./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 0.1.23-1dbac8b [2018-10-26 21:58:59,669 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:58:59,670 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:58:59,678 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:58:59,678 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:58:59,679 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:58:59,680 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:58:59,681 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:58:59,683 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:58:59,683 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:58:59,684 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:58:59,684 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:58:59,685 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:58:59,686 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:58:59,687 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:58:59,688 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:58:59,688 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:58:59,690 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:58:59,691 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:58:59,692 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:58:59,694 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:58:59,695 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:58:59,696 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:58:59,697 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:58:59,697 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:58:59,698 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:58:59,699 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:58:59,699 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:58:59,700 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:58:59,701 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:58:59,701 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:58:59,702 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:58:59,702 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:58:59,702 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:58:59,703 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:58:59,703 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:58:59,704 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 21:58:59,715 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:58:59,715 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:58:59,716 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:58:59,716 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 21:58:59,716 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 21:58:59,716 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 21:58:59,716 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 21:58:59,717 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:58:59,717 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:58:59,717 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:58:59,718 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:58:59,718 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:58:59,718 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:58:59,718 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:58:59,718 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:58:59,719 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:58:59,719 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:58:59,719 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:58:59,719 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:58:59,719 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:58:59,719 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:58:59,719 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:58:59,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:58:59,720 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:58:59,720 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:58:59,720 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:58:59,720 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 21:58:59,720 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:58:59,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:58:59,721 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_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:58:59,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:58:59,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:58:59,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:58:59,760 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:58:59,760 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:58:59,761 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-10-26 21:58:59,805 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/data/038dadff7/691567b2661a4482b63c261e99ff8e22/FLAG096f67e36 [2018-10-26 21:59:00,152 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:59:00,153 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-10-26 21:59:00,158 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/data/038dadff7/691567b2661a4482b63c261e99ff8e22/FLAG096f67e36 [2018-10-26 21:59:00,169 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/data/038dadff7/691567b2661a4482b63c261e99ff8e22 [2018-10-26 21:59:00,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:59:00,173 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 21:59:00,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:59:00,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:59:00,178 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:59:00,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43804fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00, skipping insertion in model container [2018-10-26 21:59:00,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:59:00,204 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:59:00,315 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:59:00,319 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:59:00,331 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:59:00,341 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:59:00,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00 WrapperNode [2018-10-26 21:59:00,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:59:00,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:59:00,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:59:00,342 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:59:00,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... [2018-10-26 21:59:00,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:59:00,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:59:00,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:59:00,367 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:59:00,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:59:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:59:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 21:59:00,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:59:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 21:59:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-10-26 21:59:00,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 21:59:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-10-26 21:59:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:59:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:59:00,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:59:00,712 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:59:00,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:59:00 BoogieIcfgContainer [2018-10-26 21:59:00,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:59:00,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:59:00,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:59:00,717 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:59:00,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:59:00" (1/3) ... [2018-10-26 21:59:00,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a66d17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:59:00, skipping insertion in model container [2018-10-26 21:59:00,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:59:00" (2/3) ... [2018-10-26 21:59:00,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a66d17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:59:00, skipping insertion in model container [2018-10-26 21:59:00,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:59:00" (3/3) ... [2018-10-26 21:59:00,721 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call_true-termination.c.i [2018-10-26 21:59:00,730 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:59:00,737 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:59:00,751 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:59:00,778 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:59:00,778 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:59:00,778 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:59:00,778 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:59:00,779 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:59:00,779 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:59:00,779 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:59:00,779 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:59:00,779 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:59:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 21:59:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 21:59:00,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:00,801 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:00,803 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:00,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2018-10-26 21:59:00,811 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:00,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:00,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:00,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:00,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:00,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:59:00,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 21:59:00,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 21:59:00,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 21:59:00,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 21:59:00,920 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-26 21:59:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:00,936 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-26 21:59:00,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 21:59:00,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 21:59:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:00,945 INFO L225 Difference]: With dead ends: 32 [2018-10-26 21:59:00,946 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 21:59:00,948 INFO L605 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 [2018-10-26 21:59:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 21:59:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 21:59:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 21:59:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-26 21:59:00,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-26 21:59:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:00,980 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-26 21:59:00,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 21:59:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-26 21:59:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 21:59:00,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:00,982 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:00,982 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:00,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash -717461825, now seen corresponding path program 1 times [2018-10-26 21:59:00,983 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:00,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:00,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:00,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:00,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:01,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:59:01,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:59:01,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:59:01,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:59:01,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:59:01,063 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-10-26 21:59:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:01,143 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-10-26 21:59:01,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:59:01,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 21:59:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:01,146 INFO L225 Difference]: With dead ends: 24 [2018-10-26 21:59:01,147 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 21:59:01,147 INFO L605 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 [2018-10-26 21:59:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 21:59:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 21:59:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 21:59:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-26 21:59:01,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-10-26 21:59:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:01,153 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-26 21:59:01,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:59:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-26 21:59:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 21:59:01,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:01,153 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:01,154 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:01,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash 64649018, now seen corresponding path program 1 times [2018-10-26 21:59:01,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:01,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:01,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:01,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:01,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:01,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:01,219 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:01,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:01,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:01,304 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 21:59:01,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-26 21:59:01,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:59:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:59:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:59:01,306 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2018-10-26 21:59:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:01,355 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2018-10-26 21:59:01,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:59:01,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-26 21:59:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:01,358 INFO L225 Difference]: With dead ends: 30 [2018-10-26 21:59:01,358 INFO L226 Difference]: Without dead ends: 22 [2018-10-26 21:59:01,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:59:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-26 21:59:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-26 21:59:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 21:59:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-26 21:59:01,361 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2018-10-26 21:59:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:01,361 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-26 21:59:01,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:59:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-26 21:59:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 21:59:01,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:01,362 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:01,362 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:01,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1748455324, now seen corresponding path program 1 times [2018-10-26 21:59:01,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:01,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:01,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:01,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:01,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:01,418 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:01,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:01,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:01,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:01,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-26 21:59:01,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:59:01,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:59:01,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:59:01,494 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-26 21:59:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:01,630 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-10-26 21:59:01,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:59:01,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-26 21:59:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:01,632 INFO L225 Difference]: With dead ends: 34 [2018-10-26 21:59:01,632 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 21:59:01,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:59:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 21:59:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-26 21:59:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 21:59:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-26 21:59:01,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2018-10-26 21:59:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:01,635 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-26 21:59:01,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:59:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-26 21:59:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-26 21:59:01,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:01,636 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:01,636 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:01,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1045128831, now seen corresponding path program 2 times [2018-10-26 21:59:01,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:01,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:01,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:01,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:01,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:01,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:01,823 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 21:59:01,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:59:01,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:01,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:01,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:59:02,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:02,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-10-26 21:59:02,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 21:59:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 21:59:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:59:02,086 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2018-10-26 21:59:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:02,194 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2018-10-26 21:59:02,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 21:59:02,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-10-26 21:59:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:02,198 INFO L225 Difference]: With dead ends: 47 [2018-10-26 21:59:02,205 INFO L226 Difference]: Without dead ends: 37 [2018-10-26 21:59:02,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 21:59:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-26 21:59:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-10-26 21:59:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-26 21:59:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-10-26 21:59:02,212 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 23 [2018-10-26 21:59:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:02,213 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-10-26 21:59:02,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 21:59:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-10-26 21:59:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-26 21:59:02,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:02,215 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:02,215 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:02,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:02,215 INFO L82 PathProgramCache]: Analyzing trace with hash -31153985, now seen corresponding path program 3 times [2018-10-26 21:59:02,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:02,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:02,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:02,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:02,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-26 21:59:02,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:02,282 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:02,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:02,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-26 21:59:02,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:02,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 56 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-26 21:59:02,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:02,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-26 21:59:02,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 21:59:02,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 21:59:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:59:02,416 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2018-10-26 21:59:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:02,528 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2018-10-26 21:59:02,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:59:02,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2018-10-26 21:59:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:02,530 INFO L225 Difference]: With dead ends: 62 [2018-10-26 21:59:02,530 INFO L226 Difference]: Without dead ends: 43 [2018-10-26 21:59:02,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:59:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-26 21:59:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2018-10-26 21:59:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 21:59:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-10-26 21:59:02,538 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 35 [2018-10-26 21:59:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:02,538 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-10-26 21:59:02,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 21:59:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-10-26 21:59:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-26 21:59:02,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:02,539 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:02,540 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:02,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash 966979169, now seen corresponding path program 4 times [2018-10-26 21:59:02,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:02,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:02,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:02,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:02,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 84 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 21:59:02,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:02,607 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:02,628 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:02,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:02,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:02,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 84 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 21:59:02,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:02,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 21:59:02,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 21:59:02,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 21:59:02,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:59:02,666 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2018-10-26 21:59:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:02,728 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-10-26 21:59:02,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 21:59:02,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-10-26 21:59:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:02,734 INFO L225 Difference]: With dead ends: 67 [2018-10-26 21:59:02,734 INFO L226 Difference]: Without dead ends: 45 [2018-10-26 21:59:02,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:59:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-26 21:59:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-26 21:59:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-26 21:59:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-10-26 21:59:02,743 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 41 [2018-10-26 21:59:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:02,744 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2018-10-26 21:59:02,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 21:59:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2018-10-26 21:59:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-26 21:59:02,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:02,745 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:02,745 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:02,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash 404567452, now seen corresponding path program 5 times [2018-10-26 21:59:02,745 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:02,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:02,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:02,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:02,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 98 proven. 63 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 21:59:03,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:03,079 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:03,086 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:03,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 21:59:03,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:03,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 98 proven. 63 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 21:59:03,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:03,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 21:59:03,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 21:59:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 21:59:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:59:03,219 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 9 states. [2018-10-26 21:59:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:03,427 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2018-10-26 21:59:03,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 21:59:03,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-10-26 21:59:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:03,428 INFO L225 Difference]: With dead ends: 70 [2018-10-26 21:59:03,428 INFO L226 Difference]: Without dead ends: 48 [2018-10-26 21:59:03,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:59:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-26 21:59:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-26 21:59:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-26 21:59:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2018-10-26 21:59:03,435 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2018-10-26 21:59:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:03,436 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2018-10-26 21:59:03,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 21:59:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2018-10-26 21:59:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-26 21:59:03,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:03,437 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:03,437 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:03,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 264528001, now seen corresponding path program 6 times [2018-10-26 21:59:03,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:03,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:03,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:03,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:03,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 112 proven. 84 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-26 21:59:03,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:03,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:03,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:03,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-26 21:59:03,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:03,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 104 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-26 21:59:03,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:03,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-10-26 21:59:03,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 21:59:03,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 21:59:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 21:59:03,800 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 19 states. [2018-10-26 21:59:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:03,906 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2018-10-26 21:59:03,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 21:59:03,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-10-26 21:59:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:03,907 INFO L225 Difference]: With dead ends: 86 [2018-10-26 21:59:03,907 INFO L226 Difference]: Without dead ends: 64 [2018-10-26 21:59:03,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 21:59:03,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-26 21:59:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2018-10-26 21:59:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-26 21:59:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2018-10-26 21:59:03,914 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 47 [2018-10-26 21:59:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:03,915 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2018-10-26 21:59:03,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 21:59:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2018-10-26 21:59:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 21:59:03,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:03,916 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:03,916 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:03,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1099843140, now seen corresponding path program 7 times [2018-10-26 21:59:03,917 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:03,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:03,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:03,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:03,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 234 proven. 108 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 21:59:04,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:04,033 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:04,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:04,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 234 proven. 108 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 21:59:04,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:04,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 21:59:04,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 21:59:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 21:59:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 21:59:04,108 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 11 states. [2018-10-26 21:59:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:04,151 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-10-26 21:59:04,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:59:04,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2018-10-26 21:59:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:04,153 INFO L225 Difference]: With dead ends: 100 [2018-10-26 21:59:04,153 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 21:59:04,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 21:59:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 21:59:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-26 21:59:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-26 21:59:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2018-10-26 21:59:04,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 62 [2018-10-26 21:59:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:04,159 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2018-10-26 21:59:04,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 21:59:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2018-10-26 21:59:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-26 21:59:04,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:04,160 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:04,161 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:04,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1479813791, now seen corresponding path program 8 times [2018-10-26 21:59:04,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:04,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:04,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:04,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:04,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 260 proven. 135 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 21:59:04,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:04,291 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:04,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:59:04,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:04,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:04,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 260 proven. 135 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 21:59:04,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:04,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 21:59:04,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 21:59:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 21:59:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:59:04,351 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 12 states. [2018-10-26 21:59:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:04,391 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2018-10-26 21:59:04,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:59:04,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2018-10-26 21:59:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:04,393 INFO L225 Difference]: With dead ends: 103 [2018-10-26 21:59:04,393 INFO L226 Difference]: Without dead ends: 69 [2018-10-26 21:59:04,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 21:59:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-26 21:59:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-26 21:59:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-26 21:59:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2018-10-26 21:59:04,400 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 65 [2018-10-26 21:59:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:04,400 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2018-10-26 21:59:04,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 21:59:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2018-10-26 21:59:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 21:59:04,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:04,401 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:04,403 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:04,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:04,403 INFO L82 PathProgramCache]: Analyzing trace with hash 348314524, now seen corresponding path program 9 times [2018-10-26 21:59:04,403 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:04,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:04,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:04,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:04,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 286 proven. 165 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-10-26 21:59:04,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:04,542 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:04,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:04,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-26 21:59:04,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:04,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 290 proven. 126 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-10-26 21:59:04,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:04,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2018-10-26 21:59:04,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 21:59:04,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 21:59:04,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 21:59:04,755 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 23 states. [2018-10-26 21:59:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:04,871 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2018-10-26 21:59:04,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 21:59:04,871 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2018-10-26 21:59:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:04,872 INFO L225 Difference]: With dead ends: 110 [2018-10-26 21:59:04,872 INFO L226 Difference]: Without dead ends: 76 [2018-10-26 21:59:04,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 21:59:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-26 21:59:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2018-10-26 21:59:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-26 21:59:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2018-10-26 21:59:04,881 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 68 [2018-10-26 21:59:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:04,882 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2018-10-26 21:59:04,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 21:59:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2018-10-26 21:59:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-26 21:59:04,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:04,883 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:04,883 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:04,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash 464166330, now seen corresponding path program 10 times [2018-10-26 21:59:04,883 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:04,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:04,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:04,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:04,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 348 proven. 198 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 21:59:05,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:05,013 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:05,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:05,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:05,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:05,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 348 proven. 198 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 21:59:05,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:05,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-26 21:59:05,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 21:59:05,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 21:59:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 21:59:05,081 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 14 states. [2018-10-26 21:59:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:05,148 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2018-10-26 21:59:05,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 21:59:05,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-10-26 21:59:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:05,149 INFO L225 Difference]: With dead ends: 115 [2018-10-26 21:59:05,149 INFO L226 Difference]: Without dead ends: 78 [2018-10-26 21:59:05,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 21:59:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-26 21:59:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-26 21:59:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-26 21:59:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2018-10-26 21:59:05,155 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 74 [2018-10-26 21:59:05,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:05,155 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2018-10-26 21:59:05,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 21:59:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2018-10-26 21:59:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-26 21:59:05,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:05,156 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:05,156 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:05,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:05,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1512532447, now seen corresponding path program 11 times [2018-10-26 21:59:05,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:05,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:05,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:05,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:05,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 377 proven. 234 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 21:59:05,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:05,495 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:05,502 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:05,538 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-26 21:59:05,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:05,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 377 proven. 234 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 21:59:05,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:05,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-26 21:59:05,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 21:59:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 21:59:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 21:59:05,575 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 15 states. [2018-10-26 21:59:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:05,703 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2018-10-26 21:59:05,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 21:59:05,704 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2018-10-26 21:59:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:05,705 INFO L225 Difference]: With dead ends: 118 [2018-10-26 21:59:05,705 INFO L226 Difference]: Without dead ends: 81 [2018-10-26 21:59:05,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 21:59:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-26 21:59:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-26 21:59:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-26 21:59:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2018-10-26 21:59:05,710 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 77 [2018-10-26 21:59:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:05,710 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2018-10-26 21:59:05,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 21:59:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2018-10-26 21:59:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-26 21:59:05,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:05,712 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:05,712 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:05,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:05,712 INFO L82 PathProgramCache]: Analyzing trace with hash 385347482, now seen corresponding path program 12 times [2018-10-26 21:59:05,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:05,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:05,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:05,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:05,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 406 proven. 273 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-26 21:59:05,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:05,845 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:05,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:05,917 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-26 21:59:05,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:05,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 376 proven. 345 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-26 21:59:06,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:06,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2018-10-26 21:59:06,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 21:59:06,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 21:59:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 21:59:06,210 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 32 states. [2018-10-26 21:59:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:06,472 INFO L93 Difference]: Finished difference Result 140 states and 174 transitions. [2018-10-26 21:59:06,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 21:59:06,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2018-10-26 21:59:06,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:06,474 INFO L225 Difference]: With dead ends: 140 [2018-10-26 21:59:06,474 INFO L226 Difference]: Without dead ends: 103 [2018-10-26 21:59:06,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 21:59:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-26 21:59:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-10-26 21:59:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-26 21:59:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2018-10-26 21:59:06,482 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 80 [2018-10-26 21:59:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:06,482 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2018-10-26 21:59:06,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 21:59:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2018-10-26 21:59:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-26 21:59:06,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:06,486 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 16, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:06,486 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:06,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:06,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1860193439, now seen corresponding path program 13 times [2018-10-26 21:59:06,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:06,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:06,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:06,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:06,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 705 proven. 315 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 21:59:06,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:06,715 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:06,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:06,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 705 proven. 315 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 21:59:06,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:06,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-26 21:59:06,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 21:59:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 21:59:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 21:59:06,810 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 17 states. [2018-10-26 21:59:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:06,979 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2018-10-26 21:59:06,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 21:59:06,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2018-10-26 21:59:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:06,980 INFO L225 Difference]: With dead ends: 160 [2018-10-26 21:59:06,980 INFO L226 Difference]: Without dead ends: 105 [2018-10-26 21:59:06,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 21:59:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-26 21:59:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-26 21:59:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-26 21:59:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2018-10-26 21:59:06,985 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 101 [2018-10-26 21:59:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:06,987 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2018-10-26 21:59:06,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 21:59:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2018-10-26 21:59:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-26 21:59:06,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:06,988 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:06,988 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:06,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1660555610, now seen corresponding path program 14 times [2018-10-26 21:59:06,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:06,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:06,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:06,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:06,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 752 proven. 360 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 21:59:07,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:07,203 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:07,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:59:07,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:07,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:07,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 752 proven. 360 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 21:59:07,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:07,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-26 21:59:07,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 21:59:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 21:59:07,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 21:59:07,302 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand 18 states. [2018-10-26 21:59:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:07,550 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2018-10-26 21:59:07,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 21:59:07,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2018-10-26 21:59:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:07,552 INFO L225 Difference]: With dead ends: 163 [2018-10-26 21:59:07,552 INFO L226 Difference]: Without dead ends: 108 [2018-10-26 21:59:07,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 21:59:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-26 21:59:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-26 21:59:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-26 21:59:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2018-10-26 21:59:07,558 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 104 [2018-10-26 21:59:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:07,558 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2018-10-26 21:59:07,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 21:59:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2018-10-26 21:59:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-26 21:59:07,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:07,559 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:07,560 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:07,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1515270465, now seen corresponding path program 15 times [2018-10-26 21:59:07,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:07,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:07,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:07,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:07,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 799 proven. 408 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-10-26 21:59:07,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:07,801 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:07,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:07,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-26 21:59:07,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:07,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 800 proven. 392 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-10-26 21:59:08,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:08,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-10-26 21:59:08,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 21:59:08,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 21:59:08,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 21:59:08,207 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 36 states. [2018-10-26 21:59:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:08,483 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2018-10-26 21:59:08,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 21:59:08,484 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 107 [2018-10-26 21:59:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:08,485 INFO L225 Difference]: With dead ends: 170 [2018-10-26 21:59:08,485 INFO L226 Difference]: Without dead ends: 115 [2018-10-26 21:59:08,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 21:59:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-26 21:59:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2018-10-26 21:59:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-26 21:59:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2018-10-26 21:59:08,489 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 107 [2018-10-26 21:59:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:08,490 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2018-10-26 21:59:08,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 21:59:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2018-10-26 21:59:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-26 21:59:08,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:08,491 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:08,491 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:08,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash -477895839, now seen corresponding path program 16 times [2018-10-26 21:59:08,492 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:08,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:08,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:08,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:08,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 900 proven. 459 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 21:59:08,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:08,739 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:08,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:08,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:08,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:08,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 900 proven. 459 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 21:59:08,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:08,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-26 21:59:08,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 21:59:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 21:59:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 21:59:08,826 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand 20 states. [2018-10-26 21:59:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:08,902 INFO L93 Difference]: Finished difference Result 175 states and 210 transitions. [2018-10-26 21:59:08,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 21:59:08,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2018-10-26 21:59:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:08,904 INFO L225 Difference]: With dead ends: 175 [2018-10-26 21:59:08,904 INFO L226 Difference]: Without dead ends: 117 [2018-10-26 21:59:08,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 21:59:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-26 21:59:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-26 21:59:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-26 21:59:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2018-10-26 21:59:08,909 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 113 [2018-10-26 21:59:08,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:08,911 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2018-10-26 21:59:08,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 21:59:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2018-10-26 21:59:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-26 21:59:08,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:08,912 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:08,913 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:08,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash 80570268, now seen corresponding path program 17 times [2018-10-26 21:59:08,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:08,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:08,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:08,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:08,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 950 proven. 513 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 21:59:09,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:09,127 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:09,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:09,169 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-26 21:59:09,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:09,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 950 proven. 513 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 21:59:09,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:09,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-26 21:59:09,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 21:59:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 21:59:09,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 21:59:09,218 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand 21 states. [2018-10-26 21:59:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:09,274 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2018-10-26 21:59:09,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 21:59:09,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2018-10-26 21:59:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:09,276 INFO L225 Difference]: With dead ends: 178 [2018-10-26 21:59:09,276 INFO L226 Difference]: Without dead ends: 120 [2018-10-26 21:59:09,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 21:59:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-26 21:59:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-26 21:59:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-26 21:59:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2018-10-26 21:59:09,280 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 116 [2018-10-26 21:59:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:09,280 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2018-10-26 21:59:09,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 21:59:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2018-10-26 21:59:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-26 21:59:09,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:09,281 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 19, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:09,288 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:09,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1358940799, now seen corresponding path program 18 times [2018-10-26 21:59:09,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:09,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:09,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:09,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:09,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 1000 proven. 570 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-10-26 21:59:09,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:09,947 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:09,962 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:10,042 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-10-26 21:59:10,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:10,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 888 proven. 876 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-10-26 21:59:11,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:11,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2018-10-26 21:59:11,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-26 21:59:11,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-26 21:59:11,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 21:59:11,312 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand 47 states. [2018-10-26 21:59:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:11,530 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2018-10-26 21:59:11,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 21:59:11,531 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 119 [2018-10-26 21:59:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:11,532 INFO L225 Difference]: With dead ends: 206 [2018-10-26 21:59:11,532 INFO L226 Difference]: Without dead ends: 148 [2018-10-26 21:59:11,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 21:59:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-26 21:59:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2018-10-26 21:59:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-26 21:59:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2018-10-26 21:59:11,536 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 119 [2018-10-26 21:59:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:11,536 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2018-10-26 21:59:11,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-26 21:59:11,536 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2018-10-26 21:59:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-26 21:59:11,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:11,537 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 25, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:11,537 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:11,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1884050940, now seen corresponding path program 19 times [2018-10-26 21:59:11,538 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:11,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:11,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:11,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:11,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1554 proven. 630 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-26 21:59:11,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:11,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:11,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:11,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 1554 proven. 630 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-26 21:59:11,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:11,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-26 21:59:11,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 21:59:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 21:59:11,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 21:59:11,868 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand 23 states. [2018-10-26 21:59:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:11,914 INFO L93 Difference]: Finished difference Result 232 states and 283 transitions. [2018-10-26 21:59:11,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 21:59:11,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 146 [2018-10-26 21:59:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:11,923 INFO L225 Difference]: With dead ends: 232 [2018-10-26 21:59:11,923 INFO L226 Difference]: Without dead ends: 150 [2018-10-26 21:59:11,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 21:59:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-26 21:59:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-26 21:59:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-26 21:59:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2018-10-26 21:59:11,928 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 146 [2018-10-26 21:59:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:11,928 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2018-10-26 21:59:11,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 21:59:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2018-10-26 21:59:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-26 21:59:11,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:11,932 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 25, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:11,932 INFO L424 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:11,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash -745175775, now seen corresponding path program 20 times [2018-10-26 21:59:11,933 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:11,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:11,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:11,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:11,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 1628 proven. 693 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-26 21:59:12,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:12,182 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:12,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:59:12,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:12,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:12,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 1628 proven. 693 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-26 21:59:12,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:12,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-26 21:59:12,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 21:59:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 21:59:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 21:59:12,294 INFO L87 Difference]: Start difference. First operand 150 states and 175 transitions. Second operand 24 states. [2018-10-26 21:59:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:12,382 INFO L93 Difference]: Finished difference Result 235 states and 286 transitions. [2018-10-26 21:59:12,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 21:59:12,383 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 149 [2018-10-26 21:59:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:12,384 INFO L225 Difference]: With dead ends: 235 [2018-10-26 21:59:12,384 INFO L226 Difference]: Without dead ends: 153 [2018-10-26 21:59:12,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 21:59:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-26 21:59:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-26 21:59:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-26 21:59:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2018-10-26 21:59:12,391 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 149 [2018-10-26 21:59:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:12,391 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2018-10-26 21:59:12,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 21:59:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2018-10-26 21:59:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-26 21:59:12,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:12,392 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 25, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:12,392 INFO L424 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:12,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash -719665188, now seen corresponding path program 21 times [2018-10-26 21:59:12,393 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:12,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:12,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:12,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:12,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1702 proven. 759 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-26 21:59:13,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:13,194 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:13,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:13,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-26 21:59:13,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:13,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 1694 proven. 950 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-10-26 21:59:13,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:13,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28] total 51 [2018-10-26 21:59:13,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-26 21:59:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-26 21:59:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 21:59:13,849 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand 51 states. [2018-10-26 21:59:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:14,146 INFO L93 Difference]: Finished difference Result 242 states and 296 transitions. [2018-10-26 21:59:14,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 21:59:14,147 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 152 [2018-10-26 21:59:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:14,148 INFO L225 Difference]: With dead ends: 242 [2018-10-26 21:59:14,148 INFO L226 Difference]: Without dead ends: 160 [2018-10-26 21:59:14,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 21:59:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-26 21:59:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2018-10-26 21:59:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-26 21:59:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2018-10-26 21:59:14,156 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 152 [2018-10-26 21:59:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:14,156 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2018-10-26 21:59:14,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-26 21:59:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2018-10-26 21:59:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-26 21:59:14,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:14,158 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 26, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:14,158 INFO L424 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:14,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:14,158 INFO L82 PathProgramCache]: Analyzing trace with hash 778511866, now seen corresponding path program 22 times [2018-10-26 21:59:14,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:14,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:14,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:14,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:14,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1848 proven. 828 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:14,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:14,404 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:14,411 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:14,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:14,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:14,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 1848 proven. 828 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:14,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:14,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-26 21:59:14,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 21:59:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 21:59:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 21:59:14,508 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand 26 states. [2018-10-26 21:59:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:14,605 INFO L93 Difference]: Finished difference Result 247 states and 300 transitions. [2018-10-26 21:59:14,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 21:59:14,606 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 158 [2018-10-26 21:59:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:14,606 INFO L225 Difference]: With dead ends: 247 [2018-10-26 21:59:14,606 INFO L226 Difference]: Without dead ends: 162 [2018-10-26 21:59:14,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 21:59:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-26 21:59:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-26 21:59:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-26 21:59:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2018-10-26 21:59:14,611 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 158 [2018-10-26 21:59:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:14,611 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2018-10-26 21:59:14,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 21:59:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2018-10-26 21:59:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-26 21:59:14,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:14,612 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 26, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:14,612 INFO L424 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:14,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1934738847, now seen corresponding path program 23 times [2018-10-26 21:59:14,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:14,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:14,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:14,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:14,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 1925 proven. 900 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:14,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:14,896 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:14,904 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:14,958 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2018-10-26 21:59:14,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:14,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 1925 proven. 900 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:14,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:14,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-26 21:59:14,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-26 21:59:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-26 21:59:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 21:59:14,998 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand 27 states. [2018-10-26 21:59:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:15,374 INFO L93 Difference]: Finished difference Result 250 states and 303 transitions. [2018-10-26 21:59:15,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 21:59:15,375 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 161 [2018-10-26 21:59:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:15,376 INFO L225 Difference]: With dead ends: 250 [2018-10-26 21:59:15,376 INFO L226 Difference]: Without dead ends: 165 [2018-10-26 21:59:15,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 21:59:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-26 21:59:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-26 21:59:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-26 21:59:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2018-10-26 21:59:15,381 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 161 [2018-10-26 21:59:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:15,384 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2018-10-26 21:59:15,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-26 21:59:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2018-10-26 21:59:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-26 21:59:15,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:15,385 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:15,386 INFO L424 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:15,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:15,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1455015898, now seen corresponding path program 24 times [2018-10-26 21:59:15,386 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:15,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:15,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:15,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:15,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 2002 proven. 975 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:16,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:16,755 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:16,763 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:16,813 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-26 21:59:16,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:16,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 2002 proven. 975 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:16,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:16,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-26 21:59:16,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 21:59:16,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 21:59:16,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 21:59:16,869 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand 28 states. [2018-10-26 21:59:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:16,947 INFO L93 Difference]: Finished difference Result 253 states and 306 transitions. [2018-10-26 21:59:16,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 21:59:16,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 164 [2018-10-26 21:59:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:16,948 INFO L225 Difference]: With dead ends: 253 [2018-10-26 21:59:16,948 INFO L226 Difference]: Without dead ends: 168 [2018-10-26 21:59:16,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 21:59:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-26 21:59:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-26 21:59:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-26 21:59:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2018-10-26 21:59:16,952 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 164 [2018-10-26 21:59:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:16,952 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2018-10-26 21:59:16,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 21:59:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2018-10-26 21:59:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-26 21:59:16,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:16,957 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:16,958 INFO L424 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:16,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash -615163969, now seen corresponding path program 25 times [2018-10-26 21:59:16,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:16,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:16,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:16,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:16,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 2079 proven. 1053 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:17,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:17,346 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:17,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:17,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 2079 proven. 1053 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:17,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:17,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-26 21:59:17,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 21:59:17,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 21:59:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 21:59:17,422 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand 29 states. [2018-10-26 21:59:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:17,521 INFO L93 Difference]: Finished difference Result 256 states and 309 transitions. [2018-10-26 21:59:17,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 21:59:17,521 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 167 [2018-10-26 21:59:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:17,522 INFO L225 Difference]: With dead ends: 256 [2018-10-26 21:59:17,522 INFO L226 Difference]: Without dead ends: 171 [2018-10-26 21:59:17,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 21:59:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-26 21:59:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-26 21:59:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-26 21:59:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 197 transitions. [2018-10-26 21:59:17,528 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 197 transitions. Word has length 167 [2018-10-26 21:59:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:17,528 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 197 transitions. [2018-10-26 21:59:17,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 21:59:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 197 transitions. [2018-10-26 21:59:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-26 21:59:17,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:17,529 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:17,529 INFO L424 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:17,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:17,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1908178502, now seen corresponding path program 26 times [2018-10-26 21:59:17,529 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:17,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:17,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:17,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:17,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 2156 proven. 1134 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:18,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:18,612 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:18,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:59:18,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:18,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:18,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 2156 proven. 1134 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:18,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:18,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-26 21:59:18,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 21:59:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 21:59:18,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 21:59:18,682 INFO L87 Difference]: Start difference. First operand 171 states and 197 transitions. Second operand 30 states. [2018-10-26 21:59:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:18,922 INFO L93 Difference]: Finished difference Result 259 states and 312 transitions. [2018-10-26 21:59:18,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 21:59:18,923 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 170 [2018-10-26 21:59:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:18,924 INFO L225 Difference]: With dead ends: 259 [2018-10-26 21:59:18,924 INFO L226 Difference]: Without dead ends: 174 [2018-10-26 21:59:18,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 21:59:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-26 21:59:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-26 21:59:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-26 21:59:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2018-10-26 21:59:18,928 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 170 [2018-10-26 21:59:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:18,928 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2018-10-26 21:59:18,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 21:59:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2018-10-26 21:59:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-26 21:59:18,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:18,933 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 28, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:18,934 INFO L424 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:18,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash -542453281, now seen corresponding path program 27 times [2018-10-26 21:59:18,934 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:18,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:18,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:18,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:18,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 2233 proven. 1218 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-10-26 21:59:19,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:19,442 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:19,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:19,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-26 21:59:19,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:19,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 2240 proven. 1027 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2018-10-26 21:59:20,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:20,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 58 [2018-10-26 21:59:20,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-26 21:59:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-26 21:59:20,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 21:59:20,191 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand 58 states. [2018-10-26 21:59:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:20,502 INFO L93 Difference]: Finished difference Result 266 states and 322 transitions. [2018-10-26 21:59:20,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-26 21:59:20,503 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 173 [2018-10-26 21:59:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:20,504 INFO L225 Difference]: With dead ends: 266 [2018-10-26 21:59:20,504 INFO L226 Difference]: Without dead ends: 181 [2018-10-26 21:59:20,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-26 21:59:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-26 21:59:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2018-10-26 21:59:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-26 21:59:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2018-10-26 21:59:20,512 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 173 [2018-10-26 21:59:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:20,513 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2018-10-26 21:59:20,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-26 21:59:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2018-10-26 21:59:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-26 21:59:20,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:20,514 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 29, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:20,514 INFO L424 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:20,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1427967745, now seen corresponding path program 28 times [2018-10-26 21:59:20,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:20,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:20,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:20,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:20,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 2400 proven. 1305 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:21,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:21,165 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:21,172 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:21,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:21,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:21,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 2400 proven. 1305 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:21,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:21,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-26 21:59:21,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 21:59:21,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 21:59:21,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 21:59:21,298 INFO L87 Difference]: Start difference. First operand 180 states and 207 transitions. Second operand 32 states. [2018-10-26 21:59:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:21,791 INFO L93 Difference]: Finished difference Result 271 states and 326 transitions. [2018-10-26 21:59:21,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 21:59:21,792 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2018-10-26 21:59:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:21,793 INFO L225 Difference]: With dead ends: 271 [2018-10-26 21:59:21,793 INFO L226 Difference]: Without dead ends: 183 [2018-10-26 21:59:21,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 21:59:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-26 21:59:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-26 21:59:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-26 21:59:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2018-10-26 21:59:21,801 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 179 [2018-10-26 21:59:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:21,802 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2018-10-26 21:59:21,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 21:59:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2018-10-26 21:59:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-26 21:59:21,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:21,803 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 30, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:21,807 INFO L424 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:21,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash -376629124, now seen corresponding path program 29 times [2018-10-26 21:59:21,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:21,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:21,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:21,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:21,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 2480 proven. 1395 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:22,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:22,334 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:22,340 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:22,394 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-10-26 21:59:22,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:22,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 2480 proven. 1395 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:22,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:22,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-26 21:59:22,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 21:59:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 21:59:22,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 21:59:22,455 INFO L87 Difference]: Start difference. First operand 183 states and 210 transitions. Second operand 33 states. [2018-10-26 21:59:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:22,598 INFO L93 Difference]: Finished difference Result 274 states and 329 transitions. [2018-10-26 21:59:22,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 21:59:22,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 182 [2018-10-26 21:59:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:22,600 INFO L225 Difference]: With dead ends: 274 [2018-10-26 21:59:22,600 INFO L226 Difference]: Without dead ends: 186 [2018-10-26 21:59:22,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 21:59:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-26 21:59:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-26 21:59:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-26 21:59:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 213 transitions. [2018-10-26 21:59:22,605 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 213 transitions. Word has length 182 [2018-10-26 21:59:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:22,608 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 213 transitions. [2018-10-26 21:59:22,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 21:59:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 213 transitions. [2018-10-26 21:59:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-26 21:59:22,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:22,609 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:22,609 INFO L424 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:22,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1016309471, now seen corresponding path program 30 times [2018-10-26 21:59:22,610 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:22,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:22,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 2560 proven. 1488 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:23,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:23,053 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:23,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:23,125 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-10-26 21:59:23,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:23,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 2560 proven. 1488 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:23,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:23,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-26 21:59:23,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 21:59:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 21:59:23,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 21:59:23,183 INFO L87 Difference]: Start difference. First operand 186 states and 213 transitions. Second operand 34 states. [2018-10-26 21:59:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:23,274 INFO L93 Difference]: Finished difference Result 277 states and 332 transitions. [2018-10-26 21:59:23,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 21:59:23,274 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 185 [2018-10-26 21:59:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:23,275 INFO L225 Difference]: With dead ends: 277 [2018-10-26 21:59:23,275 INFO L226 Difference]: Without dead ends: 189 [2018-10-26 21:59:23,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 21:59:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-26 21:59:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-26 21:59:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-26 21:59:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 216 transitions. [2018-10-26 21:59:23,279 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 216 transitions. Word has length 185 [2018-10-26 21:59:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:23,280 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 216 transitions. [2018-10-26 21:59:23,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 21:59:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 216 transitions. [2018-10-26 21:59:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-26 21:59:23,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:23,280 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 32, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:23,281 INFO L424 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:23,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash -963634596, now seen corresponding path program 31 times [2018-10-26 21:59:23,282 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:23,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:23,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:23,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:23,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 2640 proven. 1584 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:23,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:23,743 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:23,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:23,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 2640 proven. 1584 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:23,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:23,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-26 21:59:23,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 21:59:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 21:59:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 21:59:23,833 INFO L87 Difference]: Start difference. First operand 189 states and 216 transitions. Second operand 35 states. [2018-10-26 21:59:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:25,180 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2018-10-26 21:59:25,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 21:59:25,180 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 188 [2018-10-26 21:59:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:25,181 INFO L225 Difference]: With dead ends: 280 [2018-10-26 21:59:25,181 INFO L226 Difference]: Without dead ends: 192 [2018-10-26 21:59:25,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 21:59:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-26 21:59:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-26 21:59:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-26 21:59:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 219 transitions. [2018-10-26 21:59:25,189 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 219 transitions. Word has length 188 [2018-10-26 21:59:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:25,189 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 219 transitions. [2018-10-26 21:59:25,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 21:59:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 219 transitions. [2018-10-26 21:59:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-26 21:59:25,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:25,190 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 33, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:25,190 INFO L424 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:25,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:25,191 INFO L82 PathProgramCache]: Analyzing trace with hash 610503489, now seen corresponding path program 32 times [2018-10-26 21:59:25,191 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:25,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:25,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:25,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:25,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2720 proven. 1683 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:25,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:25,599 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:25,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:59:25,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:25,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:25,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 2720 proven. 1683 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:25,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:25,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-26 21:59:25,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 21:59:25,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 21:59:25,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 21:59:25,706 INFO L87 Difference]: Start difference. First operand 192 states and 219 transitions. Second operand 36 states. [2018-10-26 21:59:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:25,785 INFO L93 Difference]: Finished difference Result 283 states and 338 transitions. [2018-10-26 21:59:25,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 21:59:25,785 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2018-10-26 21:59:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:25,786 INFO L225 Difference]: With dead ends: 283 [2018-10-26 21:59:25,786 INFO L226 Difference]: Without dead ends: 195 [2018-10-26 21:59:25,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 21:59:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-26 21:59:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-26 21:59:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-26 21:59:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2018-10-26 21:59:25,790 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 191 [2018-10-26 21:59:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:25,790 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2018-10-26 21:59:25,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 21:59:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2018-10-26 21:59:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-26 21:59:25,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:25,791 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 34, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:25,792 INFO L424 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:25,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash -989711300, now seen corresponding path program 33 times [2018-10-26 21:59:25,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:25,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:25,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:25,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:25,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2800 proven. 1785 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2018-10-26 21:59:26,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:26,247 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:26,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:26,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-26 21:59:26,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:26,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 2822 proven. 1107 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2018-10-26 21:59:27,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:27,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 30] total 65 [2018-10-26 21:59:27,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-26 21:59:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-26 21:59:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 21:59:27,032 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand 65 states. [2018-10-26 21:59:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:27,370 INFO L93 Difference]: Finished difference Result 290 states and 348 transitions. [2018-10-26 21:59:27,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-26 21:59:27,371 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 194 [2018-10-26 21:59:27,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:27,372 INFO L225 Difference]: With dead ends: 290 [2018-10-26 21:59:27,372 INFO L226 Difference]: Without dead ends: 202 [2018-10-26 21:59:27,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 21:59:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-26 21:59:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-10-26 21:59:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-26 21:59:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 229 transitions. [2018-10-26 21:59:27,379 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 229 transitions. Word has length 194 [2018-10-26 21:59:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:27,379 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 229 transitions. [2018-10-26 21:59:27,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-26 21:59:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 229 transitions. [2018-10-26 21:59:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-26 21:59:27,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:27,381 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 35, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:27,381 INFO L424 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:27,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash 803705818, now seen corresponding path program 34 times [2018-10-26 21:59:27,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:27,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:27,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:27,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:27,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2988 proven. 1890 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-26 21:59:29,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:29,974 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:29,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:30,010 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:30,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:30,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 2988 proven. 1890 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-26 21:59:30,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:30,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-26 21:59:30,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 21:59:30,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 21:59:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 21:59:30,065 INFO L87 Difference]: Start difference. First operand 201 states and 229 transitions. Second operand 38 states. [2018-10-26 21:59:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:30,232 INFO L93 Difference]: Finished difference Result 295 states and 352 transitions. [2018-10-26 21:59:30,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 21:59:30,233 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 200 [2018-10-26 21:59:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:30,234 INFO L225 Difference]: With dead ends: 295 [2018-10-26 21:59:30,234 INFO L226 Difference]: Without dead ends: 204 [2018-10-26 21:59:30,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 21:59:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-26 21:59:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-10-26 21:59:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-26 21:59:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 232 transitions. [2018-10-26 21:59:30,238 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 232 transitions. Word has length 200 [2018-10-26 21:59:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:30,238 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 232 transitions. [2018-10-26 21:59:30,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 21:59:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 232 transitions. [2018-10-26 21:59:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-26 21:59:30,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:30,239 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 36, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:30,240 INFO L424 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:30,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:30,240 INFO L82 PathProgramCache]: Analyzing trace with hash 390583615, now seen corresponding path program 35 times [2018-10-26 21:59:30,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:30,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:30,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:30,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:30,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 3071 proven. 1998 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-26 21:59:33,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:33,376 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:33,383 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:33,443 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2018-10-26 21:59:33,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:33,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 3071 proven. 1998 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-26 21:59:33,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:33,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-26 21:59:33,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 21:59:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 21:59:33,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 21:59:33,486 INFO L87 Difference]: Start difference. First operand 204 states and 232 transitions. Second operand 39 states. [2018-10-26 21:59:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:33,573 INFO L93 Difference]: Finished difference Result 298 states and 355 transitions. [2018-10-26 21:59:33,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 21:59:33,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-10-26 21:59:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:33,575 INFO L225 Difference]: With dead ends: 298 [2018-10-26 21:59:33,575 INFO L226 Difference]: Without dead ends: 207 [2018-10-26 21:59:33,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 21:59:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-26 21:59:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-26 21:59:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-26 21:59:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2018-10-26 21:59:33,580 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 203 [2018-10-26 21:59:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:33,580 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2018-10-26 21:59:33,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 21:59:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2018-10-26 21:59:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-26 21:59:33,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:33,581 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 37, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:33,581 INFO L424 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:33,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1851662918, now seen corresponding path program 36 times [2018-10-26 21:59:33,582 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:33,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:33,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:33,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:33,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 3154 proven. 2109 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-10-26 21:59:34,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:34,816 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:34,822 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:34,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 65 check-sat command(s) [2018-10-26 21:59:34,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:34,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 2882 proven. 2795 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2018-10-26 21:59:36,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:36,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 46] total 84 [2018-10-26 21:59:36,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-26 21:59:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-26 21:59:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-26 21:59:36,350 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand 84 states. [2018-10-26 21:59:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:36,704 INFO L93 Difference]: Finished difference Result 350 states and 440 transitions. [2018-10-26 21:59:36,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-26 21:59:36,705 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 206 [2018-10-26 21:59:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:36,706 INFO L225 Difference]: With dead ends: 350 [2018-10-26 21:59:36,706 INFO L226 Difference]: Without dead ends: 259 [2018-10-26 21:59:36,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-26 21:59:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-26 21:59:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2018-10-26 21:59:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-10-26 21:59:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 302 transitions. [2018-10-26 21:59:36,714 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 302 transitions. Word has length 206 [2018-10-26 21:59:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:36,715 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 302 transitions. [2018-10-26 21:59:36,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-26 21:59:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 302 transitions. [2018-10-26 21:59:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-26 21:59:36,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:36,716 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 44, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:36,716 INFO L424 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:36,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash -642861473, now seen corresponding path program 37 times [2018-10-26 21:59:36,716 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:36,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:36,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:36,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:36,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 5109 proven. 2223 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2018-10-26 21:59:37,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:37,409 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:37,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:37,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 5109 proven. 2223 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2018-10-26 21:59:37,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:37,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-26 21:59:37,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 21:59:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 21:59:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 21:59:37,526 INFO L87 Difference]: Start difference. First operand 258 states and 302 transitions. Second operand 41 states. [2018-10-26 21:59:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:37,666 INFO L93 Difference]: Finished difference Result 400 states and 489 transitions. [2018-10-26 21:59:37,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 21:59:37,667 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 257 [2018-10-26 21:59:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:37,668 INFO L225 Difference]: With dead ends: 400 [2018-10-26 21:59:37,668 INFO L226 Difference]: Without dead ends: 261 [2018-10-26 21:59:37,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 21:59:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-26 21:59:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-10-26 21:59:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-26 21:59:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 305 transitions. [2018-10-26 21:59:37,674 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 305 transitions. Word has length 257 [2018-10-26 21:59:37,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:37,674 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 305 transitions. [2018-10-26 21:59:37,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 21:59:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 305 transitions. [2018-10-26 21:59:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-26 21:59:37,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:37,676 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 44, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:37,676 INFO L424 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:37,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:37,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1253553306, now seen corresponding path program 38 times [2018-10-26 21:59:37,676 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:37,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:37,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:37,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:37,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 5240 proven. 2340 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2018-10-26 21:59:38,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:38,791 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:38,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:59:38,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:38,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:38,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 5240 proven. 2340 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2018-10-26 21:59:38,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:38,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-26 21:59:38,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 21:59:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 21:59:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 21:59:38,914 INFO L87 Difference]: Start difference. First operand 261 states and 305 transitions. Second operand 42 states. [2018-10-26 21:59:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:39,228 INFO L93 Difference]: Finished difference Result 403 states and 492 transitions. [2018-10-26 21:59:39,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 21:59:39,229 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 260 [2018-10-26 21:59:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:39,230 INFO L225 Difference]: With dead ends: 403 [2018-10-26 21:59:39,230 INFO L226 Difference]: Without dead ends: 264 [2018-10-26 21:59:39,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 21:59:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-26 21:59:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-10-26 21:59:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-26 21:59:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 308 transitions. [2018-10-26 21:59:39,235 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 308 transitions. Word has length 260 [2018-10-26 21:59:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:39,236 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 308 transitions. [2018-10-26 21:59:39,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 21:59:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 308 transitions. [2018-10-26 21:59:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-26 21:59:39,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:39,237 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 44, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:39,237 INFO L424 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:39,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1346422911, now seen corresponding path program 39 times [2018-10-26 21:59:39,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:39,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:39,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:39,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:39,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 5371 proven. 2460 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2018-10-26 21:59:39,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:39,801 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:39,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:39,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2018-10-26 21:59:39,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:39,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 5360 proven. 2926 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2018-10-26 21:59:41,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:41,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 47] total 88 [2018-10-26 21:59:41,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-26 21:59:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-26 21:59:41,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 21:59:41,406 INFO L87 Difference]: Start difference. First operand 264 states and 308 transitions. Second operand 88 states. [2018-10-26 21:59:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:41,854 INFO L93 Difference]: Finished difference Result 410 states and 502 transitions. [2018-10-26 21:59:41,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-26 21:59:41,855 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 263 [2018-10-26 21:59:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:41,856 INFO L225 Difference]: With dead ends: 410 [2018-10-26 21:59:41,856 INFO L226 Difference]: Without dead ends: 271 [2018-10-26 21:59:41,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-26 21:59:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-26 21:59:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2018-10-26 21:59:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-10-26 21:59:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 315 transitions. [2018-10-26 21:59:41,861 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 315 transitions. Word has length 263 [2018-10-26 21:59:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:41,865 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 315 transitions. [2018-10-26 21:59:41,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-26 21:59:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 315 transitions. [2018-10-26 21:59:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-10-26 21:59:41,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:41,867 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:41,867 INFO L424 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:41,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:41,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1941178401, now seen corresponding path program 40 times [2018-10-26 21:59:41,867 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:41,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:41,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:41,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:41,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 5628 proven. 2583 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:42,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:42,470 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:42,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:42,557 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:42,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:42,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 5628 proven. 2583 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:42,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:42,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-26 21:59:42,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 21:59:42,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 21:59:42,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 21:59:42,639 INFO L87 Difference]: Start difference. First operand 270 states and 315 transitions. Second operand 44 states. [2018-10-26 21:59:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:42,917 INFO L93 Difference]: Finished difference Result 415 states and 506 transitions. [2018-10-26 21:59:42,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 21:59:42,918 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 269 [2018-10-26 21:59:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:42,919 INFO L225 Difference]: With dead ends: 415 [2018-10-26 21:59:42,919 INFO L226 Difference]: Without dead ends: 273 [2018-10-26 21:59:42,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 21:59:42,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-26 21:59:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-10-26 21:59:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-10-26 21:59:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 318 transitions. [2018-10-26 21:59:42,925 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 318 transitions. Word has length 269 [2018-10-26 21:59:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:42,925 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 318 transitions. [2018-10-26 21:59:42,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 21:59:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 318 transitions. [2018-10-26 21:59:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-26 21:59:42,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:42,927 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 45, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:42,927 INFO L424 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:42,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1855814180, now seen corresponding path program 41 times [2018-10-26 21:59:42,927 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:42,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:42,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:42,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:42,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 5762 proven. 2709 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:43,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:43,584 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:43,590 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:43,697 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 88 check-sat command(s) [2018-10-26 21:59:43,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:43,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 5762 proven. 2709 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:43,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:43,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-26 21:59:43,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 21:59:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 21:59:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 21:59:43,776 INFO L87 Difference]: Start difference. First operand 273 states and 318 transitions. Second operand 45 states. [2018-10-26 21:59:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:44,001 INFO L93 Difference]: Finished difference Result 418 states and 509 transitions. [2018-10-26 21:59:44,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-26 21:59:44,002 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 272 [2018-10-26 21:59:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:44,003 INFO L225 Difference]: With dead ends: 418 [2018-10-26 21:59:44,003 INFO L226 Difference]: Without dead ends: 276 [2018-10-26 21:59:44,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 21:59:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-26 21:59:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-10-26 21:59:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-10-26 21:59:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 321 transitions. [2018-10-26 21:59:44,008 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 321 transitions. Word has length 272 [2018-10-26 21:59:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:44,008 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 321 transitions. [2018-10-26 21:59:44,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 21:59:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 321 transitions. [2018-10-26 21:59:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-26 21:59:44,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:44,014 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 45, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:44,014 INFO L424 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:44,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:44,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1508119999, now seen corresponding path program 42 times [2018-10-26 21:59:44,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:44,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:44,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:44,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:44,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 5896 proven. 2838 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:44,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:44,747 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:44,754 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:44,850 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2018-10-26 21:59:44,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:44,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 5896 proven. 2838 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:44,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:44,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-26 21:59:44,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-26 21:59:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-26 21:59:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 21:59:44,927 INFO L87 Difference]: Start difference. First operand 276 states and 321 transitions. Second operand 46 states. [2018-10-26 21:59:45,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:45,659 INFO L93 Difference]: Finished difference Result 421 states and 512 transitions. [2018-10-26 21:59:45,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-26 21:59:45,660 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 275 [2018-10-26 21:59:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:45,661 INFO L225 Difference]: With dead ends: 421 [2018-10-26 21:59:45,661 INFO L226 Difference]: Without dead ends: 279 [2018-10-26 21:59:45,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-26 21:59:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-26 21:59:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-26 21:59:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-26 21:59:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 324 transitions. [2018-10-26 21:59:45,665 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 324 transitions. Word has length 275 [2018-10-26 21:59:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:45,668 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 324 transitions. [2018-10-26 21:59:45,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-26 21:59:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 324 transitions. [2018-10-26 21:59:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-26 21:59:45,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:45,670 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:45,670 INFO L424 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:45,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:45,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1483075516, now seen corresponding path program 43 times [2018-10-26 21:59:45,670 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:45,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:45,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:45,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:45,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 6030 proven. 2970 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:46,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:46,437 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:46,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:46,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 6030 proven. 2970 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:46,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:46,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-26 21:59:46,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-26 21:59:46,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-26 21:59:46,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 21:59:46,558 INFO L87 Difference]: Start difference. First operand 279 states and 324 transitions. Second operand 47 states. [2018-10-26 21:59:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:46,747 INFO L93 Difference]: Finished difference Result 424 states and 515 transitions. [2018-10-26 21:59:46,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-26 21:59:46,749 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 278 [2018-10-26 21:59:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:46,750 INFO L225 Difference]: With dead ends: 424 [2018-10-26 21:59:46,750 INFO L226 Difference]: Without dead ends: 282 [2018-10-26 21:59:46,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-26 21:59:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-26 21:59:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2018-10-26 21:59:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-10-26 21:59:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 327 transitions. [2018-10-26 21:59:46,755 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 327 transitions. Word has length 278 [2018-10-26 21:59:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:46,755 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 327 transitions. [2018-10-26 21:59:46,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-26 21:59:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 327 transitions. [2018-10-26 21:59:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-10-26 21:59:46,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:46,757 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:46,757 INFO L424 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:46,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash 207205473, now seen corresponding path program 44 times [2018-10-26 21:59:46,764 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:46,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:46,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:59:46,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 6164 proven. 3105 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:47,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:47,548 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:47,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:59:47,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:59:47,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:47,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 6164 proven. 3105 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:47,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:47,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-26 21:59:47,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-26 21:59:47,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-26 21:59:47,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 21:59:47,678 INFO L87 Difference]: Start difference. First operand 282 states and 327 transitions. Second operand 48 states. [2018-10-26 21:59:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:47,892 INFO L93 Difference]: Finished difference Result 427 states and 518 transitions. [2018-10-26 21:59:47,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-26 21:59:47,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 281 [2018-10-26 21:59:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:47,894 INFO L225 Difference]: With dead ends: 427 [2018-10-26 21:59:47,894 INFO L226 Difference]: Without dead ends: 285 [2018-10-26 21:59:47,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-26 21:59:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-26 21:59:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-10-26 21:59:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-10-26 21:59:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 330 transitions. [2018-10-26 21:59:47,900 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 330 transitions. Word has length 281 [2018-10-26 21:59:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:47,900 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 330 transitions. [2018-10-26 21:59:47,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-26 21:59:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 330 transitions. [2018-10-26 21:59:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-10-26 21:59:47,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:47,901 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:47,901 INFO L424 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:47,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:47,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1223324060, now seen corresponding path program 45 times [2018-10-26 21:59:47,902 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:47,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:47,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:47,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:47,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 6298 proven. 3243 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2018-10-26 21:59:48,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:48,683 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:48,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:59:48,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-10-26 21:59:48,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:48,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 6302 proven. 3060 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2018-10-26 21:59:50,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:50,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 95 [2018-10-26 21:59:50,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-26 21:59:50,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-26 21:59:50,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-26 21:59:50,444 INFO L87 Difference]: Start difference. First operand 285 states and 330 transitions. Second operand 95 states. [2018-10-26 21:59:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:51,009 INFO L93 Difference]: Finished difference Result 434 states and 528 transitions. [2018-10-26 21:59:51,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-26 21:59:51,010 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 284 [2018-10-26 21:59:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:51,011 INFO L225 Difference]: With dead ends: 434 [2018-10-26 21:59:51,011 INFO L226 Difference]: Without dead ends: 292 [2018-10-26 21:59:51,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-26 21:59:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-26 21:59:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2018-10-26 21:59:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-26 21:59:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 337 transitions. [2018-10-26 21:59:51,017 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 337 transitions. Word has length 284 [2018-10-26 21:59:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:51,018 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 337 transitions. [2018-10-26 21:59:51,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-26 21:59:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 337 transitions. [2018-10-26 21:59:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-26 21:59:51,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:51,019 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:51,019 INFO L424 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:51,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:51,019 INFO L82 PathProgramCache]: Analyzing trace with hash -209207622, now seen corresponding path program 46 times [2018-10-26 21:59:51,019 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:51,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:51,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:51,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:51,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 6576 proven. 3384 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2018-10-26 21:59:51,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:51,720 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:51,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:59:51,763 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:59:51,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:51,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 6576 proven. 3384 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2018-10-26 21:59:51,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:51,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-26 21:59:51,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-26 21:59:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-26 21:59:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 21:59:51,815 INFO L87 Difference]: Start difference. First operand 291 states and 337 transitions. Second operand 50 states. [2018-10-26 21:59:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:53,098 INFO L93 Difference]: Finished difference Result 439 states and 532 transitions. [2018-10-26 21:59:53,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-26 21:59:53,099 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 290 [2018-10-26 21:59:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:53,100 INFO L225 Difference]: With dead ends: 439 [2018-10-26 21:59:53,100 INFO L226 Difference]: Without dead ends: 294 [2018-10-26 21:59:53,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 21:59:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-26 21:59:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2018-10-26 21:59:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-26 21:59:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 340 transitions. [2018-10-26 21:59:53,110 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 340 transitions. Word has length 290 [2018-10-26 21:59:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:53,110 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 340 transitions. [2018-10-26 21:59:53,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-26 21:59:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 340 transitions. [2018-10-26 21:59:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-26 21:59:53,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:53,112 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 48, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:53,112 INFO L424 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:53,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1583920095, now seen corresponding path program 47 times [2018-10-26 21:59:53,112 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:53,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:53,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:53,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:53,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 6713 proven. 3528 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2018-10-26 21:59:54,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:54,478 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:54,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 21:59:54,601 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2018-10-26 21:59:54,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:54,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 6713 proven. 3528 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2018-10-26 21:59:54,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:54,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-26 21:59:54,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-26 21:59:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-26 21:59:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 21:59:54,661 INFO L87 Difference]: Start difference. First operand 294 states and 340 transitions. Second operand 51 states. [2018-10-26 21:59:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:54,742 INFO L93 Difference]: Finished difference Result 442 states and 535 transitions. [2018-10-26 21:59:54,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-26 21:59:54,743 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 293 [2018-10-26 21:59:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:54,744 INFO L225 Difference]: With dead ends: 442 [2018-10-26 21:59:54,745 INFO L226 Difference]: Without dead ends: 297 [2018-10-26 21:59:54,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-26 21:59:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-26 21:59:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-10-26 21:59:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-10-26 21:59:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 343 transitions. [2018-10-26 21:59:54,750 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 343 transitions. Word has length 293 [2018-10-26 21:59:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:54,751 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 343 transitions. [2018-10-26 21:59:54,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-26 21:59:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 343 transitions. [2018-10-26 21:59:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-10-26 21:59:54,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:54,752 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 49, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:54,752 INFO L424 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:54,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash -151490406, now seen corresponding path program 48 times [2018-10-26 21:59:54,753 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:54,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:54,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:54,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:54,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:59:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 6850 proven. 3675 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2018-10-26 21:59:55,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:59:55,603 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/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 [2018-10-26 21:59:55,609 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 21:59:55,804 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2018-10-26 21:59:55,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:59:55,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:59:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 6854 proven. 3626 refuted. 0 times theorem prover too weak. 3105 trivial. 0 not checked. [2018-10-26 21:59:57,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:59:57,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2018-10-26 21:59:57,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-26 21:59:57,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-26 21:59:57,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-26 21:59:57,840 INFO L87 Difference]: Start difference. First operand 297 states and 343 transitions. Second operand 102 states. [2018-10-26 21:59:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:59:58,502 INFO L93 Difference]: Finished difference Result 457 states and 558 transitions. [2018-10-26 21:59:58,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-26 21:59:58,503 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 296 [2018-10-26 21:59:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:59:58,504 INFO L225 Difference]: With dead ends: 457 [2018-10-26 21:59:58,505 INFO L226 Difference]: Without dead ends: 312 [2018-10-26 21:59:58,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-26 21:59:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-10-26 21:59:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2018-10-26 21:59:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2018-10-26 21:59:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 362 transitions. [2018-10-26 21:59:58,510 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 362 transitions. Word has length 296 [2018-10-26 21:59:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:59:58,510 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 362 transitions. [2018-10-26 21:59:58,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-26 21:59:58,510 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 362 transitions. [2018-10-26 21:59:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-26 21:59:58,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:59:58,512 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:59:58,512 INFO L424 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:59:58,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:59:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1819528257, now seen corresponding path program 49 times [2018-10-26 21:59:58,512 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 21:59:58,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 21:59:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:58,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:59:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:59:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:00:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-26 22:00:00,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:00:00,051 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:00:00,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:00:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:00:00,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:00:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 11225 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-26 22:00:00,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:00:00,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-26 22:00:00,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-26 22:00:00,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-26 22:00:00,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-26 22:00:00,343 INFO L87 Difference]: Start difference. First operand 312 states and 362 transitions. Second operand 55 states. [2018-10-26 22:00:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:00:01,955 INFO L93 Difference]: Finished difference Result 4294 states and 5669 transitions. [2018-10-26 22:00:01,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-26 22:00:01,957 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 311 [2018-10-26 22:00:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:00:01,963 INFO L225 Difference]: With dead ends: 4294 [2018-10-26 22:00:01,963 INFO L226 Difference]: Without dead ends: 4289 [2018-10-26 22:00:01,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 309 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-10-26 22:00:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2018-10-26 22:00:02,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 315. [2018-10-26 22:00:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-26 22:00:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 366 transitions. [2018-10-26 22:00:02,036 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 366 transitions. Word has length 311 [2018-10-26 22:00:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:00:02,037 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 366 transitions. [2018-10-26 22:00:02,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-26 22:00:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 366 transitions. [2018-10-26 22:00:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-26 22:00:02,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:00:02,043 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:00:02,043 INFO L424 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:00:02,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:00:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 908591292, now seen corresponding path program 50 times [2018-10-26 22:00:02,043 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:00:02,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:00:02,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:00:02,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:00:02,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:00:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:00:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 11527 proven. 0 refuted. 0 times theorem prover too weak. 3825 trivial. 0 not checked. [2018-10-26 22:00:03,544 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:00:03,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-10-26 22:00:03,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-26 22:00:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-26 22:00:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:00:03,548 INFO L87 Difference]: Start difference. First operand 315 states and 366 transitions. Second operand 52 states. [2018-10-26 22:00:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:00:04,317 INFO L93 Difference]: Finished difference Result 464 states and 564 transitions. [2018-10-26 22:00:04,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-26 22:00:04,317 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 314 [2018-10-26 22:00:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:00:04,318 INFO L225 Difference]: With dead ends: 464 [2018-10-26 22:00:04,318 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 22:00:04,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 22:00:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 22:00:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 22:00:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 22:00:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 22:00:04,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 314 [2018-10-26 22:00:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:00:04,319 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 22:00:04,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-26 22:00:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 22:00:04,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 22:00:04,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 22:00:04,993 WARN L179 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 413 [2018-10-26 22:00:07,387 WARN L179 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 413 DAG size of output: 357 [2018-10-26 22:00:07,394 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:00:07,395 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 22:00:07,395 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 22:00:07,395 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 23) no Hoare annotation was computed. [2018-10-26 22:00:07,395 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 20) no Hoare annotation was computed. [2018-10-26 22:00:07,396 INFO L421 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))) [2018-10-26 22:00:07,397 INFO L421 ceAbstractionStarter]: At program point L13-3(lines 13 20) the Hoare annotation is: (and (<= main_~y~0 100) (< 99 main_~y~0)) [2018-10-26 22:00:07,397 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-26 22:00:07,397 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-26 22:00:07,397 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-26 22:00:07,400 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-26 22:00:07,400 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-26 22:00:07,400 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-26 22:00:07,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:00:07 BoogieIcfgContainer [2018-10-26 22:00:07,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:00:07,443 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 22:00:07,443 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 22:00:07,443 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 22:00:07,444 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:59:00" (3/4) ... [2018-10-26 22:00:07,448 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 22:00:07,459 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 22:00:07,460 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 22:00:07,460 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-26 22:00:07,466 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-10-26 22:00:07,466 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-26 22:00:07,466 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 22:00:07,525 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2f0daedb-6c90-410b-b7f0-a4db6dc9cfa9/bin-2019/uautomizer/witness.graphml [2018-10-26 22:00:07,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 22:00:07,526 INFO L168 Benchmark]: Toolchain (without parser) took 67353.98 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 461.4 MB). Free memory was 960.7 MB in the beginning and 928.9 MB in the end (delta: 31.8 MB). Peak memory consumption was 493.2 MB. Max. memory is 11.5 GB. [2018-10-26 22:00:07,527 INFO L168 Benchmark]: CDTParser took 0.48 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. [2018-10-26 22:00:07,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.74 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 948.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-10-26 22:00:07,528 INFO L168 Benchmark]: Boogie Preprocessor took 23.99 ms. Allocated memory is still 1.0 GB. Free memory is still 948.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:00:07,528 INFO L168 Benchmark]: RCFGBuilder took 346.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -192.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. [2018-10-26 22:00:07,528 INFO L168 Benchmark]: TraceAbstraction took 66726.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 313.5 MB). Free memory was 1.1 GB in the beginning and 941.0 MB in the end (delta: 197.2 MB). Peak memory consumption was 510.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:00:07,528 INFO L168 Benchmark]: Witness Printer took 82.69 ms. Allocated memory is still 1.5 GB. Free memory was 941.0 MB in the beginning and 928.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-26 22:00:07,539 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 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 167.74 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 948.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.99 ms. Allocated memory is still 1.0 GB. Free memory is still 948.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 346.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -192.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 66726.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 313.5 MB). Free memory was 1.1 GB in the beginning and 941.0 MB in the end (delta: 197.2 MB). Peak memory consumption was 510.7 MB. Max. memory is 11.5 GB. * Witness Printer took 82.69 ms. Allocated memory is still 1.5 GB. Free memory was 941.0 MB in the beginning and 928.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 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, 20 locations, 1 error locations. SAFE Result, 66.6s OverallTime, 53 OverallIterations, 102 TraceHistogramMax, 15.0s AutomataDifference, 0.0s DeadEndRemovalTime, 3.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 827 SDtfs, 752 SDslu, 16750 SDs, 0 SdLazy, 8111 SolverSat, 2025 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9542 GetRequests, 7807 SyntacticMatches, 3 SemanticMatches, 1732 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=315occurred in iteration=52, 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: 0.3s AutomataMinimizationTime, 53 MinimizatonAttempts, 3988 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 59 PreInvPairs, 161 NumberOfFragments, 720 HoareAnnotationTreeSize, 59 FomulaSimplifications, 13374 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 7 FomulaSimplificationsInter, 220 FormulaSimplificationTreeSizeReductionInter, 2.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 42.3s InterpolantComputationTime, 16549 NumberOfCodeBlocks, 16234 NumberOfCodeBlocksAsserted, 1258 NumberOfCheckSat, 16446 ConstructedInterpolants, 0 QuantifiedInterpolants, 7794722 SizeOfPredicates, 17 NumberOfNonLiveVariables, 15800 ConjunctsInSsa, 1455 ConjunctsInUnsatCore, 103 InterpolantComputations, 4 PerfectInterpolantSequences, 376172/524142 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...