354 states and 24061 transitions. [2019-11-20 05:44:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-20 05:44:55,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:55,844 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 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, 1] [2019-11-20 05:44:56,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:56,047 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1859319973, now seen corresponding path program 37 times [2019-11-20 05:44:56,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:56,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21831548] [2019-11-20 05:44:56,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 873 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:56,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21831548] [2019-11-20 05:44:56,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004000629] [2019-11-20 05:44:56,544 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:56,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-20 05:44:56,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:56,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:56,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 873 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:44:56,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:56,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-20 05:44:56,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858398210] [2019-11-20 05:44:56,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-20 05:44:56,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-20 05:44:56,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 05:44:56,703 INFO L87 Difference]: Start difference. First operand 11354 states and 24061 transitions. Second operand 36 states. [2019-11-20 05:44:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:44:58,154 INFO L93 Difference]: Finished difference Result 14063 states and 30361 transitions. [2019-11-20 05:44:58,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-20 05:44:58,155 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2019-11-20 05:44:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:44:58,162 INFO L225 Difference]: With dead ends: 14063 [2019-11-20 05:44:58,162 INFO L226 Difference]: Without dead ends: 12254 [2019-11-20 05:44:58,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1357, Invalid=3199, Unknown=0, NotChecked=0, Total=4556 [2019-11-20 05:44:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12254 states. [2019-11-20 05:44:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12254 to 7007. [2019-11-20 05:44:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7007 states. [2019-11-20 05:44:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 15367 transitions. [2019-11-20 05:44:58,238 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 15367 transitions. Word has length 146 [2019-11-20 05:44:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:44:58,238 INFO L462 AbstractCegarLoop]: Abstraction has 7007 states and 15367 transitions. [2019-11-20 05:44:58,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-20 05:44:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 15367 transitions. [2019-11-20 05:44:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-20 05:44:58,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:44:58,242 INFO L410 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, 1] [2019-11-20 05:44:58,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:44:58,443 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:44:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:44:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1138861378, now seen corresponding path program 38 times [2019-11-20 05:44:58,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:44:58,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685608827] [2019-11-20 05:44:58,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:44:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:44:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:58,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685608827] [2019-11-20 05:44:58,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891629824] [2019-11-20 05:44:58,991 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:44:59,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:44:59,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:44:59,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 05:44:59,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:44:59,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:59,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:59,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:44:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:44:59,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:44:59,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-20 05:44:59,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720673772] [2019-11-20 05:44:59,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-20 05:44:59,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:44:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-20 05:44:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 05:44:59,147 INFO L87 Difference]: Start difference. First operand 7007 states and 15367 transitions. Second operand 38 states. [2019-11-20 05:45:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:00,613 INFO L93 Difference]: Finished difference Result 14063 states and 30361 transitions. [2019-11-20 05:45:00,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-20 05:45:00,613 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 150 [2019-11-20 05:45:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:00,621 INFO L225 Difference]: With dead ends: 14063 [2019-11-20 05:45:00,621 INFO L226 Difference]: Without dead ends: 11930 [2019-11-20 05:45:00,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1446, Invalid=3810, Unknown=0, NotChecked=0, Total=5256 [2019-11-20 05:45:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11930 states. [2019-11-20 05:45:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11930 to 11678. [2019-11-20 05:45:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11678 states. [2019-11-20 05:45:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11678 states to 11678 states and 24745 transitions. [2019-11-20 05:45:00,721 INFO L78 Accepts]: Start accepts. Automaton has 11678 states and 24745 transitions. Word has length 150 [2019-11-20 05:45:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:00,721 INFO L462 AbstractCegarLoop]: Abstraction has 11678 states and 24745 transitions. [2019-11-20 05:45:00,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-20 05:45:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 11678 states and 24745 transitions. [2019-11-20 05:45:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-20 05:45:00,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:00,729 INFO L410 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, 1] [2019-11-20 05:45:00,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:00,929 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:00,929 INFO L82 PathProgramCache]: Analyzing trace with hash -133179131, now seen corresponding path program 39 times [2019-11-20 05:45:00,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:00,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525488947] [2019-11-20 05:45:00,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:01,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525488947] [2019-11-20 05:45:01,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009156191] [2019-11-20 05:45:01,453 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/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 [2019-11-20 05:45:01,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-11-20 05:45:01,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:01,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-20 05:45:01,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:01,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:01,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:01,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:01,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:01,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-20 05:45:01,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949391426] [2019-11-20 05:45:01,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-20 05:45:01,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:01,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-20 05:45:01,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 05:45:01,622 INFO L87 Difference]: Start difference. First operand 11678 states and 24745 transitions. Second operand 39 states. [2019-11-20 05:45:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:03,590 INFO L93 Difference]: Finished difference Result 13991 states and 30217 transitions. [2019-11-20 05:45:03,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-20 05:45:03,590 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 154 [2019-11-20 05:45:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:03,601 INFO L225 Difference]: With dead ends: 13991 [2019-11-20 05:45:03,601 INFO L226 Difference]: Without dead ends: 11858 [2019-11-20 05:45:03,602 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1517, Invalid=4033, Unknown=0, NotChecked=0, Total=5550 [2019-11-20 05:45:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11858 states. [2019-11-20 05:45:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11858 to 6935. [2019-11-20 05:45:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6935 states. [2019-11-20 05:45:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6935 states to 6935 states and 15223 transitions. [2019-11-20 05:45:03,696 INFO L78 Accepts]: Start accepts. Automaton has 6935 states and 15223 transitions. Word has length 154 [2019-11-20 05:45:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:03,696 INFO L462 AbstractCegarLoop]: Abstraction has 6935 states and 15223 transitions. [2019-11-20 05:45:03,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-20 05:45:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6935 states and 15223 transitions. [2019-11-20 05:45:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-20 05:45:03,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:03,700 INFO L410 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, 1] [2019-11-20 05:45:03,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:03,900 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash -83105531, now seen corresponding path program 40 times [2019-11-20 05:45:03,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:03,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698619633] [2019-11-20 05:45:03,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:04,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698619633] [2019-11-20 05:45:04,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327944736] [2019-11-20 05:45:04,450 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:04,534 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:45:04,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:04,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 05:45:04,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:04,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:04,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:04,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:04,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:04,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-20 05:45:04,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539450947] [2019-11-20 05:45:04,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-20 05:45:04,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:04,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-20 05:45:04,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 05:45:04,607 INFO L87 Difference]: Start difference. First operand 6935 states and 15223 transitions. Second operand 39 states. [2019-11-20 05:45:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:06,393 INFO L93 Difference]: Finished difference Result 13919 states and 30073 transitions. [2019-11-20 05:45:06,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-20 05:45:06,394 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 154 [2019-11-20 05:45:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:06,402 INFO L225 Difference]: With dead ends: 13919 [2019-11-20 05:45:06,402 INFO L226 Difference]: Without dead ends: 12002 [2019-11-20 05:45:06,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1652, Invalid=3898, Unknown=0, NotChecked=0, Total=5550 [2019-11-20 05:45:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2019-11-20 05:45:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 7070. [2019-11-20 05:45:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7070 states. [2019-11-20 05:45:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 15487 transitions. [2019-11-20 05:45:06,486 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 15487 transitions. Word has length 154 [2019-11-20 05:45:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:06,487 INFO L462 AbstractCegarLoop]: Abstraction has 7070 states and 15487 transitions. [2019-11-20 05:45:06,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-20 05:45:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 15487 transitions. [2019-11-20 05:45:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-20 05:45:06,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:06,491 INFO L410 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, 1] [2019-11-20 05:45:06,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:06,691 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1046183096, now seen corresponding path program 41 times [2019-11-20 05:45:06,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:06,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493561981] [2019-11-20 05:45:06,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:07,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493561981] [2019-11-20 05:45:07,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436933018] [2019-11-20 05:45:07,401 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:07,511 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-20 05:45:07,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:07,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-20 05:45:07,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:07,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:07,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:07,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:07,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:07,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-20 05:45:07,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627110900] [2019-11-20 05:45:07,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-20 05:45:07,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-20 05:45:07,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 05:45:07,589 INFO L87 Difference]: Start difference. First operand 7070 states and 15487 transitions. Second operand 40 states. [2019-11-20 05:45:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:09,227 INFO L93 Difference]: Finished difference Result 14351 states and 30937 transitions. [2019-11-20 05:45:09,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-20 05:45:09,228 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 158 [2019-11-20 05:45:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:09,237 INFO L225 Difference]: With dead ends: 14351 [2019-11-20 05:45:09,237 INFO L226 Difference]: Without dead ends: 12650 [2019-11-20 05:45:09,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1743, Invalid=4109, Unknown=0, NotChecked=0, Total=5852 [2019-11-20 05:45:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12650 states. [2019-11-20 05:45:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12650 to 12398. [2019-11-20 05:45:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12398 states. [2019-11-20 05:45:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12398 states to 12398 states and 26185 transitions. [2019-11-20 05:45:09,350 INFO L78 Accepts]: Start accepts. Automaton has 12398 states and 26185 transitions. Word has length 158 [2019-11-20 05:45:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:09,351 INFO L462 AbstractCegarLoop]: Abstraction has 12398 states and 26185 transitions. [2019-11-20 05:45:09,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-20 05:45:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 12398 states and 26185 transitions. [2019-11-20 05:45:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-20 05:45:09,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:09,359 INFO L410 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, 1] [2019-11-20 05:45:09,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:09,559 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1222754075, now seen corresponding path program 42 times [2019-11-20 05:45:09,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:09,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659700880] [2019-11-20 05:45:09,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:10,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659700880] [2019-11-20 05:45:10,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744319523] [2019-11-20 05:45:10,179 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:10,270 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-11-20 05:45:10,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:10,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 05:45:10,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:10,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:10,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:10,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:10,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:10,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-20 05:45:10,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595495729] [2019-11-20 05:45:10,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-20 05:45:10,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:10,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-20 05:45:10,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 05:45:10,335 INFO L87 Difference]: Start difference. First operand 12398 states and 26185 transitions. Second operand 41 states. [2019-11-20 05:45:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:12,141 INFO L93 Difference]: Finished difference Result 14711 states and 31657 transitions. [2019-11-20 05:45:12,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-20 05:45:12,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 162 [2019-11-20 05:45:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:12,150 INFO L225 Difference]: With dead ends: 14711 [2019-11-20 05:45:12,150 INFO L226 Difference]: Without dead ends: 12578 [2019-11-20 05:45:12,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1838, Invalid=4324, Unknown=0, NotChecked=0, Total=6162 [2019-11-20 05:45:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12578 states. [2019-11-20 05:45:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12578 to 7358. [2019-11-20 05:45:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7358 states. [2019-11-20 05:45:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 16063 transitions. [2019-11-20 05:45:12,232 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 16063 transitions. Word has length 162 [2019-11-20 05:45:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:12,233 INFO L462 AbstractCegarLoop]: Abstraction has 7358 states and 16063 transitions. [2019-11-20 05:45:12,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-20 05:45:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 16063 transitions. [2019-11-20 05:45:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-20 05:45:12,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:12,237 INFO L410 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, 1] [2019-11-20 05:45:12,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:12,437 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:12,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1583736872, now seen corresponding path program 43 times [2019-11-20 05:45:12,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:12,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438161185] [2019-11-20 05:45:12,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:12,618 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2019-11-20 05:45:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:13,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438161185] [2019-11-20 05:45:13,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997649010] [2019-11-20 05:45:13,301 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:13,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-20 05:45:13,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:13,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:13,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:13,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:13,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:13,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-20 05:45:13,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337745809] [2019-11-20 05:45:13,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-20 05:45:13,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-20 05:45:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 05:45:13,445 INFO L87 Difference]: Start difference. First operand 7358 states and 16063 transitions. Second operand 42 states. [2019-11-20 05:45:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:15,111 INFO L93 Difference]: Finished difference Result 14927 states and 32089 transitions. [2019-11-20 05:45:15,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-20 05:45:15,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2019-11-20 05:45:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:15,120 INFO L225 Difference]: With dead ends: 14927 [2019-11-20 05:45:15,120 INFO L226 Difference]: Without dead ends: 13226 [2019-11-20 05:45:15,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1934, Invalid=4546, Unknown=0, NotChecked=0, Total=6480 [2019-11-20 05:45:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13226 states. [2019-11-20 05:45:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13226 to 12974. [2019-11-20 05:45:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12974 states. [2019-11-20 05:45:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12974 states to 12974 states and 27337 transitions. [2019-11-20 05:45:15,245 INFO L78 Accepts]: Start accepts. Automaton has 12974 states and 27337 transitions. Word has length 166 [2019-11-20 05:45:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:15,246 INFO L462 AbstractCegarLoop]: Abstraction has 12974 states and 27337 transitions. [2019-11-20 05:45:15,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-20 05:45:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 12974 states and 27337 transitions. [2019-11-20 05:45:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-20 05:45:15,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:15,254 INFO L410 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, 1] [2019-11-20 05:45:15,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:15,454 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:15,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:15,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1053472965, now seen corresponding path program 44 times [2019-11-20 05:45:15,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:15,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608303729] [2019-11-20 05:45:15,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:16,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608303729] [2019-11-20 05:45:16,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109826322] [2019-11-20 05:45:16,084 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:16,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:45:16,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:16,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-20 05:45:16,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:16,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:16,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:16,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:16,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:16,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-20 05:45:16,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510830045] [2019-11-20 05:45:16,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 05:45:16,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 05:45:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 05:45:16,292 INFO L87 Difference]: Start difference. First operand 12974 states and 27337 transitions. Second operand 43 states. [2019-11-20 05:45:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:18,131 INFO L93 Difference]: Finished difference Result 15287 states and 32809 transitions. [2019-11-20 05:45:18,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-20 05:45:18,132 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 170 [2019-11-20 05:45:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:18,142 INFO L225 Difference]: With dead ends: 15287 [2019-11-20 05:45:18,142 INFO L226 Difference]: Without dead ends: 13586 [2019-11-20 05:45:18,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2034, Invalid=4772, Unknown=0, NotChecked=0, Total=6806 [2019-11-20 05:45:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13586 states. [2019-11-20 05:45:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13586 to 7862. [2019-11-20 05:45:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7862 states. [2019-11-20 05:45:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7862 states to 7862 states and 17071 transitions. [2019-11-20 05:45:18,231 INFO L78 Accepts]: Start accepts. Automaton has 7862 states and 17071 transitions. Word has length 170 [2019-11-20 05:45:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:18,231 INFO L462 AbstractCegarLoop]: Abstraction has 7862 states and 17071 transitions. [2019-11-20 05:45:18,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 05:45:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7862 states and 17071 transitions. [2019-11-20 05:45:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-20 05:45:18,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:18,236 INFO L410 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, 1] [2019-11-20 05:45:18,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:18,436 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:18,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1182550904, now seen corresponding path program 45 times [2019-11-20 05:45:18,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:18,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795318421] [2019-11-20 05:45:18,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:45:19,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795318421] [2019-11-20 05:45:19,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894269308] [2019-11-20 05:45:19,150 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:19,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-11-20 05:45:19,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:19,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-20 05:45:19,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:19,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:19,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:19,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 05:45:19,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:19,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-20 05:45:19,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102742531] [2019-11-20 05:45:19,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 05:45:19,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 05:45:19,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 05:45:19,348 INFO L87 Difference]: Start difference. First operand 7862 states and 17071 transitions. Second operand 43 states. [2019-11-20 05:45:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:21,314 INFO L93 Difference]: Finished difference Result 15935 states and 34105 transitions. [2019-11-20 05:45:21,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-20 05:45:21,314 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 174 [2019-11-20 05:45:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:21,323 INFO L225 Difference]: With dead ends: 15935 [2019-11-20 05:45:21,323 INFO L226 Difference]: Without dead ends: 14126 [2019-11-20 05:45:21,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1861, Invalid=4945, Unknown=0, NotChecked=0, Total=6806 [2019-11-20 05:45:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14126 states. [2019-11-20 05:45:21,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14126 to 13370. [2019-11-20 05:45:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13370 states. [2019-11-20 05:45:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13370 states to 13370 states and 28093 transitions. [2019-11-20 05:45:21,450 INFO L78 Accepts]: Start accepts. Automaton has 13370 states and 28093 transitions. Word has length 174 [2019-11-20 05:45:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:21,450 INFO L462 AbstractCegarLoop]: Abstraction has 13370 states and 28093 transitions. [2019-11-20 05:45:21,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 05:45:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13370 states and 28093 transitions. [2019-11-20 05:45:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-20 05:45:21,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:21,459 INFO L410 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, 1] [2019-11-20 05:45:21,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:21,659 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash 238794661, now seen corresponding path program 46 times [2019-11-20 05:45:21,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:21,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087754134] [2019-11-20 05:45:21,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:22,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087754134] [2019-11-20 05:45:22,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064565236] [2019-11-20 05:45:22,400 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:22,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 05:45:22,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:22,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 05:45:22,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:22,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:22,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:22,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:22,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-20 05:45:22,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056002913] [2019-11-20 05:45:22,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-20 05:45:22,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:22,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-20 05:45:22,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 05:45:22,614 INFO L87 Difference]: Start difference. First operand 13370 states and 28093 transitions. Second operand 45 states. [2019-11-20 05:45:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:24,826 INFO L93 Difference]: Finished difference Result 17069 states and 36814 transitions. [2019-11-20 05:45:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-20 05:45:24,827 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 178 [2019-11-20 05:45:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:24,837 INFO L225 Difference]: With dead ends: 17069 [2019-11-20 05:45:24,837 INFO L226 Difference]: Without dead ends: 14414 [2019-11-20 05:45:24,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2287, Invalid=5369, Unknown=0, NotChecked=0, Total=7656 [2019-11-20 05:45:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14414 states. [2019-11-20 05:45:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14414 to 13658. [2019-11-20 05:45:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13658 states. [2019-11-20 05:45:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13658 states to 13658 states and 28669 transitions. [2019-11-20 05:45:24,971 INFO L78 Accepts]: Start accepts. Automaton has 13658 states and 28669 transitions. Word has length 178 [2019-11-20 05:45:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:24,971 INFO L462 AbstractCegarLoop]: Abstraction has 13658 states and 28669 transitions. [2019-11-20 05:45:24,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-20 05:45:24,972 INFO L276 IsEmpty]: Start isEmpty. Operand 13658 states and 28669 transitions. [2019-11-20 05:45:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-20 05:45:24,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:24,980 INFO L410 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 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, 1] [2019-11-20 05:45:25,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:25,181 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2115016741, now seen corresponding path program 47 times [2019-11-20 05:45:25,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:25,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860739821] [2019-11-20 05:45:25,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 1352 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:26,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860739821] [2019-11-20 05:45:26,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596888689] [2019-11-20 05:45:26,032 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:26,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-20 05:45:26,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:26,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 05:45:26,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 1410 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:26,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:45:26,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2019-11-20 05:45:26,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635088333] [2019-11-20 05:45:26,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 05:45:26,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:26,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 05:45:26,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 05:45:26,194 INFO L87 Difference]: Start difference. First operand 13658 states and 28669 transitions. Second operand 43 states. [2019-11-20 05:45:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:27,562 INFO L93 Difference]: Finished difference Result 50174 states and 100815 transitions. [2019-11-20 05:45:27,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 05:45:27,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 178 [2019-11-20 05:45:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:27,573 INFO L225 Difference]: With dead ends: 50174 [2019-11-20 05:45:27,574 INFO L226 Difference]: Without dead ends: 13586 [2019-11-20 05:45:27,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2209, Invalid=4931, Unknown=0, NotChecked=0, Total=7140 [2019-11-20 05:45:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13586 states. [2019-11-20 05:45:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13586 to 13586. [2019-11-20 05:45:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13586 states. [2019-11-20 05:45:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13586 states to 13586 states and 27961 transitions. [2019-11-20 05:45:27,728 INFO L78 Accepts]: Start accepts. Automaton has 13586 states and 27961 transitions. Word has length 178 [2019-11-20 05:45:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:27,728 INFO L462 AbstractCegarLoop]: Abstraction has 13586 states and 27961 transitions. [2019-11-20 05:45:27,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 05:45:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 13586 states and 27961 transitions. [2019-11-20 05:45:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-20 05:45:27,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:27,736 INFO L410 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, 1] [2019-11-20 05:45:27,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:27,937 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash -437170011, now seen corresponding path program 48 times [2019-11-20 05:45:27,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:27,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681016546] [2019-11-20 05:45:27,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:28,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681016546] [2019-11-20 05:45:28,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186886318] [2019-11-20 05:45:28,789 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:28,888 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-20 05:45:28,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:45:28,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 05:45:28,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:28,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:28,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:28,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:45:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:28,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:28,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-20 05:45:28,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746922880] [2019-11-20 05:45:28,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-20 05:45:28,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:28,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-20 05:45:28,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 05:45:28,975 INFO L87 Difference]: Start difference. First operand 13586 states and 27961 transitions. Second operand 45 states. [2019-11-20 05:45:31,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:31,010 INFO L93 Difference]: Finished difference Result 15674 states and 32818 transitions. [2019-11-20 05:45:31,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-20 05:45:31,010 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 178 [2019-11-20 05:45:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:31,018 INFO L225 Difference]: With dead ends: 15674 [2019-11-20 05:45:31,018 INFO L226 Difference]: Without dead ends: 12050 [2019-11-20 05:45:31,019 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2244, Invalid=5238, Unknown=0, NotChecked=0, Total=7482 [2019-11-20 05:45:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12050 states. [2019-11-20 05:45:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12050 to 11882. [2019-11-20 05:45:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11882 states. [2019-11-20 05:45:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11882 states to 11882 states and 24785 transitions. [2019-11-20 05:45:31,131 INFO L78 Accepts]: Start accepts. Automaton has 11882 states and 24785 transitions. Word has length 178 [2019-11-20 05:45:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:31,131 INFO L462 AbstractCegarLoop]: Abstraction has 11882 states and 24785 transitions. [2019-11-20 05:45:31,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-20 05:45:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 11882 states and 24785 transitions. [2019-11-20 05:45:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-20 05:45:31,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:31,139 INFO L410 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, 1] [2019-11-20 05:45:31,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:31,340 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:31,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2124948767, now seen corresponding path program 1 times [2019-11-20 05:45:31,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:31,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075513770] [2019-11-20 05:45:31,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1406 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:32,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075513770] [2019-11-20 05:45:32,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718397587] [2019-11-20 05:45:32,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:32,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 05:45:32,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1464 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:32,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:45:32,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2019-11-20 05:45:32,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196609769] [2019-11-20 05:45:32,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-20 05:45:32,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-20 05:45:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 05:45:32,327 INFO L87 Difference]: Start difference. First operand 11882 states and 24785 transitions. Second operand 45 states. [2019-11-20 05:45:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:33,480 INFO L93 Difference]: Finished difference Result 48362 states and 96844 transitions. [2019-11-20 05:45:33,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 05:45:33,481 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 182 [2019-11-20 05:45:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:33,491 INFO L225 Difference]: With dead ends: 48362 [2019-11-20 05:45:33,491 INFO L226 Difference]: Without dead ends: 9926 [2019-11-20 05:45:33,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2135, Invalid=5005, Unknown=0, NotChecked=0, Total=7140 [2019-11-20 05:45:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2019-11-20 05:45:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 9926. [2019-11-20 05:45:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9926 states. [2019-11-20 05:45:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 20505 transitions. [2019-11-20 05:45:33,594 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 20505 transitions. Word has length 182 [2019-11-20 05:45:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:33,595 INFO L462 AbstractCegarLoop]: Abstraction has 9926 states and 20505 transitions. [2019-11-20 05:45:33,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-20 05:45:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 20505 transitions. [2019-11-20 05:45:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-20 05:45:33,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:33,601 INFO L410 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, 1] [2019-11-20 05:45:33,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:33,802 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1787395378, now seen corresponding path program 1 times [2019-11-20 05:45:33,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:33,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851858848] [2019-11-20 05:45:33,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1425 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:34,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851858848] [2019-11-20 05:45:34,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673162532] [2019-11-20 05:45:34,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:34,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 05:45:34,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:34,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:45:34,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2019-11-20 05:45:34,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015396189] [2019-11-20 05:45:34,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 05:45:34,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 05:45:34,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 05:45:34,810 INFO L87 Difference]: Start difference. First operand 9926 states and 20505 transitions. Second operand 43 states. [2019-11-20 05:45:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:35,954 INFO L93 Difference]: Finished difference Result 46406 states and 92564 transitions. [2019-11-20 05:45:35,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 05:45:35,955 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 182 [2019-11-20 05:45:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:35,960 INFO L225 Difference]: With dead ends: 46406 [2019-11-20 05:45:35,960 INFO L226 Difference]: Without dead ends: 7970 [2019-11-20 05:45:35,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2209, Invalid=4931, Unknown=0, NotChecked=0, Total=7140 [2019-11-20 05:45:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7970 states. [2019-11-20 05:45:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7970 to 7970. [2019-11-20 05:45:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7970 states. [2019-11-20 05:45:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7970 states to 7970 states and 16225 transitions. [2019-11-20 05:45:36,034 INFO L78 Accepts]: Start accepts. Automaton has 7970 states and 16225 transitions. Word has length 182 [2019-11-20 05:45:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:36,034 INFO L462 AbstractCegarLoop]: Abstraction has 7970 states and 16225 transitions. [2019-11-20 05:45:36,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 05:45:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 7970 states and 16225 transitions. [2019-11-20 05:45:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-20 05:45:36,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:36,039 INFO L410 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 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, 1] [2019-11-20 05:45:36,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:36,240 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1095265621, now seen corresponding path program 49 times [2019-11-20 05:45:36,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:36,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372398730] [2019-11-20 05:45:36,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1430 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:37,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372398730] [2019-11-20 05:45:37,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85982635] [2019-11-20 05:45:37,136 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:37,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 05:45:37,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:37,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:45:37,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [45] total 47 [2019-11-20 05:45:37,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388578260] [2019-11-20 05:45:37,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 05:45:37,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 05:45:37,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 05:45:37,298 INFO L87 Difference]: Start difference. First operand 7970 states and 16225 transitions. Second operand 43 states. [2019-11-20 05:45:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:38,579 INFO L93 Difference]: Finished difference Result 25310 states and 47794 transitions. [2019-11-20 05:45:38,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 05:45:38,579 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2019-11-20 05:45:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:38,583 INFO L225 Difference]: With dead ends: 25310 [2019-11-20 05:45:38,583 INFO L226 Difference]: Without dead ends: 5327 [2019-11-20 05:45:38,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2254, Invalid=5228, Unknown=0, NotChecked=0, Total=7482 [2019-11-20 05:45:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2019-11-20 05:45:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 5327. [2019-11-20 05:45:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5327 states. [2019-11-20 05:45:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5327 states to 5327 states and 10834 transitions. [2019-11-20 05:45:38,632 INFO L78 Accepts]: Start accepts. Automaton has 5327 states and 10834 transitions. Word has length 186 [2019-11-20 05:45:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:38,633 INFO L462 AbstractCegarLoop]: Abstraction has 5327 states and 10834 transitions. [2019-11-20 05:45:38,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 05:45:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5327 states and 10834 transitions. [2019-11-20 05:45:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-20 05:45:38,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:38,636 INFO L410 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 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, 1] [2019-11-20 05:45:38,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:38,837 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2134137460, now seen corresponding path program 1 times [2019-11-20 05:45:38,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:38,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274575260] [2019-11-20 05:45:38,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1503 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:39,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274575260] [2019-11-20 05:45:39,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043834352] [2019-11-20 05:45:39,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:39,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 05:45:39,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:39,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:45:39,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [45] total 47 [2019-11-20 05:45:39,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436375028] [2019-11-20 05:45:39,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 05:45:39,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 05:45:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 05:45:39,823 INFO L87 Difference]: Start difference. First operand 5327 states and 10834 transitions. Second operand 43 states. [2019-11-20 05:45:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:41,035 INFO L93 Difference]: Finished difference Result 22667 states and 42403 transitions. [2019-11-20 05:45:41,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 05:45:41,035 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2019-11-20 05:45:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:41,037 INFO L225 Difference]: With dead ends: 22667 [2019-11-20 05:45:41,037 INFO L226 Difference]: Without dead ends: 2684 [2019-11-20 05:45:41,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2254, Invalid=5228, Unknown=0, NotChecked=0, Total=7482 [2019-11-20 05:45:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2019-11-20 05:45:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2684. [2019-11-20 05:45:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2684 states. [2019-11-20 05:45:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 5443 transitions. [2019-11-20 05:45:41,058 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 5443 transitions. Word has length 186 [2019-11-20 05:45:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:41,058 INFO L462 AbstractCegarLoop]: Abstraction has 2684 states and 5443 transitions. [2019-11-20 05:45:41,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 05:45:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 5443 transitions. [2019-11-20 05:45:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-20 05:45:41,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:45:41,060 INFO L410 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 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, 1] [2019-11-20 05:45:41,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:41,260 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 05:45:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:45:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash -601228767, now seen corresponding path program 1 times [2019-11-20 05:45:41,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 05:45:41,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540927864] [2019-11-20 05:45:41,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 05:45:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1503 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:41,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540927864] [2019-11-20 05:45:41,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308483298] [2019-11-20 05:45:41,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:45:42,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 05:45:42,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:45:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:45:42,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 05:45:42,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [45] total 47 [2019-11-20 05:45:42,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98596946] [2019-11-20 05:45:42,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-20 05:45:42,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 05:45:42,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-20 05:45:42,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 05:45:42,121 INFO L87 Difference]: Start difference. First operand 2684 states and 5443 transitions. Second operand 43 states. [2019-11-20 05:45:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:45:43,251 INFO L93 Difference]: Finished difference Result 20024 states and 37012 transitions. [2019-11-20 05:45:43,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 05:45:43,251 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2019-11-20 05:45:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:45:43,252 INFO L225 Difference]: With dead ends: 20024 [2019-11-20 05:45:43,252 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 05:45:43,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2254, Invalid=5228, Unknown=0, NotChecked=0, Total=7482 [2019-11-20 05:45:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 05:45:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 05:45:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 05:45:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 05:45:43,253 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2019-11-20 05:45:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:45:43,253 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 05:45:43,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-20 05:45:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 05:45:43,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 05:45:43,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 05:45:43,455 INFO L304 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-20 05:45:43,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:45:43 BasicIcfg [2019-11-20 05:45:43,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 05:45:43,457 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 05:45:43,458 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 05:45:43,458 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 05:45:43,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:43:56" (3/4) ... [2019-11-20 05:45:43,461 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 05:45:43,466 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-11-20 05:45:43,466 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-11-20 05:45:43,470 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-20 05:45:43,470 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 05:45:43,470 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 05:45:43,502 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_75e875e5-be54-4a28-8b2d-453be1b672b8/bin/uautomizer/witness.graphml [2019-11-20 05:45:43,503 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 05:45:43,504 INFO L168 Benchmark]: Toolchain (without parser) took 108214.48 ms. Allocated memory was 1.0 GB in the beginning and 3.3 GB in the end (delta: 2.3 GB). Free memory was 943.4 MB in the beginning and 1.9 GB in the end (delta: -920.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2019-11-20 05:45:43,504 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 05:45:43,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 520.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -175.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 05:45:43,505 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.12 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. [2019-11-20 05:45:43,505 INFO L168 Benchmark]: Boogie Preprocessor took 25.42 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. [2019-11-20 05:45:43,506 INFO L168 Benchmark]: RCFGBuilder took 449.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-20 05:45:43,506 INFO L168 Benchmark]: TraceAbstraction took 107128.87 ms. Allocated memory was 1.2 GB in the beginning and 3.3 GB in the end (delta: 2.1 GB). Free memory was 1.1 GB in the beginning and 1.9 GB in the end (delta: -787.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2019-11-20 05:45:43,507 INFO L168 Benchmark]: Witness Printer took 45.24 ms. Allocated memory is still 3.3 GB. Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2019-11-20 05:45:43,509 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 520.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -175.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.12 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 25.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 449.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 107128.87 ms. Allocated memory was 1.2 GB in the beginning and 3.3 GB in the end (delta: 2.1 GB). Free memory was 1.1 GB in the beginning and 1.9 GB in the end (delta: -787.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. * Witness Printer took 45.24 ms. Allocated memory is still 3.3 GB. Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 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 9 procedures, 101 locations, 1 error locations. Result: SAFE, OverallTime: 106.9s, OverallIterations: 60, TraceHistogramMax: 22, AutomataDifference: 57.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 13046 SDtfs, 119803 SDslu, 114606 SDs, 0 SdLazy, 17417 SolverSat, 29769 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8999 GetRequests, 6214 SyntacticMatches, 0 SemanticMatches, 2785 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31911 ImplicationChecksByTransitivity, 49.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13658occurred in iteration=53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.3s AutomataMinimizationTime, 60 MinimizatonAttempts, 76281 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 25.1s InterpolantComputationTime, 12218 NumberOfCodeBlocks, 12218 NumberOfCodeBlocksAsserted, 386 NumberOfCheckSat, 12103 ConstructedInterpolants, 0 QuantifiedInterpolants, 4648703 SizeOfPredicates, 1400 NumberOfNonLiveVariables, 13695 ConjunctsInSsa, 1563 ConjunctsInUnsatCore, 115 InterpolantComputations, 10 PerfectInterpolantSequences, 17688/63366 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...