./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a9963030a13e3c679db84f21688cc66372a5ac3 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 02:51:39,120 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 02:51:39,121 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 02:51:39,129 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 02:51:39,130 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 02:51:39,130 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 02:51:39,131 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 02:51:39,132 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 02:51:39,134 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 02:51:39,134 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 02:51:39,135 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 02:51:39,135 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 02:51:39,136 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 02:51:39,137 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 02:51:39,137 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 02:51:39,138 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 02:51:39,138 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 02:51:39,140 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 02:51:39,141 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 02:51:39,142 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 02:51:39,143 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 02:51:39,143 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 02:51:39,145 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 02:51:39,145 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 02:51:39,145 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 02:51:39,146 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 02:51:39,146 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 02:51:39,147 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 02:51:39,148 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 02:51:39,148 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 02:51:39,148 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 02:51:39,149 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 02:51:39,149 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 02:51:39,149 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 02:51:39,150 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 02:51:39,150 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 02:51:39,150 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 02:51:39,160 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 02:51:39,160 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 02:51:39,161 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 02:51:39,161 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 02:51:39,161 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 02:51:39,162 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 02:51:39,162 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 02:51:39,162 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 02:51:39,162 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 02:51:39,162 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 02:51:39,162 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 02:51:39,163 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 02:51:39,163 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 02:51:39,163 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 02:51:39,163 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 02:51:39,163 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 02:51:39,163 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 02:51:39,163 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 02:51:39,164 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 02:51:39,164 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 02:51:39,164 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 02:51:39,164 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 02:51:39,164 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 02:51:39,164 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 02:51:39,164 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 02:51:39,165 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 02:51:39,165 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 02:51:39,165 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 02:51:39,165 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 02:51:39,165 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 02:51:39,165 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a9963030a13e3c679db84f21688cc66372a5ac3 [2018-11-23 02:51:39,187 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 02:51:39,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 02:51:39,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 02:51:39,197 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 02:51:39,198 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 02:51:39,198 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-11-23 02:51:39,235 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/data/4350c9cbc/acbf8904d6e840a9a2c6e8bae244c95b/FLAGff951cdb4 [2018-11-23 02:51:39,562 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 02:51:39,562 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-11-23 02:51:39,567 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/data/4350c9cbc/acbf8904d6e840a9a2c6e8bae244c95b/FLAGff951cdb4 [2018-11-23 02:51:40,010 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/data/4350c9cbc/acbf8904d6e840a9a2c6e8bae244c95b [2018-11-23 02:51:40,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 02:51:40,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 02:51:40,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 02:51:40,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 02:51:40,019 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 02:51:40,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f711c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40, skipping insertion in model container [2018-11-23 02:51:40,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 02:51:40,041 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 02:51:40,139 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:51:40,141 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 02:51:40,149 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:51:40,158 INFO L195 MainTranslator]: Completed translation [2018-11-23 02:51:40,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40 WrapperNode [2018-11-23 02:51:40,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 02:51:40,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 02:51:40,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 02:51:40,159 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 02:51:40,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 02:51:40,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 02:51:40,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 02:51:40,171 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 02:51:40,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... [2018-11-23 02:51:40,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 02:51:40,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 02:51:40,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 02:51:40,183 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 02:51:40,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 02:51:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 02:51:40,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 02:51:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 02:51:40,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 02:51:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 02:51:40,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 02:51:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 02:51:40,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 02:51:40,364 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 02:51:40,364 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-23 02:51:40,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:40 BoogieIcfgContainer [2018-11-23 02:51:40,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 02:51:40,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 02:51:40,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 02:51:40,367 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 02:51:40,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:51:40" (1/3) ... [2018-11-23 02:51:40,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e96b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:40, skipping insertion in model container [2018-11-23 02:51:40,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40" (2/3) ... [2018-11-23 02:51:40,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e96b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:40, skipping insertion in model container [2018-11-23 02:51:40,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:40" (3/3) ... [2018-11-23 02:51:40,369 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call_true-termination.c.i [2018-11-23 02:51:40,375 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 02:51:40,380 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 02:51:40,389 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 02:51:40,408 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 02:51:40,409 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 02:51:40,409 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 02:51:40,409 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 02:51:40,409 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 02:51:40,409 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 02:51:40,409 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 02:51:40,409 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 02:51:40,409 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 02:51:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-23 02:51:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 02:51:40,426 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:40,427 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:40,429 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:40,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2018-11-23 02:51:40,435 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:40,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:40,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:51:40,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-23 02:51:40,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-23 02:51:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-23 02:51:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-23 02:51:40,512 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-23 02:51:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:40,525 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-23 02:51:40,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-23 02:51:40,526 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-23 02:51:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:40,531 INFO L225 Difference]: With dead ends: 31 [2018-11-23 02:51:40,531 INFO L226 Difference]: Without dead ends: 12 [2018-11-23 02:51:40,533 INFO L631 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 [2018-11-23 02:51:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-23 02:51:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-23 02:51:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-23 02:51:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-11-23 02:51:40,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-11-23 02:51:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:40,556 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-11-23 02:51:40,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-23 02:51:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-11-23 02:51:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 02:51:40,557 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:40,557 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:40,557 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:40,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:40,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2018-11-23 02:51:40,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:40,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:40,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,590 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:51:40,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 02:51:40,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-23 02:51:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 02:51:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 02:51:40,592 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2018-11-23 02:51:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:40,609 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2018-11-23 02:51:40,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 02:51:40,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-23 02:51:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:40,610 INFO L225 Difference]: With dead ends: 21 [2018-11-23 02:51:40,611 INFO L226 Difference]: Without dead ends: 14 [2018-11-23 02:51:40,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 02:51:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-23 02:51:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-23 02:51:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-23 02:51:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-23 02:51:40,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-23 02:51:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:40,615 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-23 02:51:40,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-23 02:51:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-23 02:51:40,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-23 02:51:40,615 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:40,615 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:40,616 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:40,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2018-11-23 02:51:40,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:40,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:40,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:40,634 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:40,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:40,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 02:51:40,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-11-23 02:51:40,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:51:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:51:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:51:40,702 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-11-23 02:51:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:40,719 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-23 02:51:40,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 02:51:40,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-11-23 02:51:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:40,719 INFO L225 Difference]: With dead ends: 25 [2018-11-23 02:51:40,719 INFO L226 Difference]: Without dead ends: 18 [2018-11-23 02:51:40,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:51:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-23 02:51:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-11-23 02:51:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-23 02:51:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-23 02:51:40,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-11-23 02:51:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:40,723 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-23 02:51:40,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:51:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-23 02:51:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-23 02:51:40,724 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:40,724 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:40,724 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:40,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:40,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1891741908, now seen corresponding path program 1 times [2018-11-23 02:51:40,724 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:40,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:40,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:40,775 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:40,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:40,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:40,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-23 02:51:40,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:51:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:51:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:51:40,809 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2018-11-23 02:51:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:40,833 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-11-23 02:51:40,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 02:51:40,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-11-23 02:51:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:40,834 INFO L225 Difference]: With dead ends: 27 [2018-11-23 02:51:40,834 INFO L226 Difference]: Without dead ends: 19 [2018-11-23 02:51:40,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:51:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-23 02:51:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-23 02:51:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 02:51:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-11-23 02:51:40,838 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-11-23 02:51:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:40,838 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-11-23 02:51:40,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:51:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-11-23 02:51:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-23 02:51:40,839 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:40,839 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:40,839 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:40,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash 719576937, now seen corresponding path program 2 times [2018-11-23 02:51:40,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:40,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:40,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:40,893 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:40,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:40,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:40,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:40,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:40,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:40,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 02:51:40,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 02:51:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 02:51:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:51:40,931 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-11-23 02:51:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:40,949 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-11-23 02:51:40,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:51:40,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-11-23 02:51:40,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:40,950 INFO L225 Difference]: With dead ends: 29 [2018-11-23 02:51:40,950 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 02:51:40,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:51:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 02:51:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-23 02:51:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 02:51:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-23 02:51:40,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-11-23 02:51:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:40,953 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-23 02:51:40,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 02:51:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-23 02:51:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-23 02:51:40,953 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:40,954 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:40,954 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:40,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1936086118, now seen corresponding path program 3 times [2018-11-23 02:51:40,954 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:40,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:40,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:40,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:41,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:41,010 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:41,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:41,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-23 02:51:41,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:41,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-23 02:51:41,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:41,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2018-11-23 02:51:41,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 02:51:41,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 02:51:41,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-23 02:51:41,094 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2018-11-23 02:51:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:41,125 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-11-23 02:51:41,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 02:51:41,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-11-23 02:51:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:41,127 INFO L225 Difference]: With dead ends: 34 [2018-11-23 02:51:41,127 INFO L226 Difference]: Without dead ends: 26 [2018-11-23 02:51:41,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-23 02:51:41,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-23 02:51:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-23 02:51:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-23 02:51:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-11-23 02:51:41,131 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-11-23 02:51:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:41,131 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-11-23 02:51:41,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 02:51:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-11-23 02:51:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-23 02:51:41,131 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:41,132 INFO L402 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:41,132 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:41,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash 485983838, now seen corresponding path program 4 times [2018-11-23 02:51:41,132 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:41,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:41,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:41,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 02:51:41,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:41,175 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:41,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:41,188 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:41,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:41,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 02:51:41,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:41,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 02:51:41,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 02:51:41,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 02:51:41,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-23 02:51:41,214 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2018-11-23 02:51:41,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:41,237 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2018-11-23 02:51:41,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 02:51:41,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2018-11-23 02:51:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:41,238 INFO L225 Difference]: With dead ends: 37 [2018-11-23 02:51:41,238 INFO L226 Difference]: Without dead ends: 27 [2018-11-23 02:51:41,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-23 02:51:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-23 02:51:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-23 02:51:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-23 02:51:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-23 02:51:41,241 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-11-23 02:51:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:41,241 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-23 02:51:41,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 02:51:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-23 02:51:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 02:51:41,241 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:41,241 INFO L402 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:41,242 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:41,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 375097755, now seen corresponding path program 5 times [2018-11-23 02:51:41,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:41,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:41,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:41,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 02:51:41,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:41,298 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:41,309 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:41,329 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-23 02:51:41,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:41,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 02:51:41,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:41,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 02:51:41,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 02:51:41,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 02:51:41,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-23 02:51:41,351 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2018-11-23 02:51:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:41,380 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-11-23 02:51:41,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 02:51:41,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-23 02:51:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:41,381 INFO L225 Difference]: With dead ends: 39 [2018-11-23 02:51:41,382 INFO L226 Difference]: Without dead ends: 29 [2018-11-23 02:51:41,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-23 02:51:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-23 02:51:41,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-23 02:51:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-23 02:51:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-11-23 02:51:41,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-11-23 02:51:41,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:41,386 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-11-23 02:51:41,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 02:51:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-11-23 02:51:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-23 02:51:41,386 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:41,386 INFO L402 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:41,387 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:41,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:41,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1187754392, now seen corresponding path program 6 times [2018-11-23 02:51:41,387 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:41,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:41,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:41,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 02:51:41,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:41,451 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:41,459 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:41,474 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-23 02:51:41,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:41,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:41,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:41,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-11-23 02:51:41,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 02:51:41,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 02:51:41,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-23 02:51:41,591 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 19 states. [2018-11-23 02:51:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:41,653 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2018-11-23 02:51:41,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 02:51:41,654 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2018-11-23 02:51:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:41,654 INFO L225 Difference]: With dead ends: 56 [2018-11-23 02:51:41,654 INFO L226 Difference]: Without dead ends: 46 [2018-11-23 02:51:41,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-23 02:51:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-23 02:51:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-11-23 02:51:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-23 02:51:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2018-11-23 02:51:41,660 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 28 [2018-11-23 02:51:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:41,660 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2018-11-23 02:51:41,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 02:51:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2018-11-23 02:51:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-23 02:51:41,661 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:41,661 INFO L402 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:41,661 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:41,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1069809998, now seen corresponding path program 7 times [2018-11-23 02:51:41,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:41,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:41,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:41,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-23 02:51:41,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:41,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:41,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-23 02:51:41,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:41,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-23 02:51:41,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 02:51:41,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 02:51:41,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-23 02:51:41,809 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 11 states. [2018-11-23 02:51:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:41,845 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2018-11-23 02:51:41,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 02:51:41,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2018-11-23 02:51:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:41,846 INFO L225 Difference]: With dead ends: 71 [2018-11-23 02:51:41,846 INFO L226 Difference]: Without dead ends: 47 [2018-11-23 02:51:41,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-23 02:51:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-23 02:51:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-23 02:51:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-23 02:51:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2018-11-23 02:51:41,852 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 44 [2018-11-23 02:51:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:41,852 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2018-11-23 02:51:41,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 02:51:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2018-11-23 02:51:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-23 02:51:41,853 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:41,854 INFO L402 BasicCegarLoop]: trace histogram [18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:41,854 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:41,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash -353173137, now seen corresponding path program 8 times [2018-11-23 02:51:41,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:41,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:41,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:41,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 170 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-23 02:51:41,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:41,933 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:41,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:41,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:41,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:41,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 170 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-23 02:51:41,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:41,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-23 02:51:41,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 02:51:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 02:51:41,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-23 02:51:41,979 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2018-11-23 02:51:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:42,001 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2018-11-23 02:51:42,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 02:51:42,002 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2018-11-23 02:51:42,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:42,002 INFO L225 Difference]: With dead ends: 73 [2018-11-23 02:51:42,002 INFO L226 Difference]: Without dead ends: 49 [2018-11-23 02:51:42,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-23 02:51:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-23 02:51:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-23 02:51:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-23 02:51:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-11-23 02:51:42,006 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 46 [2018-11-23 02:51:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:42,006 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-11-23 02:51:42,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 02:51:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-11-23 02:51:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-23 02:51:42,007 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:42,007 INFO L402 BasicCegarLoop]: trace histogram [19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:42,007 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:42,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:42,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1140082924, now seen corresponding path program 9 times [2018-11-23 02:51:42,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:42,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:42,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:42,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 187 proven. 110 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-11-23 02:51:42,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:42,086 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:42,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:42,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-11-23 02:51:42,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:42,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 37 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:42,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:42,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2018-11-23 02:51:42,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-23 02:51:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-23 02:51:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-23 02:51:42,349 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 32 states. [2018-11-23 02:51:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:42,428 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2018-11-23 02:51:42,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-23 02:51:42,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 48 [2018-11-23 02:51:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:42,429 INFO L225 Difference]: With dead ends: 96 [2018-11-23 02:51:42,429 INFO L226 Difference]: Without dead ends: 72 [2018-11-23 02:51:42,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-23 02:51:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-23 02:51:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-11-23 02:51:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-23 02:51:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2018-11-23 02:51:42,434 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 48 [2018-11-23 02:51:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:42,434 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2018-11-23 02:51:42,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-23 02:51:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2018-11-23 02:51:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-23 02:51:42,435 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:42,435 INFO L402 BasicCegarLoop]: trace histogram [30, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:42,436 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:42,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2089968457, now seen corresponding path program 10 times [2018-11-23 02:51:42,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:42,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:42,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:42,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 444 proven. 132 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-11-23 02:51:42,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:42,543 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:42,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:42,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:42,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:42,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 444 proven. 132 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-11-23 02:51:42,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:42,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-23 02:51:42,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 02:51:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 02:51:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-23 02:51:42,603 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 14 states. [2018-11-23 02:51:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:42,629 INFO L93 Difference]: Finished difference Result 117 states and 156 transitions. [2018-11-23 02:51:42,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 02:51:42,629 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2018-11-23 02:51:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:42,630 INFO L225 Difference]: With dead ends: 117 [2018-11-23 02:51:42,630 INFO L226 Difference]: Without dead ends: 73 [2018-11-23 02:51:42,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-23 02:51:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-23 02:51:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-11-23 02:51:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-23 02:51:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2018-11-23 02:51:42,635 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 70 [2018-11-23 02:51:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:42,635 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2018-11-23 02:51:42,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 02:51:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2018-11-23 02:51:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-23 02:51:42,636 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:42,636 INFO L402 BasicCegarLoop]: trace histogram [31, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:42,637 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:42,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 442465588, now seen corresponding path program 11 times [2018-11-23 02:51:42,637 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:42,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:42,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:42,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 481 proven. 156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-11-23 02:51:42,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:42,742 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:42,748 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:42,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-11-23 02:51:42,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:42,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 481 proven. 156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-11-23 02:51:42,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:42,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-23 02:51:42,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 02:51:42,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 02:51:42,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-23 02:51:42,800 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 15 states. [2018-11-23 02:51:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:42,829 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2018-11-23 02:51:42,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 02:51:42,829 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2018-11-23 02:51:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:42,830 INFO L225 Difference]: With dead ends: 119 [2018-11-23 02:51:42,830 INFO L226 Difference]: Without dead ends: 75 [2018-11-23 02:51:42,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-23 02:51:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-23 02:51:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-23 02:51:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-23 02:51:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2018-11-23 02:51:42,834 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 72 [2018-11-23 02:51:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:42,835 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2018-11-23 02:51:42,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 02:51:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2018-11-23 02:51:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-23 02:51:42,835 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:42,836 INFO L402 BasicCegarLoop]: trace histogram [32, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:42,836 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:42,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1134873999, now seen corresponding path program 12 times [2018-11-23 02:51:42,836 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:42,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:42,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:42,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 518 proven. 182 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-11-23 02:51:42,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:42,952 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:42,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:42,983 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-11-23 02:51:42,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:42,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 507 proven. 361 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-11-23 02:51:43,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:43,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2018-11-23 02:51:43,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 02:51:43,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 02:51:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 02:51:43,244 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 36 states. [2018-11-23 02:51:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:43,385 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2018-11-23 02:51:43,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-23 02:51:43,386 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2018-11-23 02:51:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:43,387 INFO L225 Difference]: With dead ends: 124 [2018-11-23 02:51:43,387 INFO L226 Difference]: Without dead ends: 80 [2018-11-23 02:51:43,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 02:51:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-23 02:51:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-11-23 02:51:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-23 02:51:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2018-11-23 02:51:43,393 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 74 [2018-11-23 02:51:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:43,393 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2018-11-23 02:51:43,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 02:51:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2018-11-23 02:51:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-23 02:51:43,394 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:43,394 INFO L402 BasicCegarLoop]: trace histogram [34, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:43,394 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:43,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2056007145, now seen corresponding path program 13 times [2018-11-23 02:51:43,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:43,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:43,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:43,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:43,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 585 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:43,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:43,509 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:43,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:43,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 585 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:43,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:43,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-23 02:51:43,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 02:51:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 02:51:43,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-23 02:51:43,553 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 17 states. [2018-11-23 02:51:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:43,589 INFO L93 Difference]: Finished difference Result 127 states and 168 transitions. [2018-11-23 02:51:43,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 02:51:43,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2018-11-23 02:51:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:43,591 INFO L225 Difference]: With dead ends: 127 [2018-11-23 02:51:43,591 INFO L226 Difference]: Without dead ends: 81 [2018-11-23 02:51:43,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-23 02:51:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-23 02:51:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-23 02:51:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-23 02:51:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2018-11-23 02:51:43,597 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 78 [2018-11-23 02:51:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:43,597 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2018-11-23 02:51:43,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 02:51:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2018-11-23 02:51:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-23 02:51:43,598 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:43,598 INFO L402 BasicCegarLoop]: trace histogram [35, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:43,598 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:43,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash -687324826, now seen corresponding path program 14 times [2018-11-23 02:51:43,598 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:43,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:43,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:43,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:43,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 624 proven. 240 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:43,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:43,702 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:43,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:43,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:43,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:43,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 624 proven. 240 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:43,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:43,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-23 02:51:43,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 02:51:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 02:51:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-23 02:51:43,764 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 18 states. [2018-11-23 02:51:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:43,799 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2018-11-23 02:51:43,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 02:51:43,799 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2018-11-23 02:51:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:43,800 INFO L225 Difference]: With dead ends: 129 [2018-11-23 02:51:43,800 INFO L226 Difference]: Without dead ends: 83 [2018-11-23 02:51:43,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-23 02:51:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-23 02:51:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-11-23 02:51:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-23 02:51:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2018-11-23 02:51:43,804 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 80 [2018-11-23 02:51:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:43,804 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2018-11-23 02:51:43,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 02:51:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2018-11-23 02:51:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-23 02:51:43,805 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:43,805 INFO L402 BasicCegarLoop]: trace histogram [36, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:43,805 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:43,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:43,805 INFO L82 PathProgramCache]: Analyzing trace with hash 80570787, now seen corresponding path program 15 times [2018-11-23 02:51:43,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:43,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:43,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:43,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:43,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 663 proven. 272 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:43,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:43,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:43,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:43,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-11-23 02:51:43,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:43,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 663 proven. 272 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:43,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:43,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-23 02:51:43,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 02:51:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 02:51:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-23 02:51:43,987 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 19 states. [2018-11-23 02:51:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:44,037 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2018-11-23 02:51:44,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 02:51:44,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2018-11-23 02:51:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:44,039 INFO L225 Difference]: With dead ends: 131 [2018-11-23 02:51:44,039 INFO L226 Difference]: Without dead ends: 85 [2018-11-23 02:51:44,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-23 02:51:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-23 02:51:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-11-23 02:51:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-23 02:51:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2018-11-23 02:51:44,043 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 82 [2018-11-23 02:51:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:44,044 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2018-11-23 02:51:44,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 02:51:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2018-11-23 02:51:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-23 02:51:44,044 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:44,044 INFO L402 BasicCegarLoop]: trace histogram [37, 20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:44,044 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:44,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:44,049 INFO L82 PathProgramCache]: Analyzing trace with hash -706120032, now seen corresponding path program 16 times [2018-11-23 02:51:44,049 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:44,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:44,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:44,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 702 proven. 306 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:44,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:44,194 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:44,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:44,212 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:44,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:44,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 702 proven. 306 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:44,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:44,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-23 02:51:44,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 02:51:44,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 02:51:44,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-23 02:51:44,240 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand 20 states. [2018-11-23 02:51:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:44,282 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2018-11-23 02:51:44,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-23 02:51:44,282 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2018-11-23 02:51:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:44,283 INFO L225 Difference]: With dead ends: 133 [2018-11-23 02:51:44,283 INFO L226 Difference]: Without dead ends: 87 [2018-11-23 02:51:44,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-23 02:51:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-23 02:51:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-23 02:51:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-23 02:51:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2018-11-23 02:51:44,287 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 84 [2018-11-23 02:51:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:44,287 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2018-11-23 02:51:44,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 02:51:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2018-11-23 02:51:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-23 02:51:44,288 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:44,288 INFO L402 BasicCegarLoop]: trace histogram [38, 20, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:44,288 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:44,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash -801752995, now seen corresponding path program 17 times [2018-11-23 02:51:44,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:44,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:44,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:44,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 342 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:44,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:44,436 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:44,443 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:44,476 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2018-11-23 02:51:44,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:44,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 342 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:44,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:44,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-23 02:51:44,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 02:51:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 02:51:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-23 02:51:44,504 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 21 states. [2018-11-23 02:51:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:44,582 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2018-11-23 02:51:44,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-23 02:51:44,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 86 [2018-11-23 02:51:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:44,583 INFO L225 Difference]: With dead ends: 135 [2018-11-23 02:51:44,583 INFO L226 Difference]: Without dead ends: 89 [2018-11-23 02:51:44,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-23 02:51:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-23 02:51:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-11-23 02:51:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-23 02:51:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2018-11-23 02:51:44,587 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 86 [2018-11-23 02:51:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:44,587 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2018-11-23 02:51:44,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 02:51:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2018-11-23 02:51:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-11-23 02:51:44,588 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:44,588 INFO L402 BasicCegarLoop]: trace histogram [39, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:44,589 INFO L423 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:44,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1784250074, now seen corresponding path program 18 times [2018-11-23 02:51:44,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:44,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:44,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:44,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 380 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-23 02:51:44,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:44,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:44,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:44,828 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-11-23 02:51:44,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:44,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 779 proven. 400 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-11-23 02:51:45,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:45,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2018-11-23 02:51:45,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-23 02:51:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-23 02:51:45,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-23 02:51:45,177 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand 43 states. [2018-11-23 02:51:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:45,306 INFO L93 Difference]: Finished difference Result 140 states and 184 transitions. [2018-11-23 02:51:45,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-23 02:51:45,307 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 88 [2018-11-23 02:51:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:45,308 INFO L225 Difference]: With dead ends: 140 [2018-11-23 02:51:45,308 INFO L226 Difference]: Without dead ends: 94 [2018-11-23 02:51:45,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-23 02:51:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-11-23 02:51:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2018-11-23 02:51:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 02:51:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2018-11-23 02:51:45,311 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 88 [2018-11-23 02:51:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:45,311 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2018-11-23 02:51:45,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-23 02:51:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2018-11-23 02:51:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-23 02:51:45,312 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:45,312 INFO L402 BasicCegarLoop]: trace histogram [41, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:45,312 INFO L423 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:45,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash 765850962, now seen corresponding path program 19 times [2018-11-23 02:51:45,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:45,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:45,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:45,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:45,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 420 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 02:51:45,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:45,502 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:45,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:45,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 420 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 02:51:45,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:45,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-23 02:51:45,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 02:51:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 02:51:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-23 02:51:45,564 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 23 states. [2018-11-23 02:51:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:45,608 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2018-11-23 02:51:45,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 02:51:45,609 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-11-23 02:51:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:45,610 INFO L225 Difference]: With dead ends: 143 [2018-11-23 02:51:45,610 INFO L226 Difference]: Without dead ends: 95 [2018-11-23 02:51:45,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-23 02:51:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-23 02:51:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-11-23 02:51:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-11-23 02:51:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2018-11-23 02:51:45,612 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 92 [2018-11-23 02:51:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:45,613 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2018-11-23 02:51:45,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 02:51:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2018-11-23 02:51:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-11-23 02:51:45,613 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:45,614 INFO L402 BasicCegarLoop]: trace histogram [42, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:45,614 INFO L423 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:45,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 707242511, now seen corresponding path program 20 times [2018-11-23 02:51:45,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:45,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:45,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:45,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:45,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 902 proven. 462 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 02:51:45,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:45,755 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:45,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:45,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:45,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:45,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 902 proven. 462 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 02:51:45,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:45,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-23 02:51:45,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-23 02:51:45,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 02:51:45,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-23 02:51:45,824 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 24 states. [2018-11-23 02:51:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:45,861 INFO L93 Difference]: Finished difference Result 145 states and 188 transitions. [2018-11-23 02:51:45,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-23 02:51:45,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2018-11-23 02:51:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:45,863 INFO L225 Difference]: With dead ends: 145 [2018-11-23 02:51:45,863 INFO L226 Difference]: Without dead ends: 97 [2018-11-23 02:51:45,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-23 02:51:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-23 02:51:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-11-23 02:51:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-23 02:51:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2018-11-23 02:51:45,866 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 94 [2018-11-23 02:51:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:45,866 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2018-11-23 02:51:45,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-23 02:51:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2018-11-23 02:51:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-23 02:51:45,866 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:45,867 INFO L402 BasicCegarLoop]: trace histogram [43, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:45,867 INFO L423 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:45,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:45,867 INFO L82 PathProgramCache]: Analyzing trace with hash 219095948, now seen corresponding path program 21 times [2018-11-23 02:51:45,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:45,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:45,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:45,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:45,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 943 proven. 506 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 02:51:46,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:46,083 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:46,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:46,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-11-23 02:51:46,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:46,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 85 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:51:46,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:46,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2018-11-23 02:51:46,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-23 02:51:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-23 02:51:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-11-23 02:51:46,998 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 68 states. [2018-11-23 02:51:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:47,214 INFO L93 Difference]: Finished difference Result 192 states and 280 transitions. [2018-11-23 02:51:47,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-23 02:51:47,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 96 [2018-11-23 02:51:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:47,215 INFO L225 Difference]: With dead ends: 192 [2018-11-23 02:51:47,215 INFO L226 Difference]: Without dead ends: 144 [2018-11-23 02:51:47,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-11-23 02:51:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-23 02:51:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-11-23 02:51:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-11-23 02:51:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2018-11-23 02:51:47,219 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 96 [2018-11-23 02:51:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:47,219 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2018-11-23 02:51:47,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-23 02:51:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2018-11-23 02:51:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-23 02:51:47,220 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:47,220 INFO L402 BasicCegarLoop]: trace histogram [66, 43, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:47,220 INFO L423 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:47,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:47,221 INFO L82 PathProgramCache]: Analyzing trace with hash -906433893, now seen corresponding path program 22 times [2018-11-23 02:51:47,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:47,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:47,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:47,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2040 proven. 552 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-11-23 02:51:47,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:47,432 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:47,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:47,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:47,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:47,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2040 proven. 552 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-11-23 02:51:47,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:47,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-23 02:51:47,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-23 02:51:47,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-23 02:51:47,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-23 02:51:47,499 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand 26 states. [2018-11-23 02:51:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:47,555 INFO L93 Difference]: Finished difference Result 237 states and 324 transitions. [2018-11-23 02:51:47,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-23 02:51:47,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 142 [2018-11-23 02:51:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:47,556 INFO L225 Difference]: With dead ends: 237 [2018-11-23 02:51:47,556 INFO L226 Difference]: Without dead ends: 145 [2018-11-23 02:51:47,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-23 02:51:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-11-23 02:51:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-11-23 02:51:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-23 02:51:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2018-11-23 02:51:47,563 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 142 [2018-11-23 02:51:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:47,563 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2018-11-23 02:51:47,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-23 02:51:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2018-11-23 02:51:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-23 02:51:47,564 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:47,564 INFO L402 BasicCegarLoop]: trace histogram [67, 43, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:47,564 INFO L423 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:47,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:47,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1926927896, now seen corresponding path program 23 times [2018-11-23 02:51:47,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:47,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:47,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:47,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2125 proven. 600 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-11-23 02:51:47,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:47,792 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:47,797 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:47,860 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-11-23 02:51:47,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:47,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2125 proven. 600 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-11-23 02:51:47,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:47,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-23 02:51:47,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-23 02:51:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-23 02:51:47,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-23 02:51:47,888 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand 27 states. [2018-11-23 02:51:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:47,930 INFO L93 Difference]: Finished difference Result 239 states and 326 transitions. [2018-11-23 02:51:47,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-23 02:51:47,931 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 144 [2018-11-23 02:51:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:47,931 INFO L225 Difference]: With dead ends: 239 [2018-11-23 02:51:47,932 INFO L226 Difference]: Without dead ends: 147 [2018-11-23 02:51:47,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-23 02:51:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-11-23 02:51:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-11-23 02:51:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-23 02:51:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2018-11-23 02:51:47,936 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 144 [2018-11-23 02:51:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:47,936 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2018-11-23 02:51:47,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-23 02:51:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2018-11-23 02:51:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-23 02:51:47,937 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:47,937 INFO L402 BasicCegarLoop]: trace histogram [68, 43, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:47,937 INFO L423 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:47,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:47,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1778341461, now seen corresponding path program 24 times [2018-11-23 02:51:47,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:47,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:47,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:47,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2210 proven. 650 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-11-23 02:51:48,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:48,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:48,136 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:48,195 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-11-23 02:51:48,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:48,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2175 proven. 1849 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-11-23 02:51:49,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:49,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 46] total 72 [2018-11-23 02:51:49,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-23 02:51:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-23 02:51:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-11-23 02:51:49,141 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand 72 states. [2018-11-23 02:51:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:49,397 INFO L93 Difference]: Finished difference Result 244 states and 334 transitions. [2018-11-23 02:51:49,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-23 02:51:49,398 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 146 [2018-11-23 02:51:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:49,398 INFO L225 Difference]: With dead ends: 244 [2018-11-23 02:51:49,398 INFO L226 Difference]: Without dead ends: 152 [2018-11-23 02:51:49,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-11-23 02:51:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-11-23 02:51:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2018-11-23 02:51:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-23 02:51:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2018-11-23 02:51:49,404 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 146 [2018-11-23 02:51:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:49,404 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2018-11-23 02:51:49,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-23 02:51:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2018-11-23 02:51:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-23 02:51:49,405 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:49,405 INFO L402 BasicCegarLoop]: trace histogram [70, 44, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:49,405 INFO L423 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:49,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2090699827, now seen corresponding path program 25 times [2018-11-23 02:51:49,405 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:49,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:49,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:49,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:49,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2349 proven. 702 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:49,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:49,632 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:49,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:49,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2349 proven. 702 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:49,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:49,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-23 02:51:49,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-23 02:51:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-23 02:51:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-23 02:51:49,688 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand 29 states. [2018-11-23 02:51:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:49,746 INFO L93 Difference]: Finished difference Result 247 states and 336 transitions. [2018-11-23 02:51:49,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-23 02:51:49,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2018-11-23 02:51:49,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:49,747 INFO L225 Difference]: With dead ends: 247 [2018-11-23 02:51:49,747 INFO L226 Difference]: Without dead ends: 153 [2018-11-23 02:51:49,747 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-23 02:51:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-23 02:51:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-23 02:51:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-23 02:51:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2018-11-23 02:51:49,752 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 150 [2018-11-23 02:51:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:49,752 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2018-11-23 02:51:49,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-23 02:51:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2018-11-23 02:51:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-23 02:51:49,753 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:49,753 INFO L402 BasicCegarLoop]: trace histogram [71, 44, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:49,753 INFO L423 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:49,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash -690793910, now seen corresponding path program 26 times [2018-11-23 02:51:49,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:49,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:49,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:49,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:49,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2436 proven. 756 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:49,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:49,997 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:50,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:50,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:50,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:50,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2436 proven. 756 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:50,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:50,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-23 02:51:50,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-23 02:51:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-23 02:51:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-23 02:51:50,054 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand 30 states. [2018-11-23 02:51:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:50,104 INFO L93 Difference]: Finished difference Result 249 states and 338 transitions. [2018-11-23 02:51:50,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-23 02:51:50,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 152 [2018-11-23 02:51:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:50,105 INFO L225 Difference]: With dead ends: 249 [2018-11-23 02:51:50,105 INFO L226 Difference]: Without dead ends: 155 [2018-11-23 02:51:50,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-23 02:51:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-23 02:51:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-11-23 02:51:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-11-23 02:51:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2018-11-23 02:51:50,110 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 152 [2018-11-23 02:51:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:50,110 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2018-11-23 02:51:50,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-23 02:51:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2018-11-23 02:51:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-11-23 02:51:50,111 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:50,111 INFO L402 BasicCegarLoop]: trace histogram [72, 44, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:50,111 INFO L423 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:50,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:50,112 INFO L82 PathProgramCache]: Analyzing trace with hash 294028679, now seen corresponding path program 27 times [2018-11-23 02:51:50,112 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:50,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:50,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:50,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:50,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2523 proven. 812 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:50,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:50,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:50,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:50,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-11-23 02:51:50,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:50,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2523 proven. 812 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:50,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:50,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-23 02:51:50,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-23 02:51:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-23 02:51:50,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-23 02:51:50,531 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand 31 states. [2018-11-23 02:51:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:50,597 INFO L93 Difference]: Finished difference Result 251 states and 340 transitions. [2018-11-23 02:51:50,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-23 02:51:50,597 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2018-11-23 02:51:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:50,598 INFO L225 Difference]: With dead ends: 251 [2018-11-23 02:51:50,598 INFO L226 Difference]: Without dead ends: 157 [2018-11-23 02:51:50,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-23 02:51:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-11-23 02:51:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-11-23 02:51:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-23 02:51:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 201 transitions. [2018-11-23 02:51:50,603 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 201 transitions. Word has length 154 [2018-11-23 02:51:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:50,603 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 201 transitions. [2018-11-23 02:51:50,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-23 02:51:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 201 transitions. [2018-11-23 02:51:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-11-23 02:51:50,604 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:50,604 INFO L402 BasicCegarLoop]: trace histogram [73, 44, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:50,604 INFO L423 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:50,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:50,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1815731588, now seen corresponding path program 28 times [2018-11-23 02:51:50,604 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:50,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:50,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:50,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:50,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2610 proven. 870 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:50,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:50,867 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:50,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:50,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:50,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:50,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2610 proven. 870 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:50,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:50,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-23 02:51:50,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-23 02:51:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-23 02:51:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-23 02:51:50,934 INFO L87 Difference]: Start difference. First operand 157 states and 201 transitions. Second operand 32 states. [2018-11-23 02:51:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:50,985 INFO L93 Difference]: Finished difference Result 253 states and 342 transitions. [2018-11-23 02:51:50,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-23 02:51:50,986 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2018-11-23 02:51:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:50,986 INFO L225 Difference]: With dead ends: 253 [2018-11-23 02:51:50,987 INFO L226 Difference]: Without dead ends: 159 [2018-11-23 02:51:50,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-23 02:51:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-23 02:51:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-23 02:51:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-23 02:51:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2018-11-23 02:51:50,990 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 156 [2018-11-23 02:51:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:50,991 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2018-11-23 02:51:50,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-23 02:51:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2018-11-23 02:51:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-23 02:51:50,991 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:50,991 INFO L402 BasicCegarLoop]: trace histogram [74, 44, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:50,992 INFO L423 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:50,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:50,992 INFO L82 PathProgramCache]: Analyzing trace with hash -411620799, now seen corresponding path program 29 times [2018-11-23 02:51:50,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:50,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:50,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:50,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:50,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2697 proven. 930 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:51,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:51,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:51,291 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:51,372 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2018-11-23 02:51:51,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:51,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2697 proven. 930 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:51,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:51,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-23 02:51:51,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-23 02:51:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-23 02:51:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-23 02:51:51,402 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand 33 states. [2018-11-23 02:51:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:51,464 INFO L93 Difference]: Finished difference Result 255 states and 344 transitions. [2018-11-23 02:51:51,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-23 02:51:51,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 158 [2018-11-23 02:51:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:51,465 INFO L225 Difference]: With dead ends: 255 [2018-11-23 02:51:51,465 INFO L226 Difference]: Without dead ends: 161 [2018-11-23 02:51:51,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-23 02:51:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-23 02:51:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-11-23 02:51:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-11-23 02:51:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2018-11-23 02:51:51,470 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 158 [2018-11-23 02:51:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:51,470 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2018-11-23 02:51:51,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-23 02:51:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2018-11-23 02:51:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-23 02:51:51,471 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:51,471 INFO L402 BasicCegarLoop]: trace histogram [75, 44, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:51,471 INFO L423 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:51,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2003551298, now seen corresponding path program 30 times [2018-11-23 02:51:51,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:51,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:51,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:51,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2784 proven. 992 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-11-23 02:51:51,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:51,785 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:51,794 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:51,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2018-11-23 02:51:51,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:51,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2759 proven. 1936 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-11-23 02:51:52,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:52,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 47] total 79 [2018-11-23 02:51:52,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-11-23 02:51:52,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-11-23 02:51:52,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-11-23 02:51:52,995 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 79 states. [2018-11-23 02:51:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:53,301 INFO L93 Difference]: Finished difference Result 260 states and 352 transitions. [2018-11-23 02:51:53,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-23 02:51:53,301 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 160 [2018-11-23 02:51:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:53,302 INFO L225 Difference]: With dead ends: 260 [2018-11-23 02:51:53,302 INFO L226 Difference]: Without dead ends: 166 [2018-11-23 02:51:53,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-11-23 02:51:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-23 02:51:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2018-11-23 02:51:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-23 02:51:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2018-11-23 02:51:53,307 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 160 [2018-11-23 02:51:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:53,307 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2018-11-23 02:51:53,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-11-23 02:51:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2018-11-23 02:51:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-23 02:51:53,308 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:53,308 INFO L402 BasicCegarLoop]: trace histogram [77, 45, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:53,308 INFO L423 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:53,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:53,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1220455370, now seen corresponding path program 31 times [2018-11-23 02:51:53,308 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:53,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:53,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:53,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:53,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2937 proven. 1056 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:53,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:53,677 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:53,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:53,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2937 proven. 1056 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:53,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:53,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-11-23 02:51:53,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-23 02:51:53,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-23 02:51:53,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-23 02:51:53,759 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand 35 states. [2018-11-23 02:51:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:53,806 INFO L93 Difference]: Finished difference Result 263 states and 354 transitions. [2018-11-23 02:51:53,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-23 02:51:53,807 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 164 [2018-11-23 02:51:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:53,807 INFO L225 Difference]: With dead ends: 263 [2018-11-23 02:51:53,807 INFO L226 Difference]: Without dead ends: 167 [2018-11-23 02:51:53,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-23 02:51:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-11-23 02:51:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-11-23 02:51:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-11-23 02:51:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 212 transitions. [2018-11-23 02:51:53,812 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 212 transitions. Word has length 164 [2018-11-23 02:51:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:53,812 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 212 transitions. [2018-11-23 02:51:53,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-23 02:51:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 212 transitions. [2018-11-23 02:51:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-11-23 02:51:53,813 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:53,813 INFO L402 BasicCegarLoop]: trace histogram [78, 45, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:53,814 INFO L423 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:53,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1828230131, now seen corresponding path program 32 times [2018-11-23 02:51:53,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:53,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:53,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:53,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:53,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3026 proven. 1122 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:54,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:54,184 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:54,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:54,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:54,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:54,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3026 proven. 1122 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:54,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:54,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-11-23 02:51:54,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 02:51:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 02:51:54,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 02:51:54,278 INFO L87 Difference]: Start difference. First operand 167 states and 212 transitions. Second operand 36 states. [2018-11-23 02:51:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:54,350 INFO L93 Difference]: Finished difference Result 265 states and 356 transitions. [2018-11-23 02:51:54,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-23 02:51:54,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 166 [2018-11-23 02:51:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:54,351 INFO L225 Difference]: With dead ends: 265 [2018-11-23 02:51:54,351 INFO L226 Difference]: Without dead ends: 169 [2018-11-23 02:51:54,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 02:51:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-11-23 02:51:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-11-23 02:51:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-11-23 02:51:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2018-11-23 02:51:54,355 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 166 [2018-11-23 02:51:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:54,356 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2018-11-23 02:51:54,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 02:51:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2018-11-23 02:51:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-11-23 02:51:54,356 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:54,357 INFO L402 BasicCegarLoop]: trace histogram [79, 45, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:54,357 INFO L423 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:54,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1847666576, now seen corresponding path program 33 times [2018-11-23 02:51:54,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:54,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:54,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:54,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:54,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3115 proven. 1190 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:54,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:54,708 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:54,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:54,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-11-23 02:51:54,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:54,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3115 proven. 1190 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:54,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:54,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-23 02:51:54,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-23 02:51:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-23 02:51:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 02:51:54,825 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand 37 states. [2018-11-23 02:51:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:54,901 INFO L93 Difference]: Finished difference Result 267 states and 358 transitions. [2018-11-23 02:51:54,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-23 02:51:54,902 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 168 [2018-11-23 02:51:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:54,903 INFO L225 Difference]: With dead ends: 267 [2018-11-23 02:51:54,903 INFO L226 Difference]: Without dead ends: 171 [2018-11-23 02:51:54,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 02:51:54,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-23 02:51:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-11-23 02:51:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-11-23 02:51:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2018-11-23 02:51:54,907 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 168 [2018-11-23 02:51:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:54,908 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2018-11-23 02:51:54,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-23 02:51:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2018-11-23 02:51:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-23 02:51:54,908 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:54,908 INFO L402 BasicCegarLoop]: trace histogram [80, 45, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:54,909 INFO L423 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:54,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash 373682605, now seen corresponding path program 34 times [2018-11-23 02:51:54,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:54,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:54,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:54,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:54,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3204 proven. 1260 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:55,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:55,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:55,274 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:55,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:55,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:55,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3204 proven. 1260 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:55,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:55,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-11-23 02:51:55,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-23 02:51:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-23 02:51:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 02:51:55,328 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand 38 states. [2018-11-23 02:51:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:55,397 INFO L93 Difference]: Finished difference Result 269 states and 360 transitions. [2018-11-23 02:51:55,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-23 02:51:55,398 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 170 [2018-11-23 02:51:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:55,399 INFO L225 Difference]: With dead ends: 269 [2018-11-23 02:51:55,399 INFO L226 Difference]: Without dead ends: 173 [2018-11-23 02:51:55,400 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 02:51:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-11-23 02:51:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-11-23 02:51:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-11-23 02:51:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2018-11-23 02:51:55,403 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 170 [2018-11-23 02:51:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:55,403 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2018-11-23 02:51:55,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-23 02:51:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2018-11-23 02:51:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-11-23 02:51:55,404 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:55,404 INFO L402 BasicCegarLoop]: trace histogram [81, 45, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:55,404 INFO L423 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:55,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 491499434, now seen corresponding path program 35 times [2018-11-23 02:51:55,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:55,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:55,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:55,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:55,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3293 proven. 1332 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:55,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:55,780 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:55,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:55,887 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-11-23 02:51:55,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:55,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3293 proven. 1332 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:55,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:55,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-23 02:51:55,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-23 02:51:55,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-23 02:51:55,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-23 02:51:55,938 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand 39 states. [2018-11-23 02:51:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:56,028 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2018-11-23 02:51:56,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-23 02:51:56,029 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 172 [2018-11-23 02:51:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:56,030 INFO L225 Difference]: With dead ends: 271 [2018-11-23 02:51:56,030 INFO L226 Difference]: Without dead ends: 175 [2018-11-23 02:51:56,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-23 02:51:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-11-23 02:51:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-11-23 02:51:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-23 02:51:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 220 transitions. [2018-11-23 02:51:56,038 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 220 transitions. Word has length 172 [2018-11-23 02:51:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:56,038 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 220 transitions. [2018-11-23 02:51:56,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-23 02:51:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 220 transitions. [2018-11-23 02:51:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-23 02:51:56,039 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:56,039 INFO L402 BasicCegarLoop]: trace histogram [82, 45, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:56,041 INFO L423 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:56,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2044322407, now seen corresponding path program 36 times [2018-11-23 02:51:56,041 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:56,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:56,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:56,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:56,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3382 proven. 1406 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:56,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:56,461 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:56,467 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:56,571 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-11-23 02:51:56,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:56,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3382 proven. 1406 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:56,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:56,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-11-23 02:51:56,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-23 02:51:56,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-23 02:51:56,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 02:51:56,624 INFO L87 Difference]: Start difference. First operand 175 states and 220 transitions. Second operand 40 states. [2018-11-23 02:51:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:56,704 INFO L93 Difference]: Finished difference Result 273 states and 364 transitions. [2018-11-23 02:51:56,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-23 02:51:56,705 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 174 [2018-11-23 02:51:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:56,705 INFO L225 Difference]: With dead ends: 273 [2018-11-23 02:51:56,705 INFO L226 Difference]: Without dead ends: 177 [2018-11-23 02:51:56,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 02:51:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-23 02:51:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-11-23 02:51:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-11-23 02:51:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 222 transitions. [2018-11-23 02:51:56,709 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 222 transitions. Word has length 174 [2018-11-23 02:51:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:56,710 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 222 transitions. [2018-11-23 02:51:56,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-23 02:51:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 222 transitions. [2018-11-23 02:51:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-11-23 02:51:56,711 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:56,711 INFO L402 BasicCegarLoop]: trace histogram [83, 45, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:56,711 INFO L423 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:56,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash -341419548, now seen corresponding path program 37 times [2018-11-23 02:51:56,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:56,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:56,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:56,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:56,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3471 proven. 1482 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:57,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:57,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:57,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:57,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3471 proven. 1482 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:57,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:57,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-11-23 02:51:57,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-23 02:51:57,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-23 02:51:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-23 02:51:57,179 INFO L87 Difference]: Start difference. First operand 177 states and 222 transitions. Second operand 41 states. [2018-11-23 02:51:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:57,228 INFO L93 Difference]: Finished difference Result 275 states and 366 transitions. [2018-11-23 02:51:57,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-23 02:51:57,229 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 176 [2018-11-23 02:51:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:57,229 INFO L225 Difference]: With dead ends: 275 [2018-11-23 02:51:57,229 INFO L226 Difference]: Without dead ends: 179 [2018-11-23 02:51:57,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-23 02:51:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-23 02:51:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-11-23 02:51:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-11-23 02:51:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2018-11-23 02:51:57,234 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 176 [2018-11-23 02:51:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:57,234 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2018-11-23 02:51:57,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-23 02:51:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2018-11-23 02:51:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-23 02:51:57,235 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:57,235 INFO L402 BasicCegarLoop]: trace histogram [84, 45, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:57,235 INFO L423 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:57,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash 473097761, now seen corresponding path program 38 times [2018-11-23 02:51:57,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:57,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:57,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:57,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:57,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3560 proven. 1560 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:57,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:57,694 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:57,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:57,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:57,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:57,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3560 proven. 1560 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:57,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:57,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-11-23 02:51:57,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-23 02:51:57,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-23 02:51:57,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-23 02:51:57,763 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand 42 states. [2018-11-23 02:51:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:57,834 INFO L93 Difference]: Finished difference Result 277 states and 368 transitions. [2018-11-23 02:51:57,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-23 02:51:57,834 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 178 [2018-11-23 02:51:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:57,835 INFO L225 Difference]: With dead ends: 277 [2018-11-23 02:51:57,835 INFO L226 Difference]: Without dead ends: 181 [2018-11-23 02:51:57,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-23 02:51:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-11-23 02:51:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-11-23 02:51:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-23 02:51:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2018-11-23 02:51:57,837 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 178 [2018-11-23 02:51:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:57,838 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2018-11-23 02:51:57,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-23 02:51:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2018-11-23 02:51:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-23 02:51:57,838 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:57,838 INFO L402 BasicCegarLoop]: trace histogram [85, 45, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:57,838 INFO L423 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:57,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1540183838, now seen corresponding path program 39 times [2018-11-23 02:51:57,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:57,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:57,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1640 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:58,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:58,296 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:58,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:58,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-11-23 02:51:58,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:58,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1640 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:58,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:58,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-23 02:51:58,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-23 02:51:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-23 02:51:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-23 02:51:58,421 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand 43 states. [2018-11-23 02:51:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:58,491 INFO L93 Difference]: Finished difference Result 279 states and 370 transitions. [2018-11-23 02:51:58,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-23 02:51:58,492 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 180 [2018-11-23 02:51:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:58,492 INFO L225 Difference]: With dead ends: 279 [2018-11-23 02:51:58,493 INFO L226 Difference]: Without dead ends: 183 [2018-11-23 02:51:58,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-23 02:51:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-23 02:51:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-11-23 02:51:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-11-23 02:51:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 228 transitions. [2018-11-23 02:51:58,497 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 228 transitions. Word has length 180 [2018-11-23 02:51:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:58,497 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 228 transitions. [2018-11-23 02:51:58,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-23 02:51:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 228 transitions. [2018-11-23 02:51:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-23 02:51:58,498 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:58,498 INFO L402 BasicCegarLoop]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:58,498 INFO L423 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:58,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:58,498 INFO L82 PathProgramCache]: Analyzing trace with hash 512720091, now seen corresponding path program 40 times [2018-11-23 02:51:58,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:58,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:58,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:58,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:58,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3738 proven. 1722 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:58,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:58,947 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:58,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:58,979 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:58,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:58,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3738 proven. 1722 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:59,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:59,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-11-23 02:51:59,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-23 02:51:59,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-23 02:51:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-23 02:51:59,022 INFO L87 Difference]: Start difference. First operand 183 states and 228 transitions. Second operand 44 states. [2018-11-23 02:51:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:59,081 INFO L93 Difference]: Finished difference Result 281 states and 372 transitions. [2018-11-23 02:51:59,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-23 02:51:59,082 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 182 [2018-11-23 02:51:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:59,082 INFO L225 Difference]: With dead ends: 281 [2018-11-23 02:51:59,082 INFO L226 Difference]: Without dead ends: 185 [2018-11-23 02:51:59,082 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-23 02:51:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-11-23 02:51:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-11-23 02:51:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-11-23 02:51:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 230 transitions. [2018-11-23 02:51:59,086 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 230 transitions. Word has length 182 [2018-11-23 02:51:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:59,086 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 230 transitions. [2018-11-23 02:51:59,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-23 02:51:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 230 transitions. [2018-11-23 02:51:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-23 02:51:59,087 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:59,087 INFO L402 BasicCegarLoop]: trace histogram [87, 45, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:59,087 INFO L423 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:59,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash 962537304, now seen corresponding path program 41 times [2018-11-23 02:51:59,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:59,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:59,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:59,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:59,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3827 proven. 1806 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:59,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:59,572 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:59,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:59,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 88 check-sat command(s) [2018-11-23 02:51:59,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:59,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3827 proven. 1806 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:51:59,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:59,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-23 02:51:59,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-23 02:51:59,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-23 02:51:59,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-23 02:51:59,726 INFO L87 Difference]: Start difference. First operand 185 states and 230 transitions. Second operand 45 states. [2018-11-23 02:51:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:59,817 INFO L93 Difference]: Finished difference Result 283 states and 374 transitions. [2018-11-23 02:51:59,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-23 02:51:59,817 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 184 [2018-11-23 02:51:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:59,818 INFO L225 Difference]: With dead ends: 283 [2018-11-23 02:51:59,818 INFO L226 Difference]: Without dead ends: 187 [2018-11-23 02:51:59,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-23 02:51:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-11-23 02:51:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-11-23 02:51:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-23 02:51:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 232 transitions. [2018-11-23 02:51:59,822 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 232 transitions. Word has length 184 [2018-11-23 02:51:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:59,822 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 232 transitions. [2018-11-23 02:51:59,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-23 02:51:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 232 transitions. [2018-11-23 02:51:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-23 02:51:59,823 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:59,823 INFO L402 BasicCegarLoop]: trace histogram [88, 45, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:59,824 INFO L423 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:59,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash -554817899, now seen corresponding path program 42 times [2018-11-23 02:51:59,824 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:59,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:59,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:59,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:59,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 1892 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-11-23 02:52:00,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:00,291 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:00,300 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:52:00,381 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2018-11-23 02:52:00,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:00,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3913 proven. 2025 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-11-23 02:52:01,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:01,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 48] total 92 [2018-11-23 02:52:01,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-11-23 02:52:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-11-23 02:52:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-11-23 02:52:01,728 INFO L87 Difference]: Start difference. First operand 187 states and 232 transitions. Second operand 92 states. [2018-11-23 02:52:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:02,154 INFO L93 Difference]: Finished difference Result 288 states and 382 transitions. [2018-11-23 02:52:02,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-11-23 02:52:02,155 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 186 [2018-11-23 02:52:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:02,155 INFO L225 Difference]: With dead ends: 288 [2018-11-23 02:52:02,156 INFO L226 Difference]: Without dead ends: 192 [2018-11-23 02:52:02,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-11-23 02:52:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-23 02:52:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-11-23 02:52:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-11-23 02:52:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2018-11-23 02:52:02,160 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 186 [2018-11-23 02:52:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:02,160 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2018-11-23 02:52:02,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-11-23 02:52:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2018-11-23 02:52:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-23 02:52:02,161 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:02,161 INFO L402 BasicCegarLoop]: trace histogram [90, 46, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:02,161 INFO L423 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:02,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1494283021, now seen corresponding path program 43 times [2018-11-23 02:52:02,162 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:02,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:02,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:02,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:02,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 4095 proven. 1980 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-11-23 02:52:02,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:02,718 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:02,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:02,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 4095 proven. 1980 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-11-23 02:52:02,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:02,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-11-23 02:52:02,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-23 02:52:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-23 02:52:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-23 02:52:02,789 INFO L87 Difference]: Start difference. First operand 191 states and 237 transitions. Second operand 47 states. [2018-11-23 02:52:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:02,861 INFO L93 Difference]: Finished difference Result 291 states and 384 transitions. [2018-11-23 02:52:02,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-23 02:52:02,862 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 190 [2018-11-23 02:52:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:02,863 INFO L225 Difference]: With dead ends: 291 [2018-11-23 02:52:02,863 INFO L226 Difference]: Without dead ends: 193 [2018-11-23 02:52:02,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-23 02:52:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-11-23 02:52:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-11-23 02:52:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-11-23 02:52:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 239 transitions. [2018-11-23 02:52:02,867 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 239 transitions. Word has length 190 [2018-11-23 02:52:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:02,867 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 239 transitions. [2018-11-23 02:52:02,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-23 02:52:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 239 transitions. [2018-11-23 02:52:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-23 02:52:02,868 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:02,868 INFO L402 BasicCegarLoop]: trace histogram [91, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:02,868 INFO L423 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:02,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 201379978, now seen corresponding path program 44 times [2018-11-23 02:52:02,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:02,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:02,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:02,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:02,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4186 proven. 2070 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-11-23 02:52:03,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:03,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:03,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:52:03,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:52:03,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:03,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4186 proven. 2070 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-11-23 02:52:03,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:03,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-11-23 02:52:03,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-23 02:52:03,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-23 02:52:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-11-23 02:52:03,493 INFO L87 Difference]: Start difference. First operand 193 states and 239 transitions. Second operand 48 states. [2018-11-23 02:52:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:03,563 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2018-11-23 02:52:03,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-23 02:52:03,563 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 192 [2018-11-23 02:52:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:03,564 INFO L225 Difference]: With dead ends: 293 [2018-11-23 02:52:03,564 INFO L226 Difference]: Without dead ends: 195 [2018-11-23 02:52:03,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-11-23 02:52:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-11-23 02:52:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-11-23 02:52:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-11-23 02:52:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 241 transitions. [2018-11-23 02:52:03,568 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 241 transitions. Word has length 192 [2018-11-23 02:52:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:03,569 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 241 transitions. [2018-11-23 02:52:03,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-23 02:52:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 241 transitions. [2018-11-23 02:52:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-23 02:52:03,570 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:03,570 INFO L402 BasicCegarLoop]: trace histogram [92, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:03,570 INFO L423 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:03,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1032895801, now seen corresponding path program 45 times [2018-11-23 02:52:03,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:03,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:03,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:03,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:03,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 4277 proven. 2162 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-11-23 02:52:04,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:04,104 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:04,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:52:04,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-11-23 02:52:04,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:04,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:52:05,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:05,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 95] total 95 [2018-11-23 02:52:05,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-11-23 02:52:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-11-23 02:52:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-11-23 02:52:05,655 INFO L87 Difference]: Start difference. First operand 195 states and 241 transitions. Second operand 95 states. [2018-11-23 02:52:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:06,075 INFO L93 Difference]: Finished difference Result 301 states and 397 transitions. [2018-11-23 02:52:06,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-11-23 02:52:06,075 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 194 [2018-11-23 02:52:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:06,075 INFO L225 Difference]: With dead ends: 301 [2018-11-23 02:52:06,075 INFO L226 Difference]: Without dead ends: 203 [2018-11-23 02:52:06,076 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-11-23 02:52:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-11-23 02:52:06,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-11-23 02:52:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 02:52:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 249 transitions. [2018-11-23 02:52:06,080 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 249 transitions. Word has length 194 [2018-11-23 02:52:06,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:06,080 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 249 transitions. [2018-11-23 02:52:06,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-11-23 02:52:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 249 transitions. [2018-11-23 02:52:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-11-23 02:52:06,081 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:06,081 INFO L402 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:06,082 INFO L423 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:06,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1281156293, now seen corresponding path program 46 times [2018-11-23 02:52:06,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:06,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:06,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:06,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:06,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 4656 proven. 2304 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-11-23 02:52:06,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:06,668 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:06,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:52:06,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:52:06,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:06,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:52:07,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:07,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 99] total 101 [2018-11-23 02:52:07,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-11-23 02:52:07,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-11-23 02:52:07,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-11-23 02:52:07,383 INFO L87 Difference]: Start difference. First operand 203 states and 249 transitions. Second operand 101 states. [2018-11-23 02:52:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:07,853 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2018-11-23 02:52:07,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-11-23 02:52:07,854 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 202 [2018-11-23 02:52:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:07,855 INFO L225 Difference]: With dead ends: 215 [2018-11-23 02:52:07,855 INFO L226 Difference]: Without dead ends: 210 [2018-11-23 02:52:07,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-11-23 02:52:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-11-23 02:52:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-11-23 02:52:07,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-11-23 02:52:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2018-11-23 02:52:07,859 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 202 [2018-11-23 02:52:07,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:07,860 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2018-11-23 02:52:07,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-11-23 02:52:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2018-11-23 02:52:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-23 02:52:07,861 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:07,861 INFO L402 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:07,862 INFO L423 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:07,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1190218156, now seen corresponding path program 47 times [2018-11-23 02:52:07,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:07,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:07,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:07,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:07,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-11-23 02:52:08,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:08,537 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:08,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:52:08,642 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2018-11-23 02:52:08,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:08,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-11-23 02:52:08,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:08,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-11-23 02:52:08,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-23 02:52:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-23 02:52:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 02:52:08,679 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand 52 states. [2018-11-23 02:52:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:08,846 INFO L93 Difference]: Finished difference Result 216 states and 266 transitions. [2018-11-23 02:52:08,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-23 02:52:08,847 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 208 [2018-11-23 02:52:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:08,848 INFO L225 Difference]: With dead ends: 216 [2018-11-23 02:52:08,848 INFO L226 Difference]: Without dead ends: 211 [2018-11-23 02:52:08,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 02:52:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-11-23 02:52:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-11-23 02:52:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-23 02:52:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2018-11-23 02:52:08,853 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 208 [2018-11-23 02:52:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:08,853 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2018-11-23 02:52:08,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-23 02:52:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2018-11-23 02:52:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-23 02:52:08,854 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:08,854 INFO L402 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:08,854 INFO L423 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:08,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1853582425, now seen corresponding path program 48 times [2018-11-23 02:52:08,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:08,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:08,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:08,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:08,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-11-23 02:52:09,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:09,883 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:09,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:52:09,991 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2018-11-23 02:52:09,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:09,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-11-23 02:52:10,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:10,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-11-23 02:52:10,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-23 02:52:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-23 02:52:10,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 02:52:10,149 INFO L87 Difference]: Start difference. First operand 211 states and 261 transitions. Second operand 55 states. [2018-11-23 02:52:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:11,025 INFO L93 Difference]: Finished difference Result 2867 states and 4242 transitions. [2018-11-23 02:52:11,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-23 02:52:11,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 210 [2018-11-23 02:52:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:11,030 INFO L225 Difference]: With dead ends: 2867 [2018-11-23 02:52:11,030 INFO L226 Difference]: Without dead ends: 2862 [2018-11-23 02:52:11,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-11-23 02:52:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2018-11-23 02:52:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 213. [2018-11-23 02:52:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-11-23 02:52:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 264 transitions. [2018-11-23 02:52:11,063 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 264 transitions. Word has length 210 [2018-11-23 02:52:11,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:11,064 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 264 transitions. [2018-11-23 02:52:11,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-23 02:52:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 264 transitions. [2018-11-23 02:52:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-23 02:52:11,065 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:11,065 INFO L402 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:11,065 INFO L423 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:11,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2073212190, now seen corresponding path program 49 times [2018-11-23 02:52:11,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:11,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:11,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:11,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:11,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-11-23 02:52:11,750 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:52:11,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-11-23 02:52:11,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-23 02:52:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-23 02:52:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 02:52:11,751 INFO L87 Difference]: Start difference. First operand 213 states and 264 transitions. Second operand 52 states. [2018-11-23 02:52:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:11,874 INFO L93 Difference]: Finished difference Result 312 states and 412 transitions. [2018-11-23 02:52:11,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-23 02:52:11,874 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 212 [2018-11-23 02:52:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:11,874 INFO L225 Difference]: With dead ends: 312 [2018-11-23 02:52:11,875 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 02:52:11,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 02:52:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 02:52:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 02:52:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 02:52:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 02:52:11,876 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 212 [2018-11-23 02:52:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:11,876 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 02:52:11,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-23 02:52:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 02:52:11,876 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 02:52:11,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 02:52:12,453 WARN L180 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-11-23 02:52:13,542 WARN L180 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-11-23 02:52:13,565 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 02:52:13,565 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 02:52:13,565 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 02:52:13,565 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 02:52:13,565 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 02:52:13,565 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 02:52:13,565 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2018-11-23 02:52:13,565 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2018-11-23 02:52:13,565 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-11-23 02:52:13,566 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2018-11-23 02:52:13,566 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 23) no Hoare annotation was computed. [2018-11-23 02:52:13,567 INFO L444 ceAbstractionStarter]: At program point L14-2(lines 13 20) the Hoare annotation is: (or (and (and (<= main_~x~0 99) (<= 99 main_~y~0) (<= main_~y~0 99)) (<= 99 main_~x~0)) (and (and (<= main_~y~0 92) (<= 92 main_~y~0) (<= main_~x~0 92)) (<= 92 main_~x~0)) (and (<= 65 main_~x~0) (and (<= main_~y~0 65) (<= 65 main_~y~0) (<= main_~x~0 65))) (and (and (<= main_~y~0 100) (< 99 main_~y~0)) (<= 100 main_~x~0)) (and (<= 64 main_~x~0) (and (<= main_~x~0 64) (<= 64 main_~y~0) (<= main_~y~0 64))) (and (<= 76 main_~x~0) (and (<= main_~y~0 76) (<= main_~x~0 76) (<= 76 main_~y~0))) (and (<= 87 main_~x~0) (and (<= main_~x~0 87) (<= main_~y~0 87) (<= 87 main_~y~0))) (and (and (<= main_~y~0 78) (<= 78 main_~y~0) (<= main_~x~0 78)) (<= 78 main_~x~0)) (and (<= 72 main_~x~0) (and (<= main_~y~0 72) (<= main_~x~0 72) (<= 72 main_~y~0))) (and (and (<= main_~y~0 69) (<= 69 main_~y~0) (<= main_~x~0 69)) (<= 69 main_~x~0)) (and (<= 60 main_~x~0) (and (<= main_~x~0 60) (<= main_~y~0 60) (<= 60 main_~y~0))) (and (<= 67 main_~x~0) (and (<= main_~y~0 67) (<= main_~x~0 67) (<= 67 main_~y~0))) (and (and (<= main_~y~0 55) (<= 55 main_~y~0) (<= main_~x~0 55)) (<= 55 main_~x~0)) (and (and (<= 73 main_~y~0) (<= main_~x~0 73) (<= main_~y~0 73)) (<= 73 main_~x~0)) (and (<= 66 main_~x~0) (and (<= main_~y~0 66) (<= 66 main_~y~0) (<= main_~x~0 66))) (and (and (<= main_~x~0 70) (<= main_~y~0 70) (<= 70 main_~y~0)) (<= 70 main_~x~0)) (and (and (<= main_~x~0 95) (<= main_~y~0 95) (<= 95 main_~y~0)) (<= 95 main_~x~0)) (and (and (<= 90 main_~y~0) (<= main_~y~0 90) (<= main_~x~0 90)) (<= 90 main_~x~0)) (and (and (<= main_~y~0 59) (<= main_~x~0 59) (<= 59 main_~y~0)) (<= 59 main_~x~0)) (and (<= 85 main_~x~0) (and (<= 85 main_~y~0) (<= main_~x~0 85) (<= main_~y~0 85))) (and (<= 63 main_~x~0) (and (<= main_~y~0 63) (<= main_~x~0 63) (<= 63 main_~y~0))) (and (and (<= main_~y~0 77) (<= main_~x~0 77) (<= 77 main_~y~0)) (<= 77 main_~x~0)) (and (<= 53 main_~x~0) (and (<= main_~y~0 53) (<= main_~x~0 53) (<= 53 main_~y~0))) (and (and (<= main_~x~0 79) (<= main_~y~0 79) (<= 79 main_~y~0)) (<= 79 main_~x~0)) (and (<= 68 main_~x~0) (and (<= 68 main_~y~0) (<= main_~y~0 68) (<= main_~x~0 68))) (and (<= 51 main_~x~0) (and (<= 51 main_~y~0) (<= main_~x~0 51) (<= main_~y~0 51))) (and (<= 54 main_~x~0) (and (<= main_~x~0 54) (<= 54 main_~y~0) (<= main_~y~0 54))) (and (and (<= 56 main_~y~0) (<= main_~x~0 56) (<= main_~y~0 56)) (<= 56 main_~x~0)) (and (<= 61 main_~x~0) (and (<= main_~y~0 61) (<= 61 main_~y~0) (<= main_~x~0 61))) (and (<= 88 main_~x~0) (and (<= main_~x~0 88) (<= main_~y~0 88) (<= 88 main_~y~0))) (and (<= main_~y~0 50) (<= main_~x~0 50) (<= 50 main_~y~0)) (and (<= 80 main_~x~0) (and (<= main_~x~0 80) (<= 80 main_~y~0) (<= main_~y~0 80))) (and (<= 94 main_~x~0) (and (<= main_~x~0 94) (<= main_~y~0 94) (<= 94 main_~y~0))) (and (<= 89 main_~x~0) (and (<= 89 main_~y~0) (<= main_~y~0 89) (<= main_~x~0 89))) (and (and (<= 86 main_~y~0) (<= main_~x~0 86) (<= main_~y~0 86)) (<= 86 main_~x~0)) (and (<= 58 main_~x~0) (and (<= main_~x~0 58) (<= main_~y~0 58) (<= 58 main_~y~0))) (and (and (<= main_~x~0 91) (<= 91 main_~y~0) (<= main_~y~0 91)) (<= 91 main_~x~0)) (and (and (<= 52 main_~y~0) (<= main_~y~0 52) (<= main_~x~0 52)) (<= 52 main_~x~0)) (and (<= 93 main_~x~0) (and (<= main_~x~0 93) (<= 93 main_~y~0) (<= main_~y~0 93))) (and (<= 74 main_~x~0) (and (<= 74 main_~y~0) (<= main_~y~0 74) (<= main_~x~0 74))) (and (and (<= main_~y~0 71) (<= main_~x~0 71) (<= 71 main_~y~0)) (<= 71 main_~x~0)) (and (<= 57 main_~x~0) (and (<= 57 main_~y~0) (<= main_~x~0 57) (<= main_~y~0 57))) (and (<= 97 main_~x~0) (and (<= 97 main_~y~0) (<= main_~x~0 97) (<= main_~y~0 97))) (and (and (<= main_~x~0 81) (<= 81 main_~y~0) (<= main_~y~0 81)) (<= 81 main_~x~0)) (and (<= 84 main_~x~0) (and (<= main_~y~0 84) (<= 84 main_~y~0) (<= main_~x~0 84))) (and (and (<= 96 main_~y~0) (<= main_~x~0 96) (<= main_~y~0 96)) (<= 96 main_~x~0)) (and (<= 83 main_~x~0) (and (<= main_~y~0 83) (<= 83 main_~y~0) (<= main_~x~0 83))) (and (<= 62 main_~x~0) (and (<= main_~y~0 62) (<= main_~x~0 62) (<= 62 main_~y~0))) (and (and (<= main_~x~0 98) (<= main_~y~0 98) (<= 98 main_~y~0)) (<= 98 main_~x~0)) (and (and (<= 75 main_~y~0) (<= main_~x~0 75) (<= main_~y~0 75)) (<= 75 main_~x~0)) (and (and (<= 82 main_~y~0) (<= main_~y~0 82) (<= main_~x~0 82)) (<= 82 main_~x~0))) [2018-11-23 02:52:13,567 INFO L444 ceAbstractionStarter]: At program point L13-2(lines 13 20) the Hoare annotation is: (and (<= main_~y~0 100) (< 99 main_~y~0)) [2018-11-23 02:52:13,567 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-23 02:52:13,567 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-23 02:52:13,567 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 02:52:13,567 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-23 02:52:13,567 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-23 02:52:13,567 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-23 02:52:13,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:52:13 BoogieIcfgContainer [2018-11-23 02:52:13,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 02:52:13,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 02:52:13,588 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 02:52:13,589 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 02:52:13,593 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:40" (3/4) ... [2018-11-23 02:52:13,596 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 02:52:13,603 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 02:52:13,603 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 02:52:13,603 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 02:52:13,606 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 02:52:13,606 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 02:52:13,606 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 02:52:13,639 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b32b7623-d880-4024-aa94-69c55a2691a3/bin-2019/uautomizer/witness.graphml [2018-11-23 02:52:13,640 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 02:52:13,640 INFO L168 Benchmark]: Toolchain (without parser) took 33627.18 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 752.4 MB). Free memory was 959.1 MB in the beginning and 1.5 GB in the end (delta: -513.4 MB). Peak memory consumption was 238.9 MB. Max. memory is 11.5 GB. [2018-11-23 02:52:13,641 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:52:13,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.61 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-23 02:52:13,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.01 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:52:13,644 INFO L168 Benchmark]: Boogie Preprocessor took 11.85 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 02:52:13,645 INFO L168 Benchmark]: RCFGBuilder took 181.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -169.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-23 02:52:13,645 INFO L168 Benchmark]: TraceAbstraction took 33223.00 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 613.9 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -357.0 MB). Peak memory consumption was 927.1 MB. Max. memory is 11.5 GB. [2018-11-23 02:52:13,645 INFO L168 Benchmark]: Witness Printer took 51.43 ms. Allocated memory is still 1.8 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:52:13,647 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.61 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.01 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.85 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 181.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -169.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 33223.00 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 613.9 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -357.0 MB). Peak memory consumption was 927.1 MB. Max. memory is 11.5 GB. * Witness Printer took 51.43 ms. Allocated memory is still 1.8 GB. Free memory is still 1.5 GB. There was no memory consumed. 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: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 99 && 99 <= y) && y <= 99) && 99 <= x) || (((y <= 92 && 92 <= y) && x <= 92) && 92 <= x)) || (65 <= x && (y <= 65 && 65 <= y) && x <= 65)) || ((y <= 100 && 99 < y) && 100 <= x)) || (64 <= x && (x <= 64 && 64 <= y) && y <= 64)) || (76 <= x && (y <= 76 && x <= 76) && 76 <= y)) || (87 <= x && (x <= 87 && y <= 87) && 87 <= y)) || (((y <= 78 && 78 <= y) && x <= 78) && 78 <= x)) || (72 <= x && (y <= 72 && x <= 72) && 72 <= y)) || (((y <= 69 && 69 <= y) && x <= 69) && 69 <= x)) || (60 <= x && (x <= 60 && y <= 60) && 60 <= y)) || (67 <= x && (y <= 67 && x <= 67) && 67 <= y)) || (((y <= 55 && 55 <= y) && x <= 55) && 55 <= x)) || (((73 <= y && x <= 73) && y <= 73) && 73 <= x)) || (66 <= x && (y <= 66 && 66 <= y) && x <= 66)) || (((x <= 70 && y <= 70) && 70 <= y) && 70 <= x)) || (((x <= 95 && y <= 95) && 95 <= y) && 95 <= x)) || (((90 <= y && y <= 90) && x <= 90) && 90 <= x)) || (((y <= 59 && x <= 59) && 59 <= y) && 59 <= x)) || (85 <= x && (85 <= y && x <= 85) && y <= 85)) || (63 <= x && (y <= 63 && x <= 63) && 63 <= y)) || (((y <= 77 && x <= 77) && 77 <= y) && 77 <= x)) || (53 <= x && (y <= 53 && x <= 53) && 53 <= y)) || (((x <= 79 && y <= 79) && 79 <= y) && 79 <= x)) || (68 <= x && (68 <= y && y <= 68) && x <= 68)) || (51 <= x && (51 <= y && x <= 51) && y <= 51)) || (54 <= x && (x <= 54 && 54 <= y) && y <= 54)) || (((56 <= y && x <= 56) && y <= 56) && 56 <= x)) || (61 <= x && (y <= 61 && 61 <= y) && x <= 61)) || (88 <= x && (x <= 88 && y <= 88) && 88 <= y)) || ((y <= 50 && x <= 50) && 50 <= y)) || (80 <= x && (x <= 80 && 80 <= y) && y <= 80)) || (94 <= x && (x <= 94 && y <= 94) && 94 <= y)) || (89 <= x && (89 <= y && y <= 89) && x <= 89)) || (((86 <= y && x <= 86) && y <= 86) && 86 <= x)) || (58 <= x && (x <= 58 && y <= 58) && 58 <= y)) || (((x <= 91 && 91 <= y) && y <= 91) && 91 <= x)) || (((52 <= y && y <= 52) && x <= 52) && 52 <= x)) || (93 <= x && (x <= 93 && 93 <= y) && y <= 93)) || (74 <= x && (74 <= y && y <= 74) && x <= 74)) || (((y <= 71 && x <= 71) && 71 <= y) && 71 <= x)) || (57 <= x && (57 <= y && x <= 57) && y <= 57)) || (97 <= x && (97 <= y && x <= 97) && y <= 97)) || (((x <= 81 && 81 <= y) && y <= 81) && 81 <= x)) || (84 <= x && (y <= 84 && 84 <= y) && x <= 84)) || (((96 <= y && x <= 96) && y <= 96) && 96 <= x)) || (83 <= x && (y <= 83 && 83 <= y) && x <= 83)) || (62 <= x && (y <= 62 && x <= 62) && 62 <= y)) || (((x <= 98 && y <= 98) && 98 <= y) && 98 <= x)) || (((75 <= y && x <= 75) && y <= 75) && 75 <= x)) || (((82 <= y && y <= 82) && x <= 82) && 82 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 33.1s OverallTime, 52 OverallIterations, 101 TraceHistogramMax, 5.7s AutomataDifference, 0.0s DeadEndRemovalTime, 1.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 665 SDtfs, 732 SDslu, 12576 SDs, 0 SdLazy, 7965 SolverSat, 1933 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7322 GetRequests, 5642 SyntacticMatches, 3 SemanticMatches, 1677 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 19.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 2660 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 58 PreInvPairs, 160 NumberOfFragments, 720 HoareAnnotationTreeSize, 58 FomulaSimplifications, 13400 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 7 FomulaSimplificationsInter, 200 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 21.3s InterpolantComputationTime, 12104 NumberOfCodeBlocks, 12030 NumberOfCodeBlocksAsserted, 1489 NumberOfCheckSat, 12003 ConstructedInterpolants, 0 QuantifiedInterpolants, 3964701 SizeOfPredicates, 15 NumberOfNonLiveVariables, 14846 ConjunctsInSsa, 1552 ConjunctsInUnsatCore, 101 InterpolantComputations, 4 PerfectInterpolantSequences, 295786/406427 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...