./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 76260ed82768318ee6f3ac3cb9cfff5a60080963 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:34:08,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:34:08,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:34:08,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:34:08,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:34:08,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:34:08,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:34:08,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:34:08,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:34:08,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:34:08,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:34:08,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:34:08,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:34:08,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:34:08,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:34:08,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:34:08,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:34:08,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:34:08,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:34:08,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:34:08,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:34:08,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:34:08,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:34:08,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:34:08,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:34:08,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:34:08,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:34:08,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:34:08,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:34:08,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:34:08,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:34:08,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:34:08,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:34:08,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:34:08,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:34:08,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:34:08,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:34:08,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:34:08,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:34:08,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:34:08,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:34:08,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 13:34:08,138 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:34:08,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:34:08,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:34:08,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:34:08,139 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:34:08,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:34:08,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:34:08,141 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:34:08,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:34:08,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:34:08,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:34:08,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:34:08,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:34:08,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:34:08,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:34:08,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:34:08,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:34:08,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 13:34:08,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:34:08,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:34:08,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:34:08,142 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_36a9d922-4a21-4d84-afba-64c796cf61d3/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 -> 76260ed82768318ee6f3ac3cb9cfff5a60080963 [2019-12-07 13:34:08,244 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:34:08,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:34:08,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:34:08,258 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:34:08,258 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:34:08,259 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gr2006.i [2019-12-07 13:34:08,301 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/data/ddf69ba6b/f7a83804a6ff4eaebf0d283b386a625c/FLAGfd81041fb [2019-12-07 13:34:08,627 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:34:08,627 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/sv-benchmarks/c/loop-lit/gr2006.i [2019-12-07 13:34:08,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/data/ddf69ba6b/f7a83804a6ff4eaebf0d283b386a625c/FLAGfd81041fb [2019-12-07 13:34:08,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/data/ddf69ba6b/f7a83804a6ff4eaebf0d283b386a625c [2019-12-07 13:34:08,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:34:08,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:34:08,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:34:08,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:34:08,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:34:08,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605e252b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08, skipping insertion in model container [2019-12-07 13:34:08,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:34:08,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:34:08,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:34:08,759 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:34:08,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:34:08,811 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:34:08,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08 WrapperNode [2019-12-07 13:34:08,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:34:08,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:34:08,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:34:08,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:34:08,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:34:08,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:34:08,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:34:08,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:34:08,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... [2019-12-07 13:34:08,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:34:08,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:34:08,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:34:08,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:34:08,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:08,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:34:08,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:34:08,989 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:34:08,989 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-12-07 13:34:08,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:34:08 BoogieIcfgContainer [2019-12-07 13:34:08,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:34:08,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:34:08,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:34:08,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:34:08,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:34:08" (1/3) ... [2019-12-07 13:34:08,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387d4a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:34:08, skipping insertion in model container [2019-12-07 13:34:08,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:34:08" (2/3) ... [2019-12-07 13:34:08,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387d4a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:34:08, skipping insertion in model container [2019-12-07 13:34:08,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:34:08" (3/3) ... [2019-12-07 13:34:08,995 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2019-12-07 13:34:09,001 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:34:09,005 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:34:09,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:34:09,026 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:34:09,026 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:34:09,026 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:34:09,026 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:34:09,027 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:34:09,027 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:34:09,027 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:34:09,027 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:34:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-12-07 13:34:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 13:34:09,039 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:09,039 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 13:34:09,040 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:09,043 INFO L82 PathProgramCache]: Analyzing trace with hash 30262788, now seen corresponding path program 1 times [2019-12-07 13:34:09,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:09,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755584759] [2019-12-07 13:34:09,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:09,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755584759] [2019-12-07 13:34:09,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:34:09,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:34:09,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422060554] [2019-12-07 13:34:09,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 13:34:09,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 13:34:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 13:34:09,129 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-12-07 13:34:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:09,139 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2019-12-07 13:34:09,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 13:34:09,140 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-12-07 13:34:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:09,146 INFO L225 Difference]: With dead ends: 20 [2019-12-07 13:34:09,146 INFO L226 Difference]: Without dead ends: 8 [2019-12-07 13:34:09,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 13:34:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-12-07 13:34:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-12-07 13:34:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 13:34:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-12-07 13:34:09,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-12-07 13:34:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:09,169 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-12-07 13:34:09,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 13:34:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-12-07 13:34:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:34:09,169 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:09,169 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:34:09,170 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1365765045, now seen corresponding path program 1 times [2019-12-07 13:34:09,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:09,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666704072] [2019-12-07 13:34:09,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:09,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666704072] [2019-12-07 13:34:09,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:34:09,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:34:09,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483901876] [2019-12-07 13:34:09,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:34:09,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:09,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:34:09,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:34:09,203 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-12-07 13:34:09,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:09,227 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2019-12-07 13:34:09,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:34:09,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 13:34:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:09,228 INFO L225 Difference]: With dead ends: 16 [2019-12-07 13:34:09,228 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 13:34:09,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:34:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 13:34:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 13:34:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 13:34:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-12-07 13:34:09,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-12-07 13:34:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:09,231 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-12-07 13:34:09,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:34:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-12-07 13:34:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:34:09,232 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:09,232 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:34:09,232 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918003, now seen corresponding path program 1 times [2019-12-07 13:34:09,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:09,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729842150] [2019-12-07 13:34:09,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:09,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729842150] [2019-12-07 13:34:09,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:34:09,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:34:09,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048344481] [2019-12-07 13:34:09,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:34:09,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:09,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:34:09,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:34:09,245 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-12-07 13:34:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:09,255 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-12-07 13:34:09,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:34:09,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 13:34:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:09,256 INFO L225 Difference]: With dead ends: 26 [2019-12-07 13:34:09,256 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 13:34:09,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:34:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 13:34:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 13:34:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 13:34:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-12-07 13:34:09,259 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2019-12-07 13:34:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:09,259 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-12-07 13:34:09,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:34:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-12-07 13:34:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 13:34:09,260 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:09,260 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 13:34:09,260 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:09,260 INFO L82 PathProgramCache]: Analyzing trace with hash 10637259, now seen corresponding path program 1 times [2019-12-07 13:34:09,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:09,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17814074] [2019-12-07 13:34:09,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:34:09,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17814074] [2019-12-07 13:34:09,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211956242] [2019-12-07 13:34:09,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:09,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 13:34:09,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:34:09,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:09,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-12-07 13:34:09,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748003514] [2019-12-07 13:34:09,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:34:09,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:34:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:34:09,321 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-12-07 13:34:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:09,337 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-12-07 13:34:09,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:34:09,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-12-07 13:34:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:09,338 INFO L225 Difference]: With dead ends: 29 [2019-12-07 13:34:09,338 INFO L226 Difference]: Without dead ends: 18 [2019-12-07 13:34:09,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:34:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-12-07 13:34:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-12-07 13:34:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 13:34:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-12-07 13:34:09,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-12-07 13:34:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:09,342 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-12-07 13:34:09,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:34:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-12-07 13:34:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 13:34:09,342 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:09,342 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 13:34:09,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:09,544 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:09,545 INFO L82 PathProgramCache]: Analyzing trace with hash -300800067, now seen corresponding path program 2 times [2019-12-07 13:34:09,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:09,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902130129] [2019-12-07 13:34:09,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 13:34:09,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902130129] [2019-12-07 13:34:09,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289296726] [2019-12-07 13:34:09,625 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:09,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:34:09,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:09,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 13:34:09,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:34:09,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:09,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2019-12-07 13:34:09,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882750759] [2019-12-07 13:34:09,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 13:34:09,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 13:34:09,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-12-07 13:34:09,677 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2019-12-07 13:34:09,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:09,781 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-12-07 13:34:09,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 13:34:09,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-12-07 13:34:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:09,782 INFO L225 Difference]: With dead ends: 48 [2019-12-07 13:34:09,782 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 13:34:09,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:34:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 13:34:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-12-07 13:34:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 13:34:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-12-07 13:34:09,787 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2019-12-07 13:34:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:09,788 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-12-07 13:34:09,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 13:34:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-12-07 13:34:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 13:34:09,788 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:09,788 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1] [2019-12-07 13:34:09,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:09,989 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:09,990 INFO L82 PathProgramCache]: Analyzing trace with hash 499970687, now seen corresponding path program 3 times [2019-12-07 13:34:09,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:09,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333053066] [2019-12-07 13:34:09,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 13:34:10,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333053066] [2019-12-07 13:34:10,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551765180] [2019-12-07 13:34:10,070 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:10,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 13:34:10,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:10,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:34:10,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 13:34:10,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:10,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2019-12-07 13:34:10,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99804257] [2019-12-07 13:34:10,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 13:34:10,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:10,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 13:34:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:34:10,126 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 11 states. [2019-12-07 13:34:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:10,237 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2019-12-07 13:34:10,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:34:10,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-12-07 13:34:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:10,239 INFO L225 Difference]: With dead ends: 75 [2019-12-07 13:34:10,239 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 13:34:10,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:34:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 13:34:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2019-12-07 13:34:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 13:34:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-12-07 13:34:10,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 22 [2019-12-07 13:34:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:10,245 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-12-07 13:34:10,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 13:34:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-12-07 13:34:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 13:34:10,246 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:10,246 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 8, 3, 1, 1, 1, 1, 1] [2019-12-07 13:34:10,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:10,447 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:10,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:10,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1791970037, now seen corresponding path program 4 times [2019-12-07 13:34:10,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:10,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457723138] [2019-12-07 13:34:10,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 81 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:10,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457723138] [2019-12-07 13:34:10,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655113917] [2019-12-07 13:34:10,598 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:10,623 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:34:10,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:10,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 13:34:10,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 80 proven. 15 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-12-07 13:34:10,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:10,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 19 [2019-12-07 13:34:10,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065122503] [2019-12-07 13:34:10,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 13:34:10,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:10,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 13:34:10,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:34:10,670 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 20 states. [2019-12-07 13:34:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:10,754 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-12-07 13:34:10,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:34:10,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2019-12-07 13:34:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:10,755 INFO L225 Difference]: With dead ends: 71 [2019-12-07 13:34:10,755 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 13:34:10,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2019-12-07 13:34:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 13:34:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-12-07 13:34:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 13:34:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-12-07 13:34:10,760 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 37 [2019-12-07 13:34:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:10,760 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-12-07 13:34:10,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 13:34:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-12-07 13:34:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 13:34:10,761 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:10,762 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 8, 4, 1, 1, 1, 1, 1] [2019-12-07 13:34:10,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:10,963 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1811175165, now seen corresponding path program 5 times [2019-12-07 13:34:10,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:10,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170944271] [2019-12-07 13:34:10,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 84 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:11,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170944271] [2019-12-07 13:34:11,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785255617] [2019-12-07 13:34:11,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:11,157 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 13:34:11,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:11,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 13:34:11,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-12-07 13:34:11,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:11,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 22 [2019-12-07 13:34:11,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011839151] [2019-12-07 13:34:11,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 13:34:11,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:11,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 13:34:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2019-12-07 13:34:11,217 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 23 states. [2019-12-07 13:34:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:11,317 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2019-12-07 13:34:11,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:34:11,318 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2019-12-07 13:34:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:11,318 INFO L225 Difference]: With dead ends: 74 [2019-12-07 13:34:11,319 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 13:34:11,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2019-12-07 13:34:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 13:34:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-12-07 13:34:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 13:34:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-12-07 13:34:11,325 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 40 [2019-12-07 13:34:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:11,325 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-12-07 13:34:11,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 13:34:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-12-07 13:34:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 13:34:11,326 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:11,326 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1] [2019-12-07 13:34:11,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:11,527 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1007740981, now seen corresponding path program 6 times [2019-12-07 13:34:11,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:11,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515648428] [2019-12-07 13:34:11,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 87 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:11,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515648428] [2019-12-07 13:34:11,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127514647] [2019-12-07 13:34:11,703 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:11,728 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 13:34:11,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:11,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:34:11,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 124 proven. 40 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-12-07 13:34:11,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:11,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2019-12-07 13:34:11,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182650078] [2019-12-07 13:34:11,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 13:34:11,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 13:34:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2019-12-07 13:34:11,791 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 26 states. [2019-12-07 13:34:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:11,928 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-12-07 13:34:11,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 13:34:11,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2019-12-07 13:34:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:11,929 INFO L225 Difference]: With dead ends: 77 [2019-12-07 13:34:11,929 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 13:34:11,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 13:34:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 13:34:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-12-07 13:34:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 13:34:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-12-07 13:34:11,936 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 43 [2019-12-07 13:34:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:11,936 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-12-07 13:34:11,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 13:34:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-12-07 13:34:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-07 13:34:11,937 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:11,937 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 8, 6, 1, 1, 1, 1, 1] [2019-12-07 13:34:12,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:12,139 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash 156892221, now seen corresponding path program 7 times [2019-12-07 13:34:12,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:12,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214529503] [2019-12-07 13:34:12,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 90 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:12,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214529503] [2019-12-07 13:34:12,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139275127] [2019-12-07 13:34:12,334 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:12,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 13:34:12,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 146 proven. 57 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-12-07 13:34:12,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:12,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 28 [2019-12-07 13:34:12,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333464973] [2019-12-07 13:34:12,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 13:34:12,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:12,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 13:34:12,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2019-12-07 13:34:12,437 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 29 states. [2019-12-07 13:34:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:12,589 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2019-12-07 13:34:12,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 13:34:12,590 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2019-12-07 13:34:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:12,590 INFO L225 Difference]: With dead ends: 80 [2019-12-07 13:34:12,590 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 13:34:12,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 13:34:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 13:34:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-12-07 13:34:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 13:34:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-12-07 13:34:12,595 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 46 [2019-12-07 13:34:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:12,595 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-12-07 13:34:12,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 13:34:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-12-07 13:34:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-07 13:34:12,595 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:12,595 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 8, 7, 1, 1, 1, 1, 1] [2019-12-07 13:34:12,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:12,797 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 998795915, now seen corresponding path program 8 times [2019-12-07 13:34:12,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:12,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241483055] [2019-12-07 13:34:12,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 168 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-12-07 13:34:12,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241483055] [2019-12-07 13:34:12,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573705341] [2019-12-07 13:34:12,878 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:12,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:34:12,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:12,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 13:34:12,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 168 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-12-07 13:34:12,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:12,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-12-07 13:34:12,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997806808] [2019-12-07 13:34:12,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:34:12,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:34:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:34:12,914 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 10 states. [2019-12-07 13:34:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:12,936 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-12-07 13:34:12,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:34:12,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2019-12-07 13:34:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:12,937 INFO L225 Difference]: With dead ends: 83 [2019-12-07 13:34:12,937 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 13:34:12,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:34:12,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 13:34:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-12-07 13:34:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 13:34:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-12-07 13:34:12,941 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 49 [2019-12-07 13:34:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:12,941 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-12-07 13:34:12,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:34:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-12-07 13:34:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-07 13:34:12,942 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:12,942 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 8, 8, 1, 1, 1, 1, 1] [2019-12-07 13:34:13,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:13,143 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash -457264771, now seen corresponding path program 9 times [2019-12-07 13:34:13,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:13,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596535098] [2019-12-07 13:34:13,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-12-07 13:34:13,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596535098] [2019-12-07 13:34:13,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998155616] [2019-12-07 13:34:13,255 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:13,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-12-07 13:34:13,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:13,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 13:34:13,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 177 proven. 162 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-07 13:34:13,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:13,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2019-12-07 13:34:13,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384429774] [2019-12-07 13:34:13,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 13:34:13,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:13,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 13:34:13,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2019-12-07 13:34:13,378 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 21 states. [2019-12-07 13:34:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:13,620 INFO L93 Difference]: Finished difference Result 225 states and 297 transitions. [2019-12-07 13:34:13,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-07 13:34:13,620 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2019-12-07 13:34:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:13,622 INFO L225 Difference]: With dead ends: 225 [2019-12-07 13:34:13,622 INFO L226 Difference]: Without dead ends: 221 [2019-12-07 13:34:13,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 13:34:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-07 13:34:13,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 83. [2019-12-07 13:34:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 13:34:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2019-12-07 13:34:13,630 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 52 [2019-12-07 13:34:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:13,630 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2019-12-07 13:34:13,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 13:34:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2019-12-07 13:34:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-12-07 13:34:13,631 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:13,631 INFO L410 BasicCegarLoop]: trace histogram [26, 25, 18, 8, 1, 1, 1, 1, 1] [2019-12-07 13:34:13,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:13,832 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1075705725, now seen corresponding path program 10 times [2019-12-07 13:34:13,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:13,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987124055] [2019-12-07 13:34:13,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 451 proven. 524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:14,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987124055] [2019-12-07 13:34:14,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230756947] [2019-12-07 13:34:14,183 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:14,210 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:34:14,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:14,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 13:34:14,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 450 proven. 100 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:14,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:14,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 10] total 44 [2019-12-07 13:34:14,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659057237] [2019-12-07 13:34:14,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-12-07 13:34:14,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:14,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-12-07 13:34:14,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 13:34:14,371 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 45 states. [2019-12-07 13:34:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:14,582 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2019-12-07 13:34:14,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 13:34:14,582 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 82 [2019-12-07 13:34:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:14,582 INFO L225 Difference]: With dead ends: 146 [2019-12-07 13:34:14,582 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 13:34:14,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=2975, Unknown=0, NotChecked=0, Total=3782 [2019-12-07 13:34:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 13:34:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-12-07 13:34:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 13:34:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2019-12-07 13:34:14,588 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 82 [2019-12-07 13:34:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:14,589 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2019-12-07 13:34:14,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-12-07 13:34:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2019-12-07 13:34:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-12-07 13:34:14,589 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:14,589 INFO L410 BasicCegarLoop]: trace histogram [27, 26, 18, 9, 1, 1, 1, 1, 1] [2019-12-07 13:34:14,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:14,791 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1924147509, now seen corresponding path program 11 times [2019-12-07 13:34:14,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:14,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381661897] [2019-12-07 13:34:14,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 454 proven. 599 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:15,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381661897] [2019-12-07 13:34:15,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300331625] [2019-12-07 13:34:15,204 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:15,248 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-12-07 13:34:15,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:15,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 13:34:15,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 502 proven. 126 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:15,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:15,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11] total 47 [2019-12-07 13:34:15,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137418979] [2019-12-07 13:34:15,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-07 13:34:15,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-07 13:34:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2019-12-07 13:34:15,414 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 48 states. [2019-12-07 13:34:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:15,680 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2019-12-07 13:34:15,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 13:34:15,680 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 85 [2019-12-07 13:34:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:15,680 INFO L225 Difference]: With dead ends: 149 [2019-12-07 13:34:15,681 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 13:34:15,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=3469, Unknown=0, NotChecked=0, Total=4422 [2019-12-07 13:34:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 13:34:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-12-07 13:34:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 13:34:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2019-12-07 13:34:15,686 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 85 [2019-12-07 13:34:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:15,686 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2019-12-07 13:34:15,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-07 13:34:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2019-12-07 13:34:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-12-07 13:34:15,687 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:15,687 INFO L410 BasicCegarLoop]: trace histogram [28, 27, 18, 10, 1, 1, 1, 1, 1] [2019-12-07 13:34:15,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:15,888 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash -872346435, now seen corresponding path program 12 times [2019-12-07 13:34:15,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:15,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088566627] [2019-12-07 13:34:15,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 457 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:16,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088566627] [2019-12-07 13:34:16,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757595994] [2019-12-07 13:34:16,344 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:16,383 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-12-07 13:34:16,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:16,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 13:34:16,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 554 proven. 155 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:16,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:16,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12] total 50 [2019-12-07 13:34:16,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777832868] [2019-12-07 13:34:16,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-07 13:34:16,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-07 13:34:16,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2050, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 13:34:16,592 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 51 states. [2019-12-07 13:34:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:16,899 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2019-12-07 13:34:16,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 13:34:16,899 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 88 [2019-12-07 13:34:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:16,900 INFO L225 Difference]: With dead ends: 152 [2019-12-07 13:34:16,900 INFO L226 Difference]: Without dead ends: 93 [2019-12-07 13:34:16,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1114, Invalid=3998, Unknown=0, NotChecked=0, Total=5112 [2019-12-07 13:34:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-07 13:34:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-12-07 13:34:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-07 13:34:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2019-12-07 13:34:16,906 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 88 [2019-12-07 13:34:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:16,906 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2019-12-07 13:34:16,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-07 13:34:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2019-12-07 13:34:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-12-07 13:34:16,907 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:16,907 INFO L410 BasicCegarLoop]: trace histogram [29, 28, 18, 11, 1, 1, 1, 1, 1] [2019-12-07 13:34:17,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:17,109 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:17,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1547024779, now seen corresponding path program 13 times [2019-12-07 13:34:17,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:17,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407341618] [2019-12-07 13:34:17,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 460 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:17,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407341618] [2019-12-07 13:34:17,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783647342] [2019-12-07 13:34:17,585 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:17,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 13:34:17,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 606 proven. 187 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:17,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:17,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 53 [2019-12-07 13:34:17,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396228850] [2019-12-07 13:34:17,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-12-07 13:34:17,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:17,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-12-07 13:34:17,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=2302, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 13:34:17,831 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 54 states. [2019-12-07 13:34:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:18,196 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2019-12-07 13:34:18,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 13:34:18,196 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 91 [2019-12-07 13:34:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:18,197 INFO L225 Difference]: With dead ends: 155 [2019-12-07 13:34:18,197 INFO L226 Difference]: Without dead ends: 96 [2019-12-07 13:34:18,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1290, Invalid=4562, Unknown=0, NotChecked=0, Total=5852 [2019-12-07 13:34:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-07 13:34:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-12-07 13:34:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-07 13:34:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2019-12-07 13:34:18,202 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 91 [2019-12-07 13:34:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:18,202 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2019-12-07 13:34:18,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-12-07 13:34:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2019-12-07 13:34:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-12-07 13:34:18,203 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:18,203 INFO L410 BasicCegarLoop]: trace histogram [30, 29, 18, 12, 1, 1, 1, 1, 1] [2019-12-07 13:34:18,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:18,404 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1106300419, now seen corresponding path program 14 times [2019-12-07 13:34:18,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:18,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054467105] [2019-12-07 13:34:18,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 463 proven. 842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:18,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054467105] [2019-12-07 13:34:18,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384044762] [2019-12-07 13:34:18,931 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:18,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:34:18,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:18,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:34:18,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 658 proven. 222 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:19,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:19,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 56 [2019-12-07 13:34:19,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624914810] [2019-12-07 13:34:19,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-12-07 13:34:19,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-12-07 13:34:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 13:34:19,207 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 57 states. [2019-12-07 13:34:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:19,594 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2019-12-07 13:34:19,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 13:34:19,594 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 94 [2019-12-07 13:34:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:19,595 INFO L225 Difference]: With dead ends: 158 [2019-12-07 13:34:19,595 INFO L226 Difference]: Without dead ends: 99 [2019-12-07 13:34:19,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1481, Invalid=5161, Unknown=0, NotChecked=0, Total=6642 [2019-12-07 13:34:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-07 13:34:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-12-07 13:34:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-07 13:34:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2019-12-07 13:34:19,600 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 94 [2019-12-07 13:34:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:19,600 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2019-12-07 13:34:19,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-12-07 13:34:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2019-12-07 13:34:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-12-07 13:34:19,601 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:19,601 INFO L410 BasicCegarLoop]: trace histogram [31, 30, 18, 13, 1, 1, 1, 1, 1] [2019-12-07 13:34:19,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:19,802 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1739158453, now seen corresponding path program 15 times [2019-12-07 13:34:19,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:19,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206539695] [2019-12-07 13:34:19,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 466 proven. 929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:20,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206539695] [2019-12-07 13:34:20,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741608558] [2019-12-07 13:34:20,356 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:20,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2019-12-07 13:34:20,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:20,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 13:34:20,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 875 proven. 482 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-12-07 13:34:20,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:20,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 19] total 63 [2019-12-07 13:34:20,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349649210] [2019-12-07 13:34:20,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-12-07 13:34:20,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:20,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-12-07 13:34:20,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1071, Invalid=2961, Unknown=0, NotChecked=0, Total=4032 [2019-12-07 13:34:20,676 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 64 states. [2019-12-07 13:34:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:21,156 INFO L93 Difference]: Finished difference Result 161 states and 198 transitions. [2019-12-07 13:34:21,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-07 13:34:21,157 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 97 [2019-12-07 13:34:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:21,157 INFO L225 Difference]: With dead ends: 161 [2019-12-07 13:34:21,157 INFO L226 Difference]: Without dead ends: 101 [2019-12-07 13:34:21,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2075, Invalid=6297, Unknown=0, NotChecked=0, Total=8372 [2019-12-07 13:34:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-07 13:34:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-12-07 13:34:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-07 13:34:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2019-12-07 13:34:21,163 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 97 [2019-12-07 13:34:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:21,163 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2019-12-07 13:34:21,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-12-07 13:34:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2019-12-07 13:34:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-12-07 13:34:21,164 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:21,164 INFO L410 BasicCegarLoop]: trace histogram [32, 31, 18, 14, 1, 1, 1, 1, 1] [2019-12-07 13:34:21,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:21,365 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -306419907, now seen corresponding path program 16 times [2019-12-07 13:34:21,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:21,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596107032] [2019-12-07 13:34:21,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 469 proven. 1019 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:21,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596107032] [2019-12-07 13:34:21,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103832974] [2019-12-07 13:34:21,974 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:22,005 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:34:22,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:22,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 13:34:22,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 762 proven. 301 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:22,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:22,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 16] total 62 [2019-12-07 13:34:22,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829547493] [2019-12-07 13:34:22,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-07 13:34:22,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:22,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-07 13:34:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=3136, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 13:34:22,311 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 63 states. [2019-12-07 13:34:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:22,805 INFO L93 Difference]: Finished difference Result 164 states and 201 transitions. [2019-12-07 13:34:22,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 13:34:22,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 100 [2019-12-07 13:34:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:22,806 INFO L225 Difference]: With dead ends: 164 [2019-12-07 13:34:22,806 INFO L226 Difference]: Without dead ends: 105 [2019-12-07 13:34:22,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1908, Invalid=6464, Unknown=0, NotChecked=0, Total=8372 [2019-12-07 13:34:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-07 13:34:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-12-07 13:34:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-07 13:34:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2019-12-07 13:34:22,811 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 100 [2019-12-07 13:34:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:22,811 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2019-12-07 13:34:22,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-12-07 13:34:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2019-12-07 13:34:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-12-07 13:34:22,812 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:22,812 INFO L410 BasicCegarLoop]: trace histogram [33, 32, 18, 15, 1, 1, 1, 1, 1] [2019-12-07 13:34:23,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:23,013 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:23,014 INFO L82 PathProgramCache]: Analyzing trace with hash -977383669, now seen corresponding path program 17 times [2019-12-07 13:34:23,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:23,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770174382] [2019-12-07 13:34:23,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 472 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:23,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770174382] [2019-12-07 13:34:23,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976357646] [2019-12-07 13:34:23,652 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:23,696 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-12-07 13:34:23,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:23,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 13:34:23,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 814 proven. 345 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:24,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:24,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 17] total 65 [2019-12-07 13:34:24,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748583350] [2019-12-07 13:34:24,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-12-07 13:34:24,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-12-07 13:34:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=3440, Unknown=0, NotChecked=0, Total=4290 [2019-12-07 13:34:24,042 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 66 states. [2019-12-07 13:34:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:24,599 INFO L93 Difference]: Finished difference Result 167 states and 204 transitions. [2019-12-07 13:34:24,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-07 13:34:24,600 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 103 [2019-12-07 13:34:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:24,600 INFO L225 Difference]: With dead ends: 167 [2019-12-07 13:34:24,600 INFO L226 Difference]: Without dead ends: 108 [2019-12-07 13:34:24,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2144, Invalid=7168, Unknown=0, NotChecked=0, Total=9312 [2019-12-07 13:34:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-07 13:34:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-12-07 13:34:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-07 13:34:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2019-12-07 13:34:24,604 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 103 [2019-12-07 13:34:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:24,604 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2019-12-07 13:34:24,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-12-07 13:34:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2019-12-07 13:34:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-12-07 13:34:24,605 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:24,605 INFO L410 BasicCegarLoop]: trace histogram [34, 33, 18, 16, 1, 1, 1, 1, 1] [2019-12-07 13:34:24,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:24,806 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -881021827, now seen corresponding path program 18 times [2019-12-07 13:34:24,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:24,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272919743] [2019-12-07 13:34:24,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 475 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:25,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272919743] [2019-12-07 13:34:25,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226969083] [2019-12-07 13:34:25,479 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:25,522 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2019-12-07 13:34:25,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:25,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 13:34:25,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 866 proven. 392 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:25,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:25,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 18] total 68 [2019-12-07 13:34:25,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708437875] [2019-12-07 13:34:25,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-12-07 13:34:25,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-12-07 13:34:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=3757, Unknown=0, NotChecked=0, Total=4692 [2019-12-07 13:34:25,907 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 69 states. [2019-12-07 13:34:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:26,524 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2019-12-07 13:34:26,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 13:34:26,524 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 106 [2019-12-07 13:34:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:26,525 INFO L225 Difference]: With dead ends: 170 [2019-12-07 13:34:26,525 INFO L226 Difference]: Without dead ends: 111 [2019-12-07 13:34:26,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2395, Invalid=7907, Unknown=0, NotChecked=0, Total=10302 [2019-12-07 13:34:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-07 13:34:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-12-07 13:34:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-07 13:34:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2019-12-07 13:34:26,529 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 106 [2019-12-07 13:34:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:26,529 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2019-12-07 13:34:26,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-12-07 13:34:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2019-12-07 13:34:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-12-07 13:34:26,530 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:26,530 INFO L410 BasicCegarLoop]: trace histogram [35, 34, 18, 17, 1, 1, 1, 1, 1] [2019-12-07 13:34:26,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:26,731 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash 796459467, now seen corresponding path program 19 times [2019-12-07 13:34:26,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:26,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977909337] [2019-12-07 13:34:26,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 918 proven. 442 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:26,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977909337] [2019-12-07 13:34:26,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19281984] [2019-12-07 13:34:26,891 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:26,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 13:34:26,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 918 proven. 442 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:26,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:26,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2019-12-07 13:34:26,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782945268] [2019-12-07 13:34:26,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 13:34:26,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:26,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 13:34:26,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:34:26,936 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 20 states. [2019-12-07 13:34:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:26,974 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2019-12-07 13:34:26,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 13:34:26,974 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2019-12-07 13:34:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:26,975 INFO L225 Difference]: With dead ends: 173 [2019-12-07 13:34:26,975 INFO L226 Difference]: Without dead ends: 114 [2019-12-07 13:34:26,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:34:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-12-07 13:34:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-12-07 13:34:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-07 13:34:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2019-12-07 13:34:26,979 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 109 [2019-12-07 13:34:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:26,979 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2019-12-07 13:34:26,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 13:34:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2019-12-07 13:34:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-12-07 13:34:26,979 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:26,979 INFO L410 BasicCegarLoop]: trace histogram [36, 35, 18, 18, 1, 1, 1, 1, 1] [2019-12-07 13:34:27,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:27,180 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1597767235, now seen corresponding path program 20 times [2019-12-07 13:34:27,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:27,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911756746] [2019-12-07 13:34:27,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-12-07 13:34:27,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911756746] [2019-12-07 13:34:27,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408436965] [2019-12-07 13:34:27,343 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:27,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:34:27,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:27,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 13:34:27,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 970 proven. 495 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-12-07 13:34:27,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:27,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2019-12-07 13:34:27,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515875012] [2019-12-07 13:34:27,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-07 13:34:27,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:27,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-07 13:34:27,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 13:34:27,631 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand 41 states. [2019-12-07 13:34:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:28,321 INFO L93 Difference]: Finished difference Result 488 states and 635 transitions. [2019-12-07 13:34:28,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-12-07 13:34:28,321 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 112 [2019-12-07 13:34:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:28,323 INFO L225 Difference]: With dead ends: 488 [2019-12-07 13:34:28,323 INFO L226 Difference]: Without dead ends: 429 [2019-12-07 13:34:28,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1493, Invalid=4987, Unknown=0, NotChecked=0, Total=6480 [2019-12-07 13:34:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2019-12-07 13:34:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 146. [2019-12-07 13:34:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-07 13:34:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2019-12-07 13:34:28,332 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 112 [2019-12-07 13:34:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:28,333 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2019-12-07 13:34:28,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-07 13:34:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2019-12-07 13:34:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-12-07 13:34:28,333 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:28,333 INFO L410 BasicCegarLoop]: trace histogram [38, 37, 19, 19, 1, 1, 1, 1, 1] [2019-12-07 13:34:28,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:28,534 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:28,535 INFO L82 PathProgramCache]: Analyzing trace with hash -244187009, now seen corresponding path program 21 times [2019-12-07 13:34:28,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:28,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254699036] [2019-12-07 13:34:28,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 1558 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-12-07 13:34:28,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254699036] [2019-12-07 13:34:28,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365344251] [2019-12-07 13:34:28,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:28,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2019-12-07 13:34:28,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:28,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 13:34:28,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 1046 proven. 1009 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-12-07 13:34:29,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:29,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2019-12-07 13:34:29,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062662938] [2019-12-07 13:34:29,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 13:34:29,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:29,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 13:34:29,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 13:34:29,223 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand 43 states. [2019-12-07 13:34:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:29,965 INFO L93 Difference]: Finished difference Result 914 states and 1216 transitions. [2019-12-07 13:34:29,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-12-07 13:34:29,965 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 118 [2019-12-07 13:34:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:29,968 INFO L225 Difference]: With dead ends: 914 [2019-12-07 13:34:29,968 INFO L226 Difference]: Without dead ends: 910 [2019-12-07 13:34:29,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2095, Invalid=4877, Unknown=0, NotChecked=0, Total=6972 [2019-12-07 13:34:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2019-12-07 13:34:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 182. [2019-12-07 13:34:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-12-07 13:34:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 222 transitions. [2019-12-07 13:34:29,980 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 222 transitions. Word has length 118 [2019-12-07 13:34:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:29,980 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 222 transitions. [2019-12-07 13:34:29,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 13:34:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 222 transitions. [2019-12-07 13:34:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-12-07 13:34:29,980 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:29,981 INFO L410 BasicCegarLoop]: trace histogram [59, 58, 40, 19, 1, 1, 1, 1, 1] [2019-12-07 13:34:30,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:30,181 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1086178059, now seen corresponding path program 22 times [2019-12-07 13:34:30,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:30,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861133612] [2019-12-07 13:34:30,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 2321 proven. 2812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:31,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861133612] [2019-12-07 13:34:31,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386672875] [2019-12-07 13:34:31,743 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:31,789 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:34:31,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:31,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 13:34:31,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 2320 proven. 551 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:34:32,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:32,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 21] total 99 [2019-12-07 13:34:32,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084856148] [2019-12-07 13:34:32,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-12-07 13:34:32,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-12-07 13:34:32,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1869, Invalid=8031, Unknown=0, NotChecked=0, Total=9900 [2019-12-07 13:34:32,427 INFO L87 Difference]: Start difference. First operand 182 states and 222 transitions. Second operand 100 states. [2019-12-07 13:34:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:33,250 INFO L93 Difference]: Finished difference Result 311 states and 392 transitions. [2019-12-07 13:34:33,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-07 13:34:33,250 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 181 [2019-12-07 13:34:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:33,251 INFO L225 Difference]: With dead ends: 311 [2019-12-07 13:34:33,251 INFO L226 Difference]: Without dead ends: 186 [2019-12-07 13:34:33,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5225 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3887, Invalid=15295, Unknown=0, NotChecked=0, Total=19182 [2019-12-07 13:34:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-07 13:34:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2019-12-07 13:34:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-12-07 13:34:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2019-12-07 13:34:33,260 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 181 [2019-12-07 13:34:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:33,260 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2019-12-07 13:34:33,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-12-07 13:34:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2019-12-07 13:34:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-12-07 13:34:33,261 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:33,261 INFO L410 BasicCegarLoop]: trace histogram [60, 59, 40, 20, 1, 1, 1, 1, 1] [2019-12-07 13:34:33,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:33,462 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:33,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2086805757, now seen corresponding path program 23 times [2019-12-07 13:34:33,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:33,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066758920] [2019-12-07 13:34:33,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 2324 proven. 2986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:35,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066758920] [2019-12-07 13:34:35,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510009305] [2019-12-07 13:34:35,060 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:35,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2019-12-07 13:34:35,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:35,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:34:35,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 2438 proven. 610 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:34:35,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:35,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 22] total 102 [2019-12-07 13:34:35,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453025258] [2019-12-07 13:34:35,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-12-07 13:34:35,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-12-07 13:34:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1974, Invalid=8532, Unknown=0, NotChecked=0, Total=10506 [2019-12-07 13:34:35,831 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand 103 states. [2019-12-07 13:34:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:36,745 INFO L93 Difference]: Finished difference Result 314 states and 395 transitions. [2019-12-07 13:34:36,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-07 13:34:36,745 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 184 [2019-12-07 13:34:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:36,746 INFO L225 Difference]: With dead ends: 314 [2019-12-07 13:34:36,746 INFO L226 Difference]: Without dead ends: 189 [2019-12-07 13:34:36,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5576 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4198, Invalid=16394, Unknown=0, NotChecked=0, Total=20592 [2019-12-07 13:34:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-07 13:34:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-12-07 13:34:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-12-07 13:34:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2019-12-07 13:34:36,756 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 184 [2019-12-07 13:34:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:36,757 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2019-12-07 13:34:36,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-12-07 13:34:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2019-12-07 13:34:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-12-07 13:34:36,758 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:36,758 INFO L410 BasicCegarLoop]: trace histogram [61, 60, 40, 21, 1, 1, 1, 1, 1] [2019-12-07 13:34:36,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:36,959 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:36,959 INFO L82 PathProgramCache]: Analyzing trace with hash 418555339, now seen corresponding path program 24 times [2019-12-07 13:34:36,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:36,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407749490] [2019-12-07 13:34:36,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 2327 proven. 3163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:38,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407749490] [2019-12-07 13:34:38,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610273904] [2019-12-07 13:34:38,631 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:38,742 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2019-12-07 13:34:38,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:38,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 62 conjunts are in the unsatisfiable core [2019-12-07 13:34:38,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 4146 proven. 1282 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-12-07 13:34:39,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:39,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 41] total 113 [2019-12-07 13:34:39,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138149298] [2019-12-07 13:34:39,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-12-07 13:34:39,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-12-07 13:34:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3474, Invalid=9408, Unknown=0, NotChecked=0, Total=12882 [2019-12-07 13:34:39,397 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand 114 states. [2019-12-07 13:34:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:40,380 INFO L93 Difference]: Finished difference Result 317 states and 398 transitions. [2019-12-07 13:34:40,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-07 13:34:40,380 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 187 [2019-12-07 13:34:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:40,381 INFO L225 Difference]: With dead ends: 317 [2019-12-07 13:34:40,381 INFO L226 Difference]: Without dead ends: 191 [2019-12-07 13:34:40,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8473 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5930, Invalid=18876, Unknown=0, NotChecked=0, Total=24806 [2019-12-07 13:34:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-07 13:34:40,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2019-12-07 13:34:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-12-07 13:34:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2019-12-07 13:34:40,389 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 187 [2019-12-07 13:34:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:40,389 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2019-12-07 13:34:40,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-12-07 13:34:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2019-12-07 13:34:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-12-07 13:34:40,390 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:40,390 INFO L410 BasicCegarLoop]: trace histogram [62, 61, 40, 22, 1, 1, 1, 1, 1] [2019-12-07 13:34:40,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:40,591 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:40,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1363065283, now seen corresponding path program 25 times [2019-12-07 13:34:40,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:40,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942390178] [2019-12-07 13:34:40,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 2330 proven. 3343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:42,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942390178] [2019-12-07 13:34:42,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199120251] [2019-12-07 13:34:42,313 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:42,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 13:34:42,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 2674 proven. 737 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:34:43,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:43,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 24] total 108 [2019-12-07 13:34:43,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288749901] [2019-12-07 13:34:43,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-12-07 13:34:43,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:43,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-12-07 13:34:43,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2199, Invalid=9573, Unknown=0, NotChecked=0, Total=11772 [2019-12-07 13:34:43,149 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand 109 states. [2019-12-07 13:34:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:44,205 INFO L93 Difference]: Finished difference Result 320 states and 401 transitions. [2019-12-07 13:34:44,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-07 13:34:44,205 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 190 [2019-12-07 13:34:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:44,207 INFO L225 Difference]: With dead ends: 320 [2019-12-07 13:34:44,207 INFO L226 Difference]: Without dead ends: 195 [2019-12-07 13:34:44,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4865, Invalid=18697, Unknown=0, NotChecked=0, Total=23562 [2019-12-07 13:34:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-07 13:34:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-12-07 13:34:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-12-07 13:34:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 234 transitions. [2019-12-07 13:34:44,219 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 234 transitions. Word has length 190 [2019-12-07 13:34:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:44,220 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 234 transitions. [2019-12-07 13:34:44,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-12-07 13:34:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 234 transitions. [2019-12-07 13:34:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-12-07 13:34:44,221 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:44,221 INFO L410 BasicCegarLoop]: trace histogram [63, 62, 40, 23, 1, 1, 1, 1, 1] [2019-12-07 13:34:44,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:44,422 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash -417171317, now seen corresponding path program 26 times [2019-12-07 13:34:44,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:44,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971478327] [2019-12-07 13:34:44,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2333 proven. 3526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:46,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971478327] [2019-12-07 13:34:46,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480498329] [2019-12-07 13:34:46,228 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:46,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:34:46,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:46,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 13:34:46,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 2792 proven. 805 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:34:47,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:47,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 25] total 111 [2019-12-07 13:34:47,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956596041] [2019-12-07 13:34:47,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-12-07 13:34:47,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-12-07 13:34:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2319, Invalid=10113, Unknown=0, NotChecked=0, Total=12432 [2019-12-07 13:34:47,140 INFO L87 Difference]: Start difference. First operand 194 states and 234 transitions. Second operand 112 states. [2019-12-07 13:34:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:48,273 INFO L93 Difference]: Finished difference Result 323 states and 404 transitions. [2019-12-07 13:34:48,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-07 13:34:48,273 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 193 [2019-12-07 13:34:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:48,274 INFO L225 Difference]: With dead ends: 323 [2019-12-07 13:34:48,274 INFO L226 Difference]: Without dead ends: 198 [2019-12-07 13:34:48,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6677 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5221, Invalid=19901, Unknown=0, NotChecked=0, Total=25122 [2019-12-07 13:34:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-07 13:34:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2019-12-07 13:34:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-12-07 13:34:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2019-12-07 13:34:48,283 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 193 [2019-12-07 13:34:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:48,283 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2019-12-07 13:34:48,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-12-07 13:34:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2019-12-07 13:34:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-12-07 13:34:48,284 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:48,284 INFO L410 BasicCegarLoop]: trace histogram [64, 63, 40, 24, 1, 1, 1, 1, 1] [2019-12-07 13:34:48,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:48,485 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash -570459267, now seen corresponding path program 27 times [2019-12-07 13:34:48,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:48,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764684544] [2019-12-07 13:34:48,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 2336 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:50,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764684544] [2019-12-07 13:34:50,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146278352] [2019-12-07 13:34:50,373 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:50,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2019-12-07 13:34:50,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:50,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 65 conjunts are in the unsatisfiable core [2019-12-07 13:34:50,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 4296 proven. 1681 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-12-07 13:34:51,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:51,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 41] total 116 [2019-12-07 13:34:51,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108634768] [2019-12-07 13:34:51,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 117 states [2019-12-07 13:34:51,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:51,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2019-12-07 13:34:51,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3552, Invalid=10020, Unknown=0, NotChecked=0, Total=13572 [2019-12-07 13:34:51,151 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand 117 states. [2019-12-07 13:34:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:52,392 INFO L93 Difference]: Finished difference Result 326 states and 407 transitions. [2019-12-07 13:34:52,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-12-07 13:34:52,393 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 196 [2019-12-07 13:34:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:52,393 INFO L225 Difference]: With dead ends: 326 [2019-12-07 13:34:52,393 INFO L226 Difference]: Without dead ends: 200 [2019-12-07 13:34:52,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8536 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6710, Invalid=21012, Unknown=0, NotChecked=0, Total=27722 [2019-12-07 13:34:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-12-07 13:34:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2019-12-07 13:34:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-07 13:34:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 240 transitions. [2019-12-07 13:34:52,402 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 240 transitions. Word has length 196 [2019-12-07 13:34:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:52,402 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 240 transitions. [2019-12-07 13:34:52,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 117 states. [2019-12-07 13:34:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 240 transitions. [2019-12-07 13:34:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-12-07 13:34:52,403 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:52,403 INFO L410 BasicCegarLoop]: trace histogram [65, 64, 40, 25, 1, 1, 1, 1, 1] [2019-12-07 13:34:52,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:52,603 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1621542069, now seen corresponding path program 28 times [2019-12-07 13:34:52,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:52,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508826809] [2019-12-07 13:34:52,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 2339 proven. 3901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:54,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508826809] [2019-12-07 13:34:54,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424126525] [2019-12-07 13:34:54,596 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:54,644 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:34:54,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:54,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 13:34:54,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:34:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3028 proven. 950 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:34:55,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:34:55,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 27] total 117 [2019-12-07 13:34:55,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013978247] [2019-12-07 13:34:55,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-12-07 13:34:55,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:34:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-12-07 13:34:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2574, Invalid=11232, Unknown=0, NotChecked=0, Total=13806 [2019-12-07 13:34:55,605 INFO L87 Difference]: Start difference. First operand 200 states and 240 transitions. Second operand 118 states. [2019-12-07 13:34:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:34:56,911 INFO L93 Difference]: Finished difference Result 329 states and 410 transitions. [2019-12-07 13:34:56,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-12-07 13:34:56,912 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 199 [2019-12-07 13:34:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:34:56,913 INFO L225 Difference]: With dead ends: 329 [2019-12-07 13:34:56,913 INFO L226 Difference]: Without dead ends: 204 [2019-12-07 13:34:56,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7451 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5978, Invalid=22414, Unknown=0, NotChecked=0, Total=28392 [2019-12-07 13:34:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-07 13:34:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2019-12-07 13:34:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-07 13:34:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 243 transitions. [2019-12-07 13:34:56,922 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 243 transitions. Word has length 199 [2019-12-07 13:34:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:34:56,922 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 243 transitions. [2019-12-07 13:34:56,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-12-07 13:34:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 243 transitions. [2019-12-07 13:34:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-12-07 13:34:56,923 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:34:56,923 INFO L410 BasicCegarLoop]: trace histogram [66, 65, 40, 26, 1, 1, 1, 1, 1] [2019-12-07 13:34:57,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:34:57,123 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:34:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:34:57,124 INFO L82 PathProgramCache]: Analyzing trace with hash 177258685, now seen corresponding path program 29 times [2019-12-07 13:34:57,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:34:57,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214911590] [2019-12-07 13:34:57,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:34:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:34:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 2342 proven. 4093 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:34:59,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214911590] [2019-12-07 13:34:59,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467536789] [2019-12-07 13:34:59,185 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:34:59,275 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2019-12-07 13:34:59,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:34:59,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 13:34:59,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3146 proven. 1027 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:35:00,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:00,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 28] total 120 [2019-12-07 13:35:00,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177685582] [2019-12-07 13:35:00,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2019-12-07 13:35:00,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2019-12-07 13:35:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=11811, Unknown=0, NotChecked=0, Total=14520 [2019-12-07 13:35:00,287 INFO L87 Difference]: Start difference. First operand 203 states and 243 transitions. Second operand 121 states. [2019-12-07 13:35:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:01,824 INFO L93 Difference]: Finished difference Result 332 states and 413 transitions. [2019-12-07 13:35:01,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-07 13:35:01,824 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 202 [2019-12-07 13:35:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:01,825 INFO L225 Difference]: With dead ends: 332 [2019-12-07 13:35:01,825 INFO L226 Difference]: Without dead ends: 207 [2019-12-07 13:35:01,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6383, Invalid=23719, Unknown=0, NotChecked=0, Total=30102 [2019-12-07 13:35:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-07 13:35:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2019-12-07 13:35:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-12-07 13:35:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2019-12-07 13:35:01,835 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 202 [2019-12-07 13:35:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:01,835 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2019-12-07 13:35:01,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 121 states. [2019-12-07 13:35:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2019-12-07 13:35:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-12-07 13:35:01,836 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:01,836 INFO L410 BasicCegarLoop]: trace histogram [67, 66, 40, 27, 1, 1, 1, 1, 1] [2019-12-07 13:35:02,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:02,037 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash -56431093, now seen corresponding path program 30 times [2019-12-07 13:35:02,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:02,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122286784] [2019-12-07 13:35:02,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 2345 proven. 4288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:04,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122286784] [2019-12-07 13:35:04,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532845143] [2019-12-07 13:35:04,187 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:35:04,283 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2019-12-07 13:35:04,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:04,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 13:35:04,286 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3264 proven. 1107 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:35:05,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:05,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 29] total 123 [2019-12-07 13:35:05,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901382069] [2019-12-07 13:35:05,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-12-07 13:35:05,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:05,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-12-07 13:35:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2849, Invalid=12403, Unknown=0, NotChecked=0, Total=15252 [2019-12-07 13:35:05,366 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 124 states. [2019-12-07 13:35:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:06,862 INFO L93 Difference]: Finished difference Result 335 states and 416 transitions. [2019-12-07 13:35:06,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-12-07 13:35:06,862 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 205 [2019-12-07 13:35:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:06,863 INFO L225 Difference]: With dead ends: 335 [2019-12-07 13:35:06,863 INFO L226 Difference]: Without dead ends: 210 [2019-12-07 13:35:06,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8241 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6811, Invalid=25051, Unknown=0, NotChecked=0, Total=31862 [2019-12-07 13:35:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-07 13:35:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2019-12-07 13:35:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-07 13:35:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 249 transitions. [2019-12-07 13:35:06,871 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 249 transitions. Word has length 205 [2019-12-07 13:35:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:06,872 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 249 transitions. [2019-12-07 13:35:06,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-12-07 13:35:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 249 transitions. [2019-12-07 13:35:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-12-07 13:35:06,872 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:06,872 INFO L410 BasicCegarLoop]: trace histogram [68, 67, 40, 28, 1, 1, 1, 1, 1] [2019-12-07 13:35:07,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:07,073 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:07,074 INFO L82 PathProgramCache]: Analyzing trace with hash 233379325, now seen corresponding path program 31 times [2019-12-07 13:35:07,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:07,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997719561] [2019-12-07 13:35:07,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 2348 proven. 4486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:09,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997719561] [2019-12-07 13:35:09,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520662382] [2019-12-07 13:35:09,307 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:35:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:09,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 13:35:09,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3382 proven. 1190 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:35:10,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:10,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 30] total 126 [2019-12-07 13:35:10,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987657546] [2019-12-07 13:35:10,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-12-07 13:35:10,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:10,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-12-07 13:35:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2994, Invalid=13008, Unknown=0, NotChecked=0, Total=16002 [2019-12-07 13:35:10,497 INFO L87 Difference]: Start difference. First operand 209 states and 249 transitions. Second operand 127 states. [2019-12-07 13:35:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:12,198 INFO L93 Difference]: Finished difference Result 338 states and 419 transitions. [2019-12-07 13:35:12,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-12-07 13:35:12,198 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 208 [2019-12-07 13:35:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:12,199 INFO L225 Difference]: With dead ends: 338 [2019-12-07 13:35:12,199 INFO L226 Difference]: Without dead ends: 213 [2019-12-07 13:35:12,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8636 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7262, Invalid=26410, Unknown=0, NotChecked=0, Total=33672 [2019-12-07 13:35:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-07 13:35:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2019-12-07 13:35:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-07 13:35:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2019-12-07 13:35:12,208 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 208 [2019-12-07 13:35:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:12,208 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2019-12-07 13:35:12,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-12-07 13:35:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2019-12-07 13:35:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-12-07 13:35:12,209 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:12,209 INFO L410 BasicCegarLoop]: trace histogram [69, 68, 40, 29, 1, 1, 1, 1, 1] [2019-12-07 13:35:12,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:12,410 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1091277003, now seen corresponding path program 32 times [2019-12-07 13:35:12,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:12,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103736445] [2019-12-07 13:35:12,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 2351 proven. 4687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:14,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103736445] [2019-12-07 13:35:14,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126649451] [2019-12-07 13:35:14,721 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:35:14,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:35:14,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:14,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 13:35:14,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3500 proven. 1276 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:35:15,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:15,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 31] total 129 [2019-12-07 13:35:15,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384131943] [2019-12-07 13:35:15,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-12-07 13:35:15,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-12-07 13:35:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3144, Invalid=13626, Unknown=0, NotChecked=0, Total=16770 [2019-12-07 13:35:15,972 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 130 states. [2019-12-07 13:35:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:17,697 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2019-12-07 13:35:17,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-12-07 13:35:17,697 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 211 [2019-12-07 13:35:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:17,698 INFO L225 Difference]: With dead ends: 341 [2019-12-07 13:35:17,698 INFO L226 Difference]: Without dead ends: 216 [2019-12-07 13:35:17,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9031 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7736, Invalid=27796, Unknown=0, NotChecked=0, Total=35532 [2019-12-07 13:35:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-07 13:35:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2019-12-07 13:35:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-07 13:35:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2019-12-07 13:35:17,707 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 211 [2019-12-07 13:35:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:17,707 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2019-12-07 13:35:17,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-12-07 13:35:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2019-12-07 13:35:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-12-07 13:35:17,708 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:17,708 INFO L410 BasicCegarLoop]: trace histogram [70, 69, 40, 30, 1, 1, 1, 1, 1] [2019-12-07 13:35:17,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:17,909 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:17,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:17,910 INFO L82 PathProgramCache]: Analyzing trace with hash -629376195, now seen corresponding path program 33 times [2019-12-07 13:35:17,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:17,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181587934] [2019-12-07 13:35:17,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 2354 proven. 4891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:20,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181587934] [2019-12-07 13:35:20,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318334800] [2019-12-07 13:35:20,312 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:35:20,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2019-12-07 13:35:20,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:20,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 13:35:20,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 3618 proven. 1365 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:35:21,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:21,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 32] total 132 [2019-12-07 13:35:21,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401505116] [2019-12-07 13:35:21,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 133 states [2019-12-07 13:35:21,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2019-12-07 13:35:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3299, Invalid=14257, Unknown=0, NotChecked=0, Total=17556 [2019-12-07 13:35:21,674 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand 133 states. [2019-12-07 13:35:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:23,659 INFO L93 Difference]: Finished difference Result 344 states and 425 transitions. [2019-12-07 13:35:23,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-12-07 13:35:23,660 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 214 [2019-12-07 13:35:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:23,661 INFO L225 Difference]: With dead ends: 344 [2019-12-07 13:35:23,661 INFO L226 Difference]: Without dead ends: 219 [2019-12-07 13:35:23,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9426 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8233, Invalid=29209, Unknown=0, NotChecked=0, Total=37442 [2019-12-07 13:35:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-07 13:35:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2019-12-07 13:35:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-07 13:35:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 258 transitions. [2019-12-07 13:35:23,670 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 258 transitions. Word has length 214 [2019-12-07 13:35:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:23,670 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 258 transitions. [2019-12-07 13:35:23,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 133 states. [2019-12-07 13:35:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 258 transitions. [2019-12-07 13:35:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-12-07 13:35:23,671 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:23,671 INFO L410 BasicCegarLoop]: trace histogram [71, 70, 40, 31, 1, 1, 1, 1, 1] [2019-12-07 13:35:23,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:23,872 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -174120053, now seen corresponding path program 34 times [2019-12-07 13:35:23,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:23,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336767794] [2019-12-07 13:35:23,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 2357 proven. 5098 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:26,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336767794] [2019-12-07 13:35:26,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608450149] [2019-12-07 13:35:26,441 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:35:26,491 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:35:26,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:26,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 13:35:26,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 3736 proven. 1457 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:35:27,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:27,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 33] total 135 [2019-12-07 13:35:27,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895513064] [2019-12-07 13:35:27,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-12-07 13:35:27,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:27,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-12-07 13:35:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3459, Invalid=14901, Unknown=0, NotChecked=0, Total=18360 [2019-12-07 13:35:27,821 INFO L87 Difference]: Start difference. First operand 218 states and 258 transitions. Second operand 136 states. [2019-12-07 13:35:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:29,828 INFO L93 Difference]: Finished difference Result 347 states and 428 transitions. [2019-12-07 13:35:29,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-12-07 13:35:29,828 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 217 [2019-12-07 13:35:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:29,829 INFO L225 Difference]: With dead ends: 347 [2019-12-07 13:35:29,829 INFO L226 Difference]: Without dead ends: 222 [2019-12-07 13:35:29,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9821 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8753, Invalid=30649, Unknown=0, NotChecked=0, Total=39402 [2019-12-07 13:35:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-07 13:35:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2019-12-07 13:35:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-07 13:35:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2019-12-07 13:35:29,838 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 217 [2019-12-07 13:35:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:29,838 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2019-12-07 13:35:29,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-12-07 13:35:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2019-12-07 13:35:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-12-07 13:35:29,839 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:29,839 INFO L410 BasicCegarLoop]: trace histogram [72, 71, 40, 32, 1, 1, 1, 1, 1] [2019-12-07 13:35:30,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:30,040 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:30,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1145114499, now seen corresponding path program 35 times [2019-12-07 13:35:30,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:30,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343009529] [2019-12-07 13:35:30,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 2360 proven. 5308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:32,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343009529] [2019-12-07 13:35:32,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828386756] [2019-12-07 13:35:32,633 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:35:32,739 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2019-12-07 13:35:32,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:32,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 13:35:32,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 3854 proven. 1552 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:35:34,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:34,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 34] total 138 [2019-12-07 13:35:34,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305444372] [2019-12-07 13:35:34,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 139 states [2019-12-07 13:35:34,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2019-12-07 13:35:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3624, Invalid=15558, Unknown=0, NotChecked=0, Total=19182 [2019-12-07 13:35:34,150 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand 139 states. [2019-12-07 13:35:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:35:36,255 INFO L93 Difference]: Finished difference Result 350 states and 431 transitions. [2019-12-07 13:35:36,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-12-07 13:35:36,255 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 220 [2019-12-07 13:35:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:35:36,256 INFO L225 Difference]: With dead ends: 350 [2019-12-07 13:35:36,256 INFO L226 Difference]: Without dead ends: 225 [2019-12-07 13:35:36,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10216 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9296, Invalid=32116, Unknown=0, NotChecked=0, Total=41412 [2019-12-07 13:35:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-07 13:35:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2019-12-07 13:35:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-12-07 13:35:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 264 transitions. [2019-12-07 13:35:36,264 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 264 transitions. Word has length 220 [2019-12-07 13:35:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:35:36,265 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 264 transitions. [2019-12-07 13:35:36,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 139 states. [2019-12-07 13:35:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 264 transitions. [2019-12-07 13:35:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-12-07 13:35:36,266 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:35:36,266 INFO L410 BasicCegarLoop]: trace histogram [73, 72, 40, 33, 1, 1, 1, 1, 1] [2019-12-07 13:35:36,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:35:36,467 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:35:36,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:35:36,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1435916725, now seen corresponding path program 36 times [2019-12-07 13:35:36,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:35:36,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776642125] [2019-12-07 13:35:36,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:35:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:35:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 2363 proven. 5521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:35:39,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776642125] [2019-12-07 13:35:39,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309886216] [2019-12-07 13:35:39,154 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:35:39,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2019-12-07 13:35:39,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:35:39,263 INFO L264 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 74 conjunts are in the unsatisfiable core [2019-12-07 13:35:39,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:35:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 4584 proven. 3202 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-12-07 13:35:39,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:35:39,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 41] total 125 [2019-12-07 13:35:39,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447493961] [2019-12-07 13:35:39,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-12-07 13:35:39,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:35:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-12-07 13:35:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4056, Invalid=11694, Unknown=0, NotChecked=0, Total=15750 [2019-12-07 13:35:39,795 INFO L87 Difference]: Start difference. First operand 224 states and 264 transitions. Second operand 126 states. [2019-12-07 13:36:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:22,568 INFO L93 Difference]: Finished difference Result 16136 states and 21407 transitions. [2019-12-07 13:36:22,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2019-12-07 13:36:22,569 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 223 [2019-12-07 13:36:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:22,618 INFO L225 Difference]: With dead ends: 16136 [2019-12-07 13:36:22,618 INFO L226 Difference]: Without dead ends: 15641 [2019-12-07 13:36:22,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34038 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=32763, Invalid=110499, Unknown=0, NotChecked=0, Total=143262 [2019-12-07 13:36:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15641 states. [2019-12-07 13:36:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15641 to 2099. [2019-12-07 13:36:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2099 states. [2019-12-07 13:36:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2771 transitions. [2019-12-07 13:36:22,799 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2771 transitions. Word has length 223 [2019-12-07 13:36:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:22,800 INFO L462 AbstractCegarLoop]: Abstraction has 2099 states and 2771 transitions. [2019-12-07 13:36:22,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-12-07 13:36:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2771 transitions. [2019-12-07 13:36:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-12-07 13:36:22,802 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:22,802 INFO L410 BasicCegarLoop]: trace histogram [74, 73, 40, 34, 1, 1, 1, 1, 1] [2019-12-07 13:36:23,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:23,002 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:23,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:23,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1775995459, now seen corresponding path program 37 times [2019-12-07 13:36:23,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:23,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052425186] [2019-12-07 13:36:23,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 2366 proven. 5737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:25,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052425186] [2019-12-07 13:36:25,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70223313] [2019-12-07 13:36:25,793 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:36:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:25,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 13:36:25,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 4090 proven. 1751 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:36:27,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:27,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 36] total 144 [2019-12-07 13:36:27,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658328088] [2019-12-07 13:36:27,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 145 states [2019-12-07 13:36:27,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2019-12-07 13:36:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3969, Invalid=16911, Unknown=0, NotChecked=0, Total=20880 [2019-12-07 13:36:27,403 INFO L87 Difference]: Start difference. First operand 2099 states and 2771 transitions. Second operand 145 states. [2019-12-07 13:36:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:29,791 INFO L93 Difference]: Finished difference Result 2228 states and 2941 transitions. [2019-12-07 13:36:29,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-12-07 13:36:29,791 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 226 [2019-12-07 13:36:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:29,792 INFO L225 Difference]: With dead ends: 2228 [2019-12-07 13:36:29,792 INFO L226 Difference]: Without dead ends: 231 [2019-12-07 13:36:29,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11006 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10451, Invalid=35131, Unknown=0, NotChecked=0, Total=45582 [2019-12-07 13:36:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-07 13:36:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2019-12-07 13:36:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-12-07 13:36:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 270 transitions. [2019-12-07 13:36:29,802 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 270 transitions. Word has length 226 [2019-12-07 13:36:29,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:29,802 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 270 transitions. [2019-12-07 13:36:29,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 145 states. [2019-12-07 13:36:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 270 transitions. [2019-12-07 13:36:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-12-07 13:36:29,802 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:29,803 INFO L410 BasicCegarLoop]: trace histogram [75, 74, 40, 35, 1, 1, 1, 1, 1] [2019-12-07 13:36:30,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:30,003 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1233708789, now seen corresponding path program 38 times [2019-12-07 13:36:30,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:30,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256417426] [2019-12-07 13:36:30,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 2369 proven. 5956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:32,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256417426] [2019-12-07 13:36:32,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394663087] [2019-12-07 13:36:32,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:36:32,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:36:32,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:32,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-07 13:36:32,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 4208 proven. 1855 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:36:34,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:34,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 37] total 147 [2019-12-07 13:36:34,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671644240] [2019-12-07 13:36:34,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-12-07 13:36:34,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-12-07 13:36:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4149, Invalid=17607, Unknown=0, NotChecked=0, Total=21756 [2019-12-07 13:36:34,596 INFO L87 Difference]: Start difference. First operand 230 states and 270 transitions. Second operand 148 states. [2019-12-07 13:36:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:37,373 INFO L93 Difference]: Finished difference Result 359 states and 440 transitions. [2019-12-07 13:36:37,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-12-07 13:36:37,373 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 229 [2019-12-07 13:36:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:37,374 INFO L225 Difference]: With dead ends: 359 [2019-12-07 13:36:37,374 INFO L226 Difference]: Without dead ends: 234 [2019-12-07 13:36:37,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11401 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11063, Invalid=36679, Unknown=0, NotChecked=0, Total=47742 [2019-12-07 13:36:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-07 13:36:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2019-12-07 13:36:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-12-07 13:36:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2019-12-07 13:36:37,383 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 229 [2019-12-07 13:36:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:37,383 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2019-12-07 13:36:37,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-12-07 13:36:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2019-12-07 13:36:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-12-07 13:36:37,384 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:37,384 INFO L410 BasicCegarLoop]: trace histogram [76, 75, 40, 36, 1, 1, 1, 1, 1] [2019-12-07 13:36:37,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:37,585 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:37,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash 656476925, now seen corresponding path program 39 times [2019-12-07 13:36:37,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:37,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841926046] [2019-12-07 13:36:37,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 2372 proven. 6178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:40,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841926046] [2019-12-07 13:36:40,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421182903] [2019-12-07 13:36:40,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:36:40,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2019-12-07 13:36:40,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:40,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 13:36:40,714 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4326 proven. 1962 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:36:42,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:42,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 38] total 150 [2019-12-07 13:36:42,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951361748] [2019-12-07 13:36:42,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 151 states [2019-12-07 13:36:42,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:42,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2019-12-07 13:36:42,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4334, Invalid=18316, Unknown=0, NotChecked=0, Total=22650 [2019-12-07 13:36:42,410 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand 151 states. [2019-12-07 13:36:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:45,695 INFO L93 Difference]: Finished difference Result 362 states and 443 transitions. [2019-12-07 13:36:45,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-12-07 13:36:45,696 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 232 [2019-12-07 13:36:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:45,696 INFO L225 Difference]: With dead ends: 362 [2019-12-07 13:36:45,696 INFO L226 Difference]: Without dead ends: 237 [2019-12-07 13:36:45,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11796 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=11698, Invalid=38254, Unknown=0, NotChecked=0, Total=49952 [2019-12-07 13:36:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-07 13:36:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2019-12-07 13:36:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-12-07 13:36:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 276 transitions. [2019-12-07 13:36:45,705 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 276 transitions. Word has length 232 [2019-12-07 13:36:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:45,705 INFO L462 AbstractCegarLoop]: Abstraction has 236 states and 276 transitions. [2019-12-07 13:36:45,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 151 states. [2019-12-07 13:36:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 276 transitions. [2019-12-07 13:36:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-12-07 13:36:45,706 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:45,706 INFO L410 BasicCegarLoop]: trace histogram [77, 76, 40, 37, 1, 1, 1, 1, 1] [2019-12-07 13:36:45,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:45,907 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash -137135157, now seen corresponding path program 40 times [2019-12-07 13:36:45,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:45,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751974770] [2019-12-07 13:36:45,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 2375 proven. 6403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:49,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751974770] [2019-12-07 13:36:49,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327436828] [2019-12-07 13:36:49,013 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:36:49,073 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:36:49,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:49,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-07 13:36:49,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4444 proven. 2072 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:36:50,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:50,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 39] total 153 [2019-12-07 13:36:50,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6632247] [2019-12-07 13:36:50,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-12-07 13:36:50,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-12-07 13:36:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4524, Invalid=19038, Unknown=0, NotChecked=0, Total=23562 [2019-12-07 13:36:50,864 INFO L87 Difference]: Start difference. First operand 236 states and 276 transitions. Second operand 154 states. [2019-12-07 13:36:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:36:53,892 INFO L93 Difference]: Finished difference Result 365 states and 446 transitions. [2019-12-07 13:36:53,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-12-07 13:36:53,893 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 235 [2019-12-07 13:36:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:36:53,894 INFO L225 Difference]: With dead ends: 365 [2019-12-07 13:36:53,894 INFO L226 Difference]: Without dead ends: 240 [2019-12-07 13:36:53,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12191 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=12356, Invalid=39856, Unknown=0, NotChecked=0, Total=52212 [2019-12-07 13:36:53,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-07 13:36:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2019-12-07 13:36:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-12-07 13:36:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 279 transitions. [2019-12-07 13:36:53,903 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 279 transitions. Word has length 235 [2019-12-07 13:36:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:36:53,903 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 279 transitions. [2019-12-07 13:36:53,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-12-07 13:36:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 279 transitions. [2019-12-07 13:36:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-12-07 13:36:53,904 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:36:53,904 INFO L410 BasicCegarLoop]: trace histogram [78, 77, 40, 38, 1, 1, 1, 1, 1] [2019-12-07 13:36:54,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:36:54,105 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:36:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:36:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1160294461, now seen corresponding path program 41 times [2019-12-07 13:36:54,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:36:54,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795476812] [2019-12-07 13:36:54,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:36:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:36:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 2378 proven. 6631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:36:57,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795476812] [2019-12-07 13:36:57,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52343532] [2019-12-07 13:36:57,335 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:36:57,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2019-12-07 13:36:57,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:36:57,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 13:36:57,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:36:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4562 proven. 2185 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:36:59,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:36:59,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 40] total 156 [2019-12-07 13:36:59,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787217684] [2019-12-07 13:36:59,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 157 states [2019-12-07 13:36:59,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:36:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2019-12-07 13:36:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4719, Invalid=19773, Unknown=0, NotChecked=0, Total=24492 [2019-12-07 13:36:59,321 INFO L87 Difference]: Start difference. First operand 239 states and 279 transitions. Second operand 157 states. [2019-12-07 13:37:02,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:02,238 INFO L93 Difference]: Finished difference Result 368 states and 449 transitions. [2019-12-07 13:37:02,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-12-07 13:37:02,239 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 238 [2019-12-07 13:37:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:02,240 INFO L225 Difference]: With dead ends: 368 [2019-12-07 13:37:02,240 INFO L226 Difference]: Without dead ends: 243 [2019-12-07 13:37:02,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12586 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=13037, Invalid=41485, Unknown=0, NotChecked=0, Total=54522 [2019-12-07 13:37:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-07 13:37:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2019-12-07 13:37:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-12-07 13:37:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 282 transitions. [2019-12-07 13:37:02,249 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 282 transitions. Word has length 238 [2019-12-07 13:37:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:02,249 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 282 transitions. [2019-12-07 13:37:02,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 157 states. [2019-12-07 13:37:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 282 transitions. [2019-12-07 13:37:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-12-07 13:37:02,250 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:02,250 INFO L410 BasicCegarLoop]: trace histogram [79, 78, 40, 39, 1, 1, 1, 1, 1] [2019-12-07 13:37:02,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:02,451 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1819619701, now seen corresponding path program 42 times [2019-12-07 13:37:02,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:02,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986709046] [2019-12-07 13:37:02,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4680 proven. 2301 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:37:02,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986709046] [2019-12-07 13:37:02,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040027060] [2019-12-07 13:37:02,995 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:03,114 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2019-12-07 13:37:03,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:37:03,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 13:37:03,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:37:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4680 proven. 2301 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:37:03,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:37:03,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2019-12-07 13:37:03,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083795689] [2019-12-07 13:37:03,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-07 13:37:03,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:37:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-07 13:37:03,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 13:37:03,154 INFO L87 Difference]: Start difference. First operand 242 states and 282 transitions. Second operand 42 states. [2019-12-07 13:37:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:03,226 INFO L93 Difference]: Finished difference Result 371 states and 452 transitions. [2019-12-07 13:37:03,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-07 13:37:03,226 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 241 [2019-12-07 13:37:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:03,227 INFO L225 Difference]: With dead ends: 371 [2019-12-07 13:37:03,227 INFO L226 Difference]: Without dead ends: 246 [2019-12-07 13:37:03,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 13:37:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-07 13:37:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2019-12-07 13:37:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-12-07 13:37:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 285 transitions. [2019-12-07 13:37:03,235 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 285 transitions. Word has length 241 [2019-12-07 13:37:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:03,235 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 285 transitions. [2019-12-07 13:37:03,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-07 13:37:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 285 transitions. [2019-12-07 13:37:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-12-07 13:37:03,236 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:03,236 INFO L410 BasicCegarLoop]: trace histogram [80, 79, 40, 40, 1, 1, 1, 1, 1] [2019-12-07 13:37:03,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:03,437 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:03,438 INFO L82 PathProgramCache]: Analyzing trace with hash 531588477, now seen corresponding path program 43 times [2019-12-07 13:37:03,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:03,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633533344] [2019-12-07 13:37:03,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 0 proven. 7060 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2019-12-07 13:37:04,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633533344] [2019-12-07 13:37:04,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12511503] [2019-12-07 13:37:04,041 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:04,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 13:37:04,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:37:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4798 proven. 2420 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2019-12-07 13:37:05,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:37:05,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 84 [2019-12-07 13:37:05,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128041230] [2019-12-07 13:37:05,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-12-07 13:37:05,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:37:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-12-07 13:37:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1768, Invalid=5372, Unknown=0, NotChecked=0, Total=7140 [2019-12-07 13:37:05,150 INFO L87 Difference]: Start difference. First operand 245 states and 285 transitions. Second operand 85 states. [2019-12-07 13:37:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:07,839 INFO L93 Difference]: Finished difference Result 1720 states and 2263 transitions. [2019-12-07 13:37:07,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2019-12-07 13:37:07,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 244 [2019-12-07 13:37:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:07,845 INFO L225 Difference]: With dead ends: 1720 [2019-12-07 13:37:07,845 INFO L226 Difference]: Without dead ends: 1595 [2019-12-07 13:37:07,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5945 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6366, Invalid=22026, Unknown=0, NotChecked=0, Total=28392 [2019-12-07 13:37:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2019-12-07 13:37:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 311. [2019-12-07 13:37:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-12-07 13:37:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 372 transitions. [2019-12-07 13:37:07,868 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 372 transitions. Word has length 244 [2019-12-07 13:37:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:07,868 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 372 transitions. [2019-12-07 13:37:07,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-12-07 13:37:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 372 transitions. [2019-12-07 13:37:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-12-07 13:37:07,869 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:07,869 INFO L410 BasicCegarLoop]: trace histogram [82, 81, 41, 41, 1, 1, 1, 1, 1] [2019-12-07 13:37:08,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:08,070 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1426807743, now seen corresponding path program 44 times [2019-12-07 13:37:08,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:08,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819209225] [2019-12-07 13:37:08,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 0 proven. 7421 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2019-12-07 13:37:08,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819209225] [2019-12-07 13:37:08,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803804510] [2019-12-07 13:37:08,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:08,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:37:08,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:37:08,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-07 13:37:08,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:37:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 5041 proven. 2542 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2019-12-07 13:37:09,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:37:09,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 86 [2019-12-07 13:37:09,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810630507] [2019-12-07 13:37:09,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-12-07 13:37:09,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:37:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-12-07 13:37:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1853, Invalid=5629, Unknown=0, NotChecked=0, Total=7482 [2019-12-07 13:37:09,888 INFO L87 Difference]: Start difference. First operand 311 states and 372 transitions. Second operand 87 states. [2019-12-07 13:37:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:15,064 INFO L93 Difference]: Finished difference Result 1910 states and 2516 transitions. [2019-12-07 13:37:15,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2019-12-07 13:37:15,065 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 250 [2019-12-07 13:37:15,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:15,071 INFO L225 Difference]: With dead ends: 1910 [2019-12-07 13:37:15,071 INFO L226 Difference]: Without dead ends: 1722 [2019-12-07 13:37:15,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6237 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6668, Invalid=23088, Unknown=0, NotChecked=0, Total=29756 [2019-12-07 13:37:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2019-12-07 13:37:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 317. [2019-12-07 13:37:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-12-07 13:37:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 379 transitions. [2019-12-07 13:37:15,098 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 379 transitions. Word has length 250 [2019-12-07 13:37:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:15,099 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 379 transitions. [2019-12-07 13:37:15,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-12-07 13:37:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 379 transitions. [2019-12-07 13:37:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-12-07 13:37:15,099 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:15,100 INFO L410 BasicCegarLoop]: trace histogram [84, 83, 42, 42, 1, 1, 1, 1, 1] [2019-12-07 13:37:15,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:15,300 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1206826819, now seen corresponding path program 45 times [2019-12-07 13:37:15,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:15,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671060197] [2019-12-07 13:37:15,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 0 proven. 7791 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2019-12-07 13:37:15,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671060197] [2019-12-07 13:37:15,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723762780] [2019-12-07 13:37:15,983 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:16,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2019-12-07 13:37:16,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:37:16,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 86 conjunts are in the unsatisfiable core [2019-12-07 13:37:16,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:37:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 5209 proven. 5126 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-12-07 13:37:16,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:37:16,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 53 [2019-12-07 13:37:16,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661866494] [2019-12-07 13:37:16,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-12-07 13:37:16,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:37:16,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-12-07 13:37:16,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 13:37:16,384 INFO L87 Difference]: Start difference. First operand 317 states and 379 transitions. Second operand 54 states. [2019-12-07 13:37:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:19,616 INFO L93 Difference]: Finished difference Result 2235 states and 2954 transitions. [2019-12-07 13:37:19,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2019-12-07 13:37:19,616 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 256 [2019-12-07 13:37:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:19,625 INFO L225 Difference]: With dead ends: 2235 [2019-12-07 13:37:19,625 INFO L226 Difference]: Without dead ends: 2231 [2019-12-07 13:37:19,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7901, Invalid=15355, Unknown=0, NotChecked=0, Total=23256 [2019-12-07 13:37:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2019-12-07 13:37:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 284. [2019-12-07 13:37:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2019-12-07 13:37:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 335 transitions. [2019-12-07 13:37:19,652 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 335 transitions. Word has length 256 [2019-12-07 13:37:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:19,653 INFO L462 AbstractCegarLoop]: Abstraction has 284 states and 335 transitions. [2019-12-07 13:37:19,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-12-07 13:37:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 335 transitions. [2019-12-07 13:37:19,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-12-07 13:37:19,654 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:19,654 INFO L410 BasicCegarLoop]: trace histogram [93, 92, 51, 42, 1, 1, 1, 1, 1] [2019-12-07 13:37:19,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:19,855 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash -717938931, now seen corresponding path program 46 times [2019-12-07 13:37:19,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:19,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305990387] [2019-12-07 13:37:19,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 3853 proven. 8981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:37:24,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305990387] [2019-12-07 13:37:24,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085646241] [2019-12-07 13:37:24,155 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:24,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:37:24,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:37:24,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 13:37:24,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:37:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 6442 proven. 2667 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-12-07 13:37:26,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:37:26,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 44] total 179 [2019-12-07 13:37:26,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079996124] [2019-12-07 13:37:26,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 180 states [2019-12-07 13:37:26,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:37:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2019-12-07 13:37:26,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6055, Invalid=26165, Unknown=0, NotChecked=0, Total=32220 [2019-12-07 13:37:26,569 INFO L87 Difference]: Start difference. First operand 284 states and 335 transitions. Second operand 180 states. [2019-12-07 13:37:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:30,154 INFO L93 Difference]: Finished difference Result 446 states and 549 transitions. [2019-12-07 13:37:30,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-12-07 13:37:30,155 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 283 [2019-12-07 13:37:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:30,156 INFO L225 Difference]: With dead ends: 446 [2019-12-07 13:37:30,156 INFO L226 Difference]: Without dead ends: 288 [2019-12-07 13:37:30,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16498 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=16497, Invalid=53463, Unknown=0, NotChecked=0, Total=69960 [2019-12-07 13:37:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2019-12-07 13:37:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2019-12-07 13:37:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2019-12-07 13:37:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 338 transitions. [2019-12-07 13:37:30,179 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 338 transitions. Word has length 283 [2019-12-07 13:37:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:30,179 INFO L462 AbstractCegarLoop]: Abstraction has 287 states and 338 transitions. [2019-12-07 13:37:30,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 180 states. [2019-12-07 13:37:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 338 transitions. [2019-12-07 13:37:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-12-07 13:37:30,180 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:30,180 INFO L410 BasicCegarLoop]: trace histogram [94, 93, 51, 43, 1, 1, 1, 1, 1] [2019-12-07 13:37:30,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:30,381 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:30,381 INFO L82 PathProgramCache]: Analyzing trace with hash 51963775, now seen corresponding path program 47 times [2019-12-07 13:37:30,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:30,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269589851] [2019-12-07 13:37:30,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 3856 proven. 9257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:37:34,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269589851] [2019-12-07 13:37:34,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798682021] [2019-12-07 13:37:34,799 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:34,952 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 94 check-sat command(s) [2019-12-07 13:37:34,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:37:34,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 13:37:34,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:37:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6593 proven. 2795 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-12-07 13:37:37,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:37:37,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 45] total 182 [2019-12-07 13:37:37,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950440871] [2019-12-07 13:37:37,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 183 states [2019-12-07 13:37:37,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:37:37,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2019-12-07 13:37:37,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6275, Invalid=27031, Unknown=0, NotChecked=0, Total=33306 [2019-12-07 13:37:37,382 INFO L87 Difference]: Start difference. First operand 287 states and 338 transitions. Second operand 183 states. [2019-12-07 13:37:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:42,092 INFO L93 Difference]: Finished difference Result 449 states and 552 transitions. [2019-12-07 13:37:42,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-12-07 13:37:42,092 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 286 [2019-12-07 13:37:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:42,093 INFO L225 Difference]: With dead ends: 449 [2019-12-07 13:37:42,093 INFO L226 Difference]: Without dead ends: 291 [2019-12-07 13:37:42,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16948 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=17293, Invalid=55337, Unknown=0, NotChecked=0, Total=72630 [2019-12-07 13:37:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-12-07 13:37:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2019-12-07 13:37:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-12-07 13:37:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 341 transitions. [2019-12-07 13:37:42,116 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 341 transitions. Word has length 286 [2019-12-07 13:37:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:42,116 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 341 transitions. [2019-12-07 13:37:42,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 183 states. [2019-12-07 13:37:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 341 transitions. [2019-12-07 13:37:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2019-12-07 13:37:42,117 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:42,117 INFO L410 BasicCegarLoop]: trace histogram [95, 94, 51, 44, 1, 1, 1, 1, 1] [2019-12-07 13:37:42,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:42,318 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:42,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1098117581, now seen corresponding path program 48 times [2019-12-07 13:37:42,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:42,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70705306] [2019-12-07 13:37:42,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 3859 proven. 9536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:37:46,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70705306] [2019-12-07 13:37:46,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667799843] [2019-12-07 13:37:46,863 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:47,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2019-12-07 13:37:47,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:37:47,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 46 conjunts are in the unsatisfiable core [2019-12-07 13:37:47,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:37:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6744 proven. 2926 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-12-07 13:37:49,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:37:49,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 46] total 185 [2019-12-07 13:37:49,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928171239] [2019-12-07 13:37:49,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 186 states [2019-12-07 13:37:49,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:37:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2019-12-07 13:37:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6500, Invalid=27910, Unknown=0, NotChecked=0, Total=34410 [2019-12-07 13:37:49,533 INFO L87 Difference]: Start difference. First operand 290 states and 341 transitions. Second operand 186 states. [2019-12-07 13:37:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:37:53,479 INFO L93 Difference]: Finished difference Result 452 states and 555 transitions. [2019-12-07 13:37:53,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-12-07 13:37:53,480 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 289 [2019-12-07 13:37:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:37:53,481 INFO L225 Difference]: With dead ends: 452 [2019-12-07 13:37:53,481 INFO L226 Difference]: Without dead ends: 294 [2019-12-07 13:37:53,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17398 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=18112, Invalid=57238, Unknown=0, NotChecked=0, Total=75350 [2019-12-07 13:37:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-12-07 13:37:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2019-12-07 13:37:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2019-12-07 13:37:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 344 transitions. [2019-12-07 13:37:53,504 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 344 transitions. Word has length 289 [2019-12-07 13:37:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:37:53,504 INFO L462 AbstractCegarLoop]: Abstraction has 293 states and 344 transitions. [2019-12-07 13:37:53,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 186 states. [2019-12-07 13:37:53,505 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 344 transitions. [2019-12-07 13:37:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-12-07 13:37:53,505 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:37:53,505 INFO L410 BasicCegarLoop]: trace histogram [96, 95, 51, 45, 1, 1, 1, 1, 1] [2019-12-07 13:37:53,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:37:53,706 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:37:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:37:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1511514945, now seen corresponding path program 49 times [2019-12-07 13:37:53,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:37:53,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931456497] [2019-12-07 13:37:53,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:37:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 3862 proven. 9818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:37:58,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931456497] [2019-12-07 13:37:58,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731651670] [2019-12-07 13:37:58,366 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:37:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:37:58,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-07 13:37:58,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:38:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 6895 proven. 3060 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-12-07 13:38:01,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:38:01,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 47] total 188 [2019-12-07 13:38:01,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687407344] [2019-12-07 13:38:01,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 189 states [2019-12-07 13:38:01,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:38:01,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2019-12-07 13:38:01,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6730, Invalid=28802, Unknown=0, NotChecked=0, Total=35532 [2019-12-07 13:38:01,049 INFO L87 Difference]: Start difference. First operand 293 states and 344 transitions. Second operand 189 states. [2019-12-07 13:38:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:38:05,181 INFO L93 Difference]: Finished difference Result 455 states and 558 transitions. [2019-12-07 13:38:05,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-12-07 13:38:05,181 INFO L78 Accepts]: Start accepts. Automaton has 189 states. Word has length 292 [2019-12-07 13:38:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:38:05,182 INFO L225 Difference]: With dead ends: 455 [2019-12-07 13:38:05,182 INFO L226 Difference]: Without dead ends: 297 [2019-12-07 13:38:05,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17848 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=18954, Invalid=59166, Unknown=0, NotChecked=0, Total=78120 [2019-12-07 13:38:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-07 13:38:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2019-12-07 13:38:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-12-07 13:38:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 347 transitions. [2019-12-07 13:38:05,208 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 347 transitions. Word has length 292 [2019-12-07 13:38:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:38:05,208 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 347 transitions. [2019-12-07 13:38:05,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 189 states. [2019-12-07 13:38:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 347 transitions. [2019-12-07 13:38:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2019-12-07 13:38:05,209 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:38:05,209 INFO L410 BasicCegarLoop]: trace histogram [97, 96, 51, 46, 1, 1, 1, 1, 1] [2019-12-07 13:38:05,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:38:05,410 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:38:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:38:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1871072115, now seen corresponding path program 50 times [2019-12-07 13:38:05,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:38:05,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932653605] [2019-12-07 13:38:05,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:38:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:38:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 3865 proven. 10103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:38:10,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932653605] [2019-12-07 13:38:10,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586748985] [2019-12-07 13:38:10,194 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:38:10,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:38:10,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:38:10,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 48 conjunts are in the unsatisfiable core [2019-12-07 13:38:10,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:38:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 7046 proven. 3197 refuted. 0 times theorem prover too weak. 3725 trivial. 0 not checked. [2019-12-07 13:38:12,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:38:12,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 48] total 191 [2019-12-07 13:38:12,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870471379] [2019-12-07 13:38:12,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 192 states [2019-12-07 13:38:12,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:38:12,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2019-12-07 13:38:12,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6965, Invalid=29707, Unknown=0, NotChecked=0, Total=36672 [2019-12-07 13:38:12,997 INFO L87 Difference]: Start difference. First operand 296 states and 347 transitions. Second operand 192 states. [2019-12-07 13:38:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:38:20,133 INFO L93 Difference]: Finished difference Result 458 states and 561 transitions. [2019-12-07 13:38:20,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-12-07 13:38:20,133 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 295 [2019-12-07 13:38:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:38:20,134 INFO L225 Difference]: With dead ends: 458 [2019-12-07 13:38:20,134 INFO L226 Difference]: Without dead ends: 300 [2019-12-07 13:38:20,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18298 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=19819, Invalid=61121, Unknown=0, NotChecked=0, Total=80940 [2019-12-07 13:38:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-07 13:38:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2019-12-07 13:38:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2019-12-07 13:38:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 350 transitions. [2019-12-07 13:38:20,160 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 350 transitions. Word has length 295 [2019-12-07 13:38:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:38:20,160 INFO L462 AbstractCegarLoop]: Abstraction has 299 states and 350 transitions. [2019-12-07 13:38:20,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 192 states. [2019-12-07 13:38:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 350 transitions. [2019-12-07 13:38:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-12-07 13:38:20,161 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:38:20,161 INFO L410 BasicCegarLoop]: trace histogram [98, 97, 51, 47, 1, 1, 1, 1, 1] [2019-12-07 13:38:20,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:38:20,362 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:38:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:38:20,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1790287361, now seen corresponding path program 51 times [2019-12-07 13:38:20,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:38:20,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708644409] [2019-12-07 13:38:20,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:38:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:38:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 3868 proven. 10391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:38:25,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708644409] [2019-12-07 13:38:25,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406631523] [2019-12-07 13:38:25,308 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:38:25,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2019-12-07 13:38:25,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:38:25,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 109 conjunts are in the unsatisfiable core [2019-12-07 13:38:25,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:38:28,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:38:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 7186 proven. 3876 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2019-12-07 13:38:29,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:38:29,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 56] total 201 [2019-12-07 13:38:29,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653341047] [2019-12-07 13:38:29,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 201 states [2019-12-07 13:38:29,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:38:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2019-12-07 13:38:29,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6091, Invalid=34109, Unknown=0, NotChecked=0, Total=40200 [2019-12-07 13:38:29,156 INFO L87 Difference]: Start difference. First operand 299 states and 350 transitions. Second operand 201 states. [2019-12-07 13:38:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:38:52,214 INFO L93 Difference]: Finished difference Result 4665 states and 6088 transitions. [2019-12-07 13:38:52,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2019-12-07 13:38:52,214 INFO L78 Accepts]: Start accepts. Automaton has 201 states. Word has length 298 [2019-12-07 13:38:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:38:52,218 INFO L225 Difference]: With dead ends: 4665 [2019-12-07 13:38:52,218 INFO L226 Difference]: Without dead ends: 4372 [2019-12-07 13:38:52,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45047 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=23149, Invalid=165641, Unknown=0, NotChecked=0, Total=188790 [2019-12-07 13:38:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2019-12-07 13:38:52,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 4176. [2019-12-07 13:38:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4176 states. [2019-12-07 13:38:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 4276 transitions. [2019-12-07 13:38:52,669 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 4276 transitions. Word has length 298 [2019-12-07 13:38:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:38:52,669 INFO L462 AbstractCegarLoop]: Abstraction has 4176 states and 4276 transitions. [2019-12-07 13:38:52,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 201 states. [2019-12-07 13:38:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 4276 transitions. [2019-12-07 13:38:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-12-07 13:38:52,670 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:38:52,670 INFO L410 BasicCegarLoop]: trace histogram [100, 99, 52, 48, 1, 1, 1, 1, 1] [2019-12-07 13:38:52,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:38:52,871 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:38:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:38:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1210372483, now seen corresponding path program 52 times [2019-12-07 13:38:52,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:38:52,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358104728] [2019-12-07 13:38:52,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:38:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:38:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 4022 proven. 10828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:38:58,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358104728] [2019-12-07 13:38:58,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011553353] [2019-12-07 13:38:58,052 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:38:58,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:38:58,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:38:58,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 50 conjunts are in the unsatisfiable core [2019-12-07 13:38:58,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:39:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7494 proven. 3480 refuted. 0 times theorem prover too weak. 3876 trivial. 0 not checked. [2019-12-07 13:39:01,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:39:01,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 50] total 198 [2019-12-07 13:39:01,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552210816] [2019-12-07 13:39:01,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 199 states [2019-12-07 13:39:01,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:39:01,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2019-12-07 13:39:01,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7502, Invalid=31900, Unknown=0, NotChecked=0, Total=39402 [2019-12-07 13:39:01,085 INFO L87 Difference]: Start difference. First operand 4176 states and 4276 transitions. Second operand 199 states. [2019-12-07 13:39:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:39:07,936 INFO L93 Difference]: Finished difference Result 8212 states and 8413 transitions. [2019-12-07 13:39:07,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-12-07 13:39:07,937 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 304 [2019-12-07 13:39:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:39:07,942 INFO L225 Difference]: With dead ends: 8212 [2019-12-07 13:39:07,942 INFO L226 Difference]: Without dead ends: 4180 [2019-12-07 13:39:07,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19440 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=21670, Invalid=65650, Unknown=0, NotChecked=0, Total=87320 [2019-12-07 13:39:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2019-12-07 13:39:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 4179. [2019-12-07 13:39:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2019-12-07 13:39:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 4279 transitions. [2019-12-07 13:39:08,400 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 4279 transitions. Word has length 304 [2019-12-07 13:39:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:39:08,401 INFO L462 AbstractCegarLoop]: Abstraction has 4179 states and 4279 transitions. [2019-12-07 13:39:08,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 199 states. [2019-12-07 13:39:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 4279 transitions. [2019-12-07 13:39:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2019-12-07 13:39:08,402 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:39:08,402 INFO L410 BasicCegarLoop]: trace histogram [101, 100, 52, 49, 1, 1, 1, 1, 1] [2019-12-07 13:39:08,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:39:08,603 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:39:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:39:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2026798773, now seen corresponding path program 53 times [2019-12-07 13:39:08,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:39:08,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741106397] [2019-12-07 13:39:08,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:39:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:39:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 4025 proven. 11125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:39:13,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741106397] [2019-12-07 13:39:13,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989976733] [2019-12-07 13:39:13,926 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:39:14,092 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2019-12-07 13:39:14,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:39:14,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 51 conjunts are in the unsatisfiable core [2019-12-07 13:39:14,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:39:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 7648 proven. 3626 refuted. 0 times theorem prover too weak. 3876 trivial. 0 not checked. [2019-12-07 13:39:17,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:39:17,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 51] total 201 [2019-12-07 13:39:17,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673890913] [2019-12-07 13:39:17,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 202 states [2019-12-07 13:39:17,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:39:17,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2019-12-07 13:39:17,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=32850, Unknown=0, NotChecked=0, Total=40602 [2019-12-07 13:39:17,139 INFO L87 Difference]: Start difference. First operand 4179 states and 4279 transitions. Second operand 202 states. [2019-12-07 13:39:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:39:24,998 INFO L93 Difference]: Finished difference Result 8214 states and 8415 transitions. [2019-12-07 13:39:24,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-12-07 13:39:24,999 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 307 [2019-12-07 13:39:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:39:25,005 INFO L225 Difference]: With dead ends: 8214 [2019-12-07 13:39:25,005 INFO L226 Difference]: Without dead ends: 4182 [2019-12-07 13:39:25,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19895 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=22604, Invalid=67696, Unknown=0, NotChecked=0, Total=90300 [2019-12-07 13:39:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2019-12-07 13:39:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 4182. [2019-12-07 13:39:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4182 states. [2019-12-07 13:39:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4182 states to 4182 states and 4282 transitions. [2019-12-07 13:39:25,463 INFO L78 Accepts]: Start accepts. Automaton has 4182 states and 4282 transitions. Word has length 307 [2019-12-07 13:39:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:39:25,463 INFO L462 AbstractCegarLoop]: Abstraction has 4182 states and 4282 transitions. [2019-12-07 13:39:25,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 202 states. [2019-12-07 13:39:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4182 states and 4282 transitions. [2019-12-07 13:39:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-12-07 13:39:25,464 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:39:25,464 INFO L410 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1] [2019-12-07 13:39:25,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:39:25,665 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:39:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:39:25,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1782606915, now seen corresponding path program 54 times [2019-12-07 13:39:25,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:39:25,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993975072] [2019-12-07 13:39:25,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:39:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:39:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-12-07 13:39:26,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993975072] [2019-12-07 13:39:26,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104877959] [2019-12-07 13:39:26,569 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/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 [2019-12-07 13:39:26,728 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 102 check-sat command(s) [2019-12-07 13:39:26,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:39:26,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 103 conjunts are in the unsatisfiable core [2019-12-07 13:39:26,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:39:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-12-07 13:39:26,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:39:26,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2019-12-07 13:39:26,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521582551] [2019-12-07 13:39:26,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-12-07 13:39:26,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:39:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-12-07 13:39:26,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 13:39:26,832 INFO L87 Difference]: Start difference. First operand 4182 states and 4282 transitions. Second operand 54 states. [2019-12-07 13:39:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:39:27,500 INFO L93 Difference]: Finished difference Result 8368 states and 8569 transitions. [2019-12-07 13:39:27,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-12-07 13:39:27,500 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 310 [2019-12-07 13:39:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:39:27,505 INFO L225 Difference]: With dead ends: 8368 [2019-12-07 13:39:27,505 INFO L226 Difference]: Without dead ends: 4185 [2019-12-07 13:39:27,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 13:39:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2019-12-07 13:39:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 4185. [2019-12-07 13:39:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4185 states. [2019-12-07 13:39:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 4285 transitions. [2019-12-07 13:39:27,950 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 4285 transitions. Word has length 310 [2019-12-07 13:39:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:39:27,950 INFO L462 AbstractCegarLoop]: Abstraction has 4185 states and 4285 transitions. [2019-12-07 13:39:27,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-12-07 13:39:27,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 4285 transitions. [2019-12-07 13:39:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2019-12-07 13:39:27,962 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:39:27,962 INFO L410 BasicCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1, 1, 1] [2019-12-07 13:39:28,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:39:28,164 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:39:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:39:28,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1557402635, now seen corresponding path program 55 times [2019-12-07 13:39:28,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:39:28,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910047364] [2019-12-07 13:39:28,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:39:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:39:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2019-12-07 13:39:29,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910047364] [2019-12-07 13:39:29,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:39:29,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2019-12-07 13:39:29,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209583668] [2019-12-07 13:39:29,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-12-07 13:39:29,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:39:29,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-12-07 13:39:29,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-12-07 13:39:29,043 INFO L87 Difference]: Start difference. First operand 4185 states and 4285 transitions. Second operand 53 states. [2019-12-07 13:39:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:39:29,208 INFO L93 Difference]: Finished difference Result 4185 states and 4285 transitions. [2019-12-07 13:39:29,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-12-07 13:39:29,208 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 313 [2019-12-07 13:39:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:39:29,209 INFO L225 Difference]: With dead ends: 4185 [2019-12-07 13:39:29,209 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:39:29,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-12-07 13:39:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:39:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:39:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:39:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:39:29,211 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 313 [2019-12-07 13:39:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:39:29,211 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:39:29,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-12-07 13:39:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:39:29,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:39:29,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 13:39:40,917 WARN L192 SmtUtils]: Spent 11.70 s on a formula simplification. DAG size of input: 1882 DAG size of output: 1213 [2019-12-07 13:39:54,719 WARN L192 SmtUtils]: Spent 13.79 s on a formula simplification. DAG size of input: 1146 DAG size of output: 489 [2019-12-07 13:39:54,723 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 13:39:54,724 INFO L246 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2019-12-07 13:39:54,724 INFO L246 CegarLoopResult]: For program point L15-2(lines 14 22) no Hoare annotation was computed. [2019-12-07 13:39:54,724 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-12-07 13:39:54,724 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 13:39:54,724 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 13:39:54,724 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-12-07 13:39:54,724 INFO L249 CegarLoopResult]: At program point L24(lines 10 25) the Hoare annotation is: true [2019-12-07 13:39:54,726 INFO L242 CegarLoopResult]: At program point L14-2(lines 14 22) the Hoare annotation is: (let ((.cse10 (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0)) (.cse42 (<= 8 ULTIMATE.start_main_~y~0)) (.cse0 (<= 3 ULTIMATE.start_main_~y~0)) (.cse32 (<= 49 ULTIMATE.start_main_~y~0))) (let ((.cse3 (<= 14 ULTIMATE.start_main_~y~0)) (.cse12 (<= 11 ULTIMATE.start_main_~y~0)) (.cse19 (<= ULTIMATE.start_main_~y~0 48)) (.cse17 (<= 1 ULTIMATE.start_main_~y~0)) (.cse24 (<= ULTIMATE.start_main_~y~0 33)) (.cse9 (<= ULTIMATE.start_main_~y~0 45)) (.cse29 (<= ULTIMATE.start_main_~y~0 47)) (.cse27 (<= ULTIMATE.start_main_~y~0 38)) (.cse13 (<= ULTIMATE.start_main_~y~0 24)) (.cse33 (<= ULTIMATE.start_main_~y~0 49)) (.cse4 (<= ULTIMATE.start_main_~y~0 21)) (.cse5 (<= 21 ULTIMATE.start_main_~y~0)) (.cse23 (<= ULTIMATE.start_main_~y~0 9)) (.cse7 (<= 41 ULTIMATE.start_main_~y~0)) (.cse34 (<= ULTIMATE.start_main_~y~0 43)) (.cse15 (<= ULTIMATE.start_main_~y~0 23)) (.cse22 (<= ULTIMATE.start_main_~y~0 12)) (.cse37 (<= 7 ULTIMATE.start_main_~y~0)) (.cse38 (<= 5 ULTIMATE.start_main_~y~0)) (.cse6 (<= ULTIMATE.start_main_~y~0 36)) (.cse28 (<= ULTIMATE.start_main_~y~0 44)) (.cse25 (<= ULTIMATE.start_main_~y~0 30)) (.cse26 (<= ULTIMATE.start_main_~y~0 20)) (.cse41 (<= ULTIMATE.start_main_~y~0 31)) (.cse21 (<= ULTIMATE.start_main_~y~0 17)) (.cse39 (<= ULTIMATE.start_main_~y~0 16)) (.cse30 (<= ULTIMATE.start_main_~y~0 10)) (.cse1 (<= ULTIMATE.start_main_~y~0 6)) (.cse36 (<= ULTIMATE.start_main_~y~0 15)) (.cse31 (<= ULTIMATE.start_main_~y~0 19)) (.cse16 (<= 27 ULTIMATE.start_main_~y~0)) (.cse40 (<= ULTIMATE.start_main_~y~0 32)) (.cse14 (<= 40 ULTIMATE.start_main_~y~0)) (.cse20 (or (and .cse10 .cse42 .cse0) .cse32)) (.cse2 (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0)) (.cse8 (<= 0 ULTIMATE.start_main_~y~0)) (.cse11 (<= 19 ULTIMATE.start_main_~y~0)) (.cse18 (<= 42 ULTIMATE.start_main_~y~0)) (.cse43 (<= ULTIMATE.start_main_~y~0 42)) (.cse35 (<= ULTIMATE.start_main_~y~0 28))) (or (and (<= 97 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 97) (<= ULTIMATE.start_main_~y~0 3) .cse0) (and (<= 6 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 94) (<= 94 ULTIMATE.start_main_~x~0) .cse1) (and (<= 18 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 18) (<= 82 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 82)) (and (<= 14 ULTIMATE.start_main_~x~0) (<= .cse2 28) .cse3) (and .cse4 (<= ULTIMATE.start_main_~x~0 79) (<= 79 ULTIMATE.start_main_~x~0) .cse5) (and (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) (<= 36 ULTIMATE.start_main_~y~0) .cse6) (and (<= 59 ULTIMATE.start_main_~x~0) .cse7 (<= ULTIMATE.start_main_~y~0 41) (<= ULTIMATE.start_main_~x~0 59)) (and (<= .cse2 0) (<= 0 ULTIMATE.start_main_~x~0) .cse8) (and (<= 4 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 4) (<= ULTIMATE.start_main_~x~0 96) (<= 96 ULTIMATE.start_main_~x~0)) (and (<= 45 ULTIMATE.start_main_~y~0) (<= 55 ULTIMATE.start_main_~x~0) .cse9 (<= ULTIMATE.start_main_~x~0 55)) (and .cse10 (<= 25 ULTIMATE.start_main_~x~0) .cse11 (<= .cse2 50)) (and (<= 26 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 74) (<= ULTIMATE.start_main_~y~0 26) (<= 74 ULTIMATE.start_main_~x~0)) (and (<= 3 ULTIMATE.start_main_~x~0) .cse0 (<= .cse2 6)) (and (<= 11 ULTIMATE.start_main_~x~0) (<= .cse2 22) .cse12) (and .cse10 (<= 24 ULTIMATE.start_main_~x~0) .cse11 .cse13) (and (<= ULTIMATE.start_main_~y~0 40) (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0) .cse14) (and (<= ULTIMATE.start_main_~x~0 77) (<= 23 ULTIMATE.start_main_~y~0) (<= 77 ULTIMATE.start_main_~x~0) .cse15) (and (<= 86 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 14) (<= ULTIMATE.start_main_~x~0 86) .cse3) (and (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 27) (<= ULTIMATE.start_main_~x~0 73) .cse16) (and (<= 1 ULTIMATE.start_main_~x~0) .cse17 (<= .cse2 2)) (and .cse10 (<= 34 ULTIMATE.start_main_~x~0) (<= .cse2 68) .cse11) (and .cse10 (<= 48 ULTIMATE.start_main_~x~0) .cse18 .cse11 .cse19) (and (<= ULTIMATE.start_main_~y~0 11) (<= 89 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 89) .cse12) (and (<= 39 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 61) (<= ULTIMATE.start_main_~y~0 39) (<= 61 ULTIMATE.start_main_~x~0)) (and .cse20 (<= 17 ULTIMATE.start_main_~x~0) .cse21) (and (<= ULTIMATE.start_main_~x~0 88) (<= 12 ULTIMATE.start_main_~y~0) .cse22 (<= 88 ULTIMATE.start_main_~x~0)) (and .cse20 .cse23 (<= 9 ULTIMATE.start_main_~x~0)) (and (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52) .cse19 (<= 48 ULTIMATE.start_main_~y~0)) (and .cse10 (<= 39 ULTIMATE.start_main_~x~0) .cse11 (<= .cse2 78)) (and (<= 37 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 37) (<= 63 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 63)) (and (<= ULTIMATE.start_main_~x~0 67) (<= 67 ULTIMATE.start_main_~x~0) (<= 33 ULTIMATE.start_main_~y~0) .cse24) (and (<= ULTIMATE.start_main_~x~0 70) (<= 30 ULTIMATE.start_main_~y~0) .cse25 (<= 70 ULTIMATE.start_main_~x~0)) (and .cse10 (<= 26 ULTIMATE.start_main_~x~0) .cse11 (<= .cse2 52)) (and (<= 20 ULTIMATE.start_main_~y~0) .cse26 (<= ULTIMATE.start_main_~x~0 80) (<= 80 ULTIMATE.start_main_~x~0)) (and .cse10 (<= 38 ULTIMATE.start_main_~x~0) .cse11 .cse27) (and (<= ULTIMATE.start_main_~y~0 1) .cse17 (<= 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 99)) (and .cse10 (<= 33 ULTIMATE.start_main_~x~0) .cse24 .cse11) (and (<= 44 ULTIMATE.start_main_~y~0) (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) .cse28) (and .cse10 (<= 37 ULTIMATE.start_main_~x~0) .cse11 (<= .cse2 74)) (and .cse10 (<= 45 ULTIMATE.start_main_~x~0) .cse18 .cse11 .cse9) (and (<= 2 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 2) (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (<= ULTIMATE.start_main_~x~0 53) (<= 47 ULTIMATE.start_main_~y~0) (<= 53 ULTIMATE.start_main_~x~0) .cse29) (and .cse20 (<= 10 ULTIMATE.start_main_~x~0) .cse30) (and (<= 47 ULTIMATE.start_main_~x~0) .cse10 .cse18 .cse29 .cse11) (and (<= 38 ULTIMATE.start_main_~y~0) (<= 62 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 62) .cse27) (and (<= 19 ULTIMATE.start_main_~x~0) .cse10 .cse31 .cse11) (and (<= 24 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0) .cse13) (and (<= ULTIMATE.start_main_~y~0 22) (<= ULTIMATE.start_main_~x~0 78) (<= 22 ULTIMATE.start_main_~y~0) (<= 78 ULTIMATE.start_main_~x~0)) (and (<= 29 ULTIMATE.start_main_~x~0) .cse10 (<= .cse2 58) .cse11) (and (<= ULTIMATE.start_main_~x~0 51) .cse32 (<= 51 ULTIMATE.start_main_~x~0) .cse33) (and .cse10 (<= 49 ULTIMATE.start_main_~x~0) .cse18 .cse11 .cse33) (and .cse4 (<= 21 ULTIMATE.start_main_~x~0) .cse5 (<= ULTIMATE.start_main_~x~0 21)) (and .cse23 (<= 9 ULTIMATE.start_main_~y~0) (<= 91 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 91)) (and (<= ULTIMATE.start_main_~x~0 57) (<= 57 ULTIMATE.start_main_~x~0) .cse34 (<= 43 ULTIMATE.start_main_~y~0)) (and .cse7 (<= 41 ULTIMATE.start_main_~x~0) (<= .cse2 82)) (and .cse10 (<= 28 ULTIMATE.start_main_~x~0) .cse35 .cse11) (and (<= 15 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0) .cse36) (and (<= ULTIMATE.start_main_~y~0 35) (<= 35 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~x~0)) (and .cse10 (<= 50 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 50) .cse18 .cse11) (and (<= 43 ULTIMATE.start_main_~x~0) .cse10 .cse18 .cse11 .cse34) (and (<= 93 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 93) .cse37 (<= ULTIMATE.start_main_~y~0 7)) (and (<= ULTIMATE.start_main_~y~0 5) (<= ULTIMATE.start_main_~x~0 95) (<= 95 ULTIMATE.start_main_~x~0) .cse38) (and .cse10 (<= 23 ULTIMATE.start_main_~x~0) .cse15 .cse11) (and (<= 25 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 25) (<= 75 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 75)) (and .cse20 .cse39 (<= 16 ULTIMATE.start_main_~x~0)) (and .cse10 (<= 4 ULTIMATE.start_main_~x~0) .cse0 (<= .cse2 8)) (and .cse20 (<= 12 ULTIMATE.start_main_~x~0) .cse22) (and (<= 7 ULTIMATE.start_main_~x~0) (<= .cse2 14) .cse37) (and (<= 5 ULTIMATE.start_main_~x~0) (<= .cse2 10) .cse38) (and (<= 32 ULTIMATE.start_main_~x~0) .cse10 .cse40 .cse11) (and .cse10 (<= 31 ULTIMATE.start_main_~x~0) .cse41 .cse11) (and .cse10 (<= 36 ULTIMATE.start_main_~x~0) .cse11 .cse6) (and .cse10 .cse18 .cse11 .cse28 (<= 44 ULTIMATE.start_main_~x~0)) (and .cse10 (<= 30 ULTIMATE.start_main_~x~0) .cse25 .cse11) (and (<= ULTIMATE.start_main_~y~0 46) (<= 54 ULTIMATE.start_main_~x~0) (<= 46 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 54)) (and .cse10 .cse26 .cse11 (<= 20 ULTIMATE.start_main_~x~0)) (and .cse41 (<= 69 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 69) (<= 31 ULTIMATE.start_main_~y~0)) (and (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0) .cse42 (<= ULTIMATE.start_main_~y~0 8)) (and (<= ULTIMATE.start_main_~x~0 83) (<= 17 ULTIMATE.start_main_~y~0) (<= 83 ULTIMATE.start_main_~x~0) .cse21) (and .cse20 (<= 8 ULTIMATE.start_main_~x~0) (<= .cse2 16)) (and (<= 84 ULTIMATE.start_main_~x~0) (<= 16 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 84) .cse39) (and .cse10 (<= .cse2 70) .cse11 (<= 35 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 90) (<= 90 ULTIMATE.start_main_~x~0) (<= 10 ULTIMATE.start_main_~y~0) .cse30) (and (<= 6 ULTIMATE.start_main_~x~0) .cse10 .cse0 .cse1) (and (<= 18 ULTIMATE.start_main_~x~0) .cse20 (<= .cse2 36)) (and .cse20 (<= 15 ULTIMATE.start_main_~x~0) .cse36) (and .cse10 (<= 22 ULTIMATE.start_main_~x~0) .cse11 (<= .cse2 44)) (and .cse10 (<= .cse2 92) .cse18 .cse11 (<= 46 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 81) (<= 81 ULTIMATE.start_main_~x~0) .cse31 .cse11) (and (<= .cse2 54) (<= 27 ULTIMATE.start_main_~x~0) .cse16) (and (<= ULTIMATE.start_main_~x~0 68) .cse40 (<= 32 ULTIMATE.start_main_~y~0) (<= 68 ULTIMATE.start_main_~x~0)) (and (<= 40 ULTIMATE.start_main_~x~0) (<= .cse2 80) .cse14) (and (<= .cse2 26) .cse20 (<= 13 ULTIMATE.start_main_~x~0)) (and .cse10 (<= .cse2 4) (<= 2 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~y~0 0) (<= 100 ULTIMATE.start_main_~x~0) .cse8 (<= ULTIMATE.start_main_~x~0 100)) (and (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 34) (<= 34 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 66)) (and (<= 71 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 71) (<= 29 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 29)) (and .cse10 (<= 42 ULTIMATE.start_main_~x~0) .cse18 .cse11 .cse43) (and (<= ULTIMATE.start_main_~x~0 58) .cse18 (<= 58 ULTIMATE.start_main_~x~0) .cse43) (and (<= 28 ULTIMATE.start_main_~y~0) .cse35 (<= 72 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 72)) (and (<= ULTIMATE.start_main_~y~0 13) (<= 13 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 87) (<= 87 ULTIMATE.start_main_~x~0))))) [2019-12-07 13:39:54,726 INFO L246 CegarLoopResult]: For program point L14-3(lines 14 22) no Hoare annotation was computed. [2019-12-07 13:39:54,726 INFO L246 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-12-07 13:39:54,726 INFO L249 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2019-12-07 13:39:54,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:39:54 BoogieIcfgContainer [2019-12-07 13:39:54,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:39:54,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:39:54,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:39:54,769 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:39:54,769 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:34:08" (3/4) ... [2019-12-07 13:39:54,773 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:39:54,780 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 13:39:54,780 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 13:39:54,811 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_36a9d922-4a21-4d84-afba-64c796cf61d3/bin/uautomizer/witness.graphml [2019-12-07 13:39:54,811 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:39:54,812 INFO L168 Benchmark]: Toolchain (without parser) took 346170.23 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 319.3 MB). Free memory was 946.0 MB in the beginning and 574.5 MB in the end (delta: 371.6 MB). Peak memory consumption was 690.9 MB. Max. memory is 11.5 GB. [2019-12-07 13:39:54,812 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:39:54,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:39:54,812 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:39:54,813 INFO L168 Benchmark]: Boogie Preprocessor took 13.56 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:39:54,813 INFO L168 Benchmark]: RCFGBuilder took 141.50 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:39:54,813 INFO L168 Benchmark]: TraceAbstraction took 345777.46 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 223.3 MB). Free memory was 1.1 GB in the beginning and 577.9 MB in the end (delta: 494.5 MB). Peak memory consumption was 864.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:39:54,813 INFO L168 Benchmark]: Witness Printer took 42.35 ms. Allocated memory is still 1.3 GB. Free memory was 577.9 MB in the beginning and 574.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-12-07 13:39:54,815 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.09 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.56 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 141.50 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 345777.46 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 223.3 MB). Free memory was 1.1 GB in the beginning and 577.9 MB in the end (delta: 494.5 MB). Peak memory consumption was 864.3 MB. Max. memory is 11.5 GB. * Witness Printer took 42.35 ms. Allocated memory is still 1.3 GB. Free memory was 577.9 MB in the beginning and 574.5 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((97 <= x && x <= 97) && y <= 3) && 3 <= y) || (((6 <= y && x <= 94) && 94 <= x) && y <= 6)) || (((18 <= y && y <= 18) && 82 <= x) && x <= 82)) || ((14 <= x && x + y <= 28) && 14 <= y)) || (((y <= 21 && x <= 79) && 79 <= x) && 21 <= y)) || (((x <= 64 && 64 <= x) && 36 <= y) && y <= 36)) || (((59 <= x && 41 <= y) && y <= 41) && x <= 59)) || ((x + y <= 0 && 0 <= x) && 0 <= y)) || (((4 <= y && y <= 4) && x <= 96) && 96 <= x)) || (((45 <= y && 55 <= x) && y <= 45) && x <= 55)) || (((x <= y && 25 <= x) && 19 <= y) && x + y <= 50)) || (((26 <= y && x <= 74) && y <= 26) && 74 <= x)) || ((3 <= x && 3 <= y) && x + y <= 6)) || ((11 <= x && x + y <= 22) && 11 <= y)) || (((x <= y && 24 <= x) && 19 <= y) && y <= 24)) || (((y <= 40 && x <= 60) && 60 <= x) && 40 <= y)) || (((x <= 77 && 23 <= y) && 77 <= x) && y <= 23)) || (((86 <= x && y <= 14) && x <= 86) && 14 <= y)) || (((73 <= x && y <= 27) && x <= 73) && 27 <= y)) || ((1 <= x && 1 <= y) && x + y <= 2)) || (((x <= y && 34 <= x) && x + y <= 68) && 19 <= y)) || ((((x <= y && 48 <= x) && 42 <= y) && 19 <= y) && y <= 48)) || (((y <= 11 && 89 <= x) && x <= 89) && 11 <= y)) || (((39 <= y && x <= 61) && y <= 39) && 61 <= x)) || (((((x <= y && 8 <= y) && 3 <= y) || 49 <= y) && 17 <= x) && y <= 17)) || (((x <= 88 && 12 <= y) && y <= 12) && 88 <= x)) || (((((x <= y && 8 <= y) && 3 <= y) || 49 <= y) && y <= 9) && 9 <= x)) || (((52 <= x && x <= 52) && y <= 48) && 48 <= y)) || (((x <= y && 39 <= x) && 19 <= y) && x + y <= 78)) || (((37 <= y && y <= 37) && 63 <= x) && x <= 63)) || (((x <= 67 && 67 <= x) && 33 <= y) && y <= 33)) || (((x <= 70 && 30 <= y) && y <= 30) && 70 <= x)) || (((x <= y && 26 <= x) && 19 <= y) && x + y <= 52)) || (((20 <= y && y <= 20) && x <= 80) && 80 <= x)) || (((x <= y && 38 <= x) && 19 <= y) && y <= 38)) || (((y <= 1 && 1 <= y) && 99 <= x) && x <= 99)) || (((x <= y && 33 <= x) && y <= 33) && 19 <= y)) || (((44 <= y && 56 <= x) && x <= 56) && y <= 44)) || (((x <= y && 37 <= x) && 19 <= y) && x + y <= 74)) || ((((x <= y && 45 <= x) && 42 <= y) && 19 <= y) && y <= 45)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || (((x <= 53 && 47 <= y) && 53 <= x) && y <= 47)) || (((((x <= y && 8 <= y) && 3 <= y) || 49 <= y) && 10 <= x) && y <= 10)) || ((((47 <= x && x <= y) && 42 <= y) && y <= 47) && 19 <= y)) || (((38 <= y && 62 <= x) && x <= 62) && y <= 38)) || (((19 <= x && x <= y) && y <= 19) && 19 <= y)) || (((24 <= y && x <= 76) && 76 <= x) && y <= 24)) || (((y <= 22 && x <= 78) && 22 <= y) && 78 <= x)) || (((29 <= x && x <= y) && x + y <= 58) && 19 <= y)) || (((x <= 51 && 49 <= y) && 51 <= x) && y <= 49)) || ((((x <= y && 49 <= x) && 42 <= y) && 19 <= y) && y <= 49)) || (((y <= 21 && 21 <= x) && 21 <= y) && x <= 21)) || (((y <= 9 && 9 <= y) && 91 <= x) && x <= 91)) || (((x <= 57 && 57 <= x) && y <= 43) && 43 <= y)) || ((41 <= y && 41 <= x) && x + y <= 82)) || (((x <= y && 28 <= x) && y <= 28) && 19 <= y)) || (((15 <= y && x <= 85) && 85 <= x) && y <= 15)) || (((y <= 35 && 35 <= y) && x <= 65) && 65 <= x)) || ((((x <= y && 50 <= x) && y <= 50) && 42 <= y) && 19 <= y)) || ((((43 <= x && x <= y) && 42 <= y) && 19 <= y) && y <= 43)) || (((93 <= x && x <= 93) && 7 <= y) && y <= 7)) || (((y <= 5 && x <= 95) && 95 <= x) && 5 <= y)) || (((x <= y && 23 <= x) && y <= 23) && 19 <= y)) || (((25 <= y && y <= 25) && 75 <= x) && x <= 75)) || (((((x <= y && 8 <= y) && 3 <= y) || 49 <= y) && y <= 16) && 16 <= x)) || (((x <= y && 4 <= x) && 3 <= y) && x + y <= 8)) || (((((x <= y && 8 <= y) && 3 <= y) || 49 <= y) && 12 <= x) && y <= 12)) || ((7 <= x && x + y <= 14) && 7 <= y)) || ((5 <= x && x + y <= 10) && 5 <= y)) || (((32 <= x && x <= y) && y <= 32) && 19 <= y)) || (((x <= y && 31 <= x) && y <= 31) && 19 <= y)) || (((x <= y && 36 <= x) && 19 <= y) && y <= 36)) || ((((x <= y && 42 <= y) && 19 <= y) && y <= 44) && 44 <= x)) || (((x <= y && 30 <= x) && y <= 30) && 19 <= y)) || (((y <= 46 && 54 <= x) && 46 <= y) && x <= 54)) || (((x <= y && y <= 20) && 19 <= y) && 20 <= x)) || (((y <= 31 && 69 <= x) && x <= 69) && 31 <= y)) || (((x <= 92 && 92 <= x) && 8 <= y) && y <= 8)) || (((x <= 83 && 17 <= y) && 83 <= x) && y <= 17)) || (((((x <= y && 8 <= y) && 3 <= y) || 49 <= y) && 8 <= x) && x + y <= 16)) || (((84 <= x && 16 <= y) && x <= 84) && y <= 16)) || (((x <= y && x + y <= 70) && 19 <= y) && 35 <= x)) || (((x <= 90 && 90 <= x) && 10 <= y) && y <= 10)) || (((6 <= x && x <= y) && 3 <= y) && y <= 6)) || ((18 <= x && (((x <= y && 8 <= y) && 3 <= y) || 49 <= y)) && x + y <= 36)) || (((((x <= y && 8 <= y) && 3 <= y) || 49 <= y) && 15 <= x) && y <= 15)) || (((x <= y && 22 <= x) && 19 <= y) && x + y <= 44)) || ((((x <= y && x + y <= 92) && 42 <= y) && 19 <= y) && 46 <= x)) || (((x <= 81 && 81 <= x) && y <= 19) && 19 <= y)) || ((x + y <= 54 && 27 <= x) && 27 <= y)) || (((x <= 68 && y <= 32) && 32 <= y) && 68 <= x)) || ((40 <= x && x + y <= 80) && 40 <= y)) || ((x + y <= 26 && (((x <= y && 8 <= y) && 3 <= y) || 49 <= y)) && 13 <= x)) || ((x <= y && x + y <= 4) && 2 <= x)) || (((y <= 0 && 100 <= x) && 0 <= y) && x <= 100)) || (((66 <= x && y <= 34) && 34 <= y) && x <= 66)) || (((71 <= x && x <= 71) && 29 <= y) && y <= 29)) || ((((x <= y && 42 <= x) && 42 <= y) && 19 <= y) && y <= 42)) || (((x <= 58 && 42 <= y) && 58 <= x) && y <= 42)) || (((28 <= y && y <= 28) && 72 <= x) && x <= 72)) || (((y <= 13 && 13 <= y) && x <= 87) && 87 <= x) - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Result: SAFE, OverallTime: 320.1s, OverallIterations: 58, TraceHistogramMax: 103, AutomataDifference: 156.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.5s, HoareTripleCheckerStatistics: 761 SDtfs, 3169 SDslu, 32263 SDs, 0 SdLazy, 54091 SolverSat, 9323 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16503 GetRequests, 8490 SyntacticMatches, 0 SemanticMatches, 8013 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409512 ImplicationChecksByTransitivity, 249.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4185occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 58 MinimizatonAttempts, 19604 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 150 NumberOfFragments, 1430 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1461420 FormulaSimplificationTreeSizeReduction, 11.7s HoareSimplificationTime, 3 FomulaSimplificationsInter, 59109 FormulaSimplificationTreeSizeReductionInter, 13.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 142.3s InterpolantComputationTime, 19028 NumberOfCodeBlocks, 18950 NumberOfCodeBlocksAsserted, 1655 NumberOfCheckSat, 18916 ConstructedInterpolants, 0 QuantifiedInterpolants, 12997228 SizeOfPredicates, 56 NumberOfNonLiveVariables, 21720 ConjunctsInSsa, 1772 ConjunctsInUnsatCore, 112 InterpolantComputations, 4 PerfectInterpolantSequences, 369946/665343 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...