./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/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 f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 23:36:31,036 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 23:36:31,037 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 23:36:31,043 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 23:36:31,043 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 23:36:31,044 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 23:36:31,044 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 23:36:31,045 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 23:36:31,046 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 23:36:31,047 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 23:36:31,047 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 23:36:31,048 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 23:36:31,048 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 23:36:31,049 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 23:36:31,050 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 23:36:31,050 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 23:36:31,051 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 23:36:31,052 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 23:36:31,053 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 23:36:31,054 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 23:36:31,054 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 23:36:31,055 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 23:36:31,057 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 23:36:31,057 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 23:36:31,057 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 23:36:31,058 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 23:36:31,058 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 23:36:31,059 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 23:36:31,059 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 23:36:31,060 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 23:36:31,060 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 23:36:31,060 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 23:36:31,060 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 23:36:31,060 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 23:36:31,061 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 23:36:31,061 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 23:36:31,062 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-22 23:36:31,069 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 23:36:31,069 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 23:36:31,070 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 23:36:31,070 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 23:36:31,070 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 23:36:31,070 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 23:36:31,070 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 23:36:31,071 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 23:36:31,071 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 23:36:31,071 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 23:36:31,071 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 23:36:31,071 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 23:36:31,071 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 23:36:31,071 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 23:36:31,072 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 23:36:31,072 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 23:36:31,072 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 23:36:31,072 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 23:36:31,072 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 23:36:31,072 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 23:36:31,072 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 23:36:31,072 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 23:36:31,073 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 23:36:31,073 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 23:36:31,073 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 23:36:31,073 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 23:36:31,073 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 23:36:31,073 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 23:36:31,073 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 23:36:31,074 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 23:36:31,074 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_a3879839-972d-4007-859a-a968e0fc2994/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 -> f4078ef7bc39da0337b6d8ed5ecbbcec336a37b8 [2018-11-22 23:36:31,097 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 23:36:31,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 23:36:31,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 23:36:31,110 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 23:36:31,111 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 23:36:31,111 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-11-22 23:36:31,152 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/data/25aec0430/e583210fc40946e1a01787ebcce77793/FLAGe9cc0b2ba [2018-11-22 23:36:31,549 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 23:36:31,549 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/sv-benchmarks/c/recursive-simple/sum_20x0_true-unreach-call_true-termination.c [2018-11-22 23:36:31,553 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/data/25aec0430/e583210fc40946e1a01787ebcce77793/FLAGe9cc0b2ba [2018-11-22 23:36:31,564 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/data/25aec0430/e583210fc40946e1a01787ebcce77793 [2018-11-22 23:36:31,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 23:36:31,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 23:36:31,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 23:36:31,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 23:36:31,571 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 23:36:31,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99c936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31, skipping insertion in model container [2018-11-22 23:36:31,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 23:36:31,590 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 23:36:31,699 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:36:31,702 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 23:36:31,712 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:36:31,720 INFO L195 MainTranslator]: Completed translation [2018-11-22 23:36:31,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31 WrapperNode [2018-11-22 23:36:31,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 23:36:31,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 23:36:31,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 23:36:31,721 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 23:36:31,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 23:36:31,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 23:36:31,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 23:36:31,733 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 23:36:31,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... [2018-11-22 23:36:31,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 23:36:31,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 23:36:31,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 23:36:31,744 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 23:36:31,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 23:36:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 23:36:31,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 23:36:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 23:36:31,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 23:36:31,822 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-22 23:36:31,822 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-22 23:36:31,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 23:36:31,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 23:36:31,929 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 23:36:31,929 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-22 23:36:31,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:36:31 BoogieIcfgContainer [2018-11-22 23:36:31,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 23:36:31,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 23:36:31,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 23:36:31,932 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 23:36:31,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 11:36:31" (1/3) ... [2018-11-22 23:36:31,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b024d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:36:31, skipping insertion in model container [2018-11-22 23:36:31,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:36:31" (2/3) ... [2018-11-22 23:36:31,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b024d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:36:31, skipping insertion in model container [2018-11-22 23:36:31,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:36:31" (3/3) ... [2018-11-22 23:36:31,935 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0_true-unreach-call_true-termination.c [2018-11-22 23:36:31,942 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 23:36:31,946 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 23:36:31,957 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 23:36:31,983 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 23:36:31,983 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 23:36:31,983 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 23:36:31,983 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 23:36:31,984 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 23:36:31,984 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 23:36:31,984 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 23:36:31,984 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 23:36:31,984 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 23:36:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-22 23:36:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-22 23:36:32,002 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:32,003 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:32,004 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:32,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-22 23:36:32,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:32,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:32,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:32,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:36:32,137 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 23:36:32,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-22 23:36:32,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 23:36:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 23:36:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-22 23:36:32,156 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-22 23:36:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:32,225 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-22 23:36:32,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 23:36:32,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-22 23:36:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:32,233 INFO L225 Difference]: With dead ends: 30 [2018-11-22 23:36:32,233 INFO L226 Difference]: Without dead ends: 18 [2018-11-22 23:36:32,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-22 23:36:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-22 23:36:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-22 23:36:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-22 23:36:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-22 23:36:32,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-22 23:36:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:32,261 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-22 23:36:32,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 23:36:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-22 23:36:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-22 23:36:32,263 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:32,263 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:32,264 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:32,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:32,264 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-22 23:36:32,264 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:32,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:32,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:32,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-22 23:36:32,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:32,319 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:32,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:32,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-22 23:36:32,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:32,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-22 23:36:32,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 23:36:32,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 23:36:32,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-22 23:36:32,386 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-22 23:36:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:32,454 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-22 23:36:32,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 23:36:32,454 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-22 23:36:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:32,455 INFO L225 Difference]: With dead ends: 25 [2018-11-22 23:36:32,455 INFO L226 Difference]: Without dead ends: 21 [2018-11-22 23:36:32,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-22 23:36:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-22 23:36:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-22 23:36:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-22 23:36:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-22 23:36:32,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-22 23:36:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:32,461 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-22 23:36:32,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 23:36:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-22 23:36:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-22 23:36:32,462 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:32,462 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:32,462 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:32,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-22 23:36:32,463 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:32,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:32,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:32,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-22 23:36:32,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:32,539 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:32,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 23:36:32,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 23:36:32,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:32,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-22 23:36:32,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:32,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-22 23:36:32,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-22 23:36:32,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-22 23:36:32,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-22 23:36:32,606 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-22 23:36:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:32,659 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-22 23:36:32,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 23:36:32,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-22 23:36:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:32,660 INFO L225 Difference]: With dead ends: 28 [2018-11-22 23:36:32,660 INFO L226 Difference]: Without dead ends: 24 [2018-11-22 23:36:32,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-22 23:36:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-22 23:36:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-22 23:36:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-22 23:36:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-22 23:36:32,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-22 23:36:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:32,663 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-22 23:36:32,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-22 23:36:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-22 23:36:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-22 23:36:32,664 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:32,664 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:32,664 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:32,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:32,664 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-22 23:36:32,664 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:32,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:32,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:32,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-22 23:36:32,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:32,748 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:32,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:36:32,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-22 23:36:32,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:32,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-22 23:36:32,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:32,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-22 23:36:32,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-22 23:36:32,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 23:36:32,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-22 23:36:32,814 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-22 23:36:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:32,894 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-22 23:36:32,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-22 23:36:32,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-22 23:36:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:32,895 INFO L225 Difference]: With dead ends: 31 [2018-11-22 23:36:32,896 INFO L226 Difference]: Without dead ends: 27 [2018-11-22 23:36:32,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-22 23:36:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-22 23:36:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-22 23:36:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-22 23:36:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-22 23:36:32,900 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-22 23:36:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:32,901 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-22 23:36:32,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-22 23:36:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-22 23:36:32,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-22 23:36:32,902 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:32,902 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:32,902 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:32,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:32,902 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-22 23:36:32,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:32,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:32,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:32,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-22 23:36:32,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:32,991 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:32,998 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:36:33,015 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:36:33,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:33,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-22 23:36:33,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:33,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-22 23:36:33,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-22 23:36:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 23:36:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-22 23:36:33,047 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-22 23:36:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:33,125 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-22 23:36:33,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-22 23:36:33,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-22 23:36:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:33,126 INFO L225 Difference]: With dead ends: 34 [2018-11-22 23:36:33,126 INFO L226 Difference]: Without dead ends: 30 [2018-11-22 23:36:33,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-22 23:36:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-22 23:36:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-22 23:36:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-22 23:36:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-22 23:36:33,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-22 23:36:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:33,130 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-22 23:36:33,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-22 23:36:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-22 23:36:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-22 23:36:33,131 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:33,131 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:33,131 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:33,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-22 23:36:33,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:33,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:33,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:33,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-22 23:36:33,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:33,227 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:33,239 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 23:36:33,259 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-22 23:36:33,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:33,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-22 23:36:33,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:33,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-22 23:36:33,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-22 23:36:33,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 23:36:33,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-22 23:36:33,295 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-22 23:36:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:33,369 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-22 23:36:33,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 23:36:33,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-22 23:36:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:33,370 INFO L225 Difference]: With dead ends: 37 [2018-11-22 23:36:33,371 INFO L226 Difference]: Without dead ends: 33 [2018-11-22 23:36:33,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-22 23:36:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-22 23:36:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-22 23:36:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-22 23:36:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-22 23:36:33,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-22 23:36:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:33,375 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-22 23:36:33,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-22 23:36:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-22 23:36:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-22 23:36:33,376 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:33,376 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:33,376 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:33,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-22 23:36:33,377 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:33,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-22 23:36:33,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:33,468 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:33,479 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 23:36:33,505 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-22 23:36:33,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:33,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-22 23:36:33,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:33,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-22 23:36:33,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-22 23:36:33,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 23:36:33,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-22 23:36:33,540 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-22 23:36:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:33,615 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-22 23:36:33,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 23:36:33,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-22 23:36:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:33,616 INFO L225 Difference]: With dead ends: 40 [2018-11-22 23:36:33,616 INFO L226 Difference]: Without dead ends: 36 [2018-11-22 23:36:33,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-22 23:36:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-22 23:36:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-22 23:36:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-22 23:36:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-22 23:36:33,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-22 23:36:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:33,620 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-22 23:36:33,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-22 23:36:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-22 23:36:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-22 23:36:33,621 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:33,621 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:33,622 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:33,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-22 23:36:33,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:33,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:33,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:33,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-22 23:36:33,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:33,731 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:33,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:33,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-22 23:36:33,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:33,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-22 23:36:33,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-22 23:36:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-22 23:36:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-22 23:36:33,779 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-22 23:36:33,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:33,875 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-22 23:36:33,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-22 23:36:33,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-22 23:36:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:33,878 INFO L225 Difference]: With dead ends: 43 [2018-11-22 23:36:33,878 INFO L226 Difference]: Without dead ends: 39 [2018-11-22 23:36:33,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-22 23:36:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-22 23:36:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-22 23:36:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-22 23:36:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-22 23:36:33,883 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-22 23:36:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:33,884 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-22 23:36:33,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-22 23:36:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-22 23:36:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-22 23:36:33,885 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:33,885 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:33,885 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:33,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-22 23:36:33,886 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:33,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:33,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:33,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-22 23:36:34,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:34,002 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:34,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 23:36:34,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 23:36:34,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:34,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-22 23:36:34,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:34,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-22 23:36:34,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-22 23:36:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-22 23:36:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-22 23:36:34,084 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-22 23:36:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:34,201 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-22 23:36:34,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-22 23:36:34,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-22 23:36:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:34,205 INFO L225 Difference]: With dead ends: 46 [2018-11-22 23:36:34,205 INFO L226 Difference]: Without dead ends: 42 [2018-11-22 23:36:34,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-22 23:36:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-22 23:36:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-22 23:36:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-22 23:36:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-22 23:36:34,210 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-22 23:36:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:34,211 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-22 23:36:34,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-22 23:36:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-22 23:36:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-22 23:36:34,212 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:34,212 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:34,212 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:34,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:34,212 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-22 23:36:34,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:34,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:34,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:34,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:34,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-22 23:36:34,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:34,317 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:34,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:36:34,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-22 23:36:34,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:34,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-22 23:36:34,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:34,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-22 23:36:34,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-22 23:36:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-22 23:36:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-22 23:36:34,383 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-22 23:36:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:34,489 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-22 23:36:34,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-22 23:36:34,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-22 23:36:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:34,490 INFO L225 Difference]: With dead ends: 49 [2018-11-22 23:36:34,491 INFO L226 Difference]: Without dead ends: 45 [2018-11-22 23:36:34,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-22 23:36:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-22 23:36:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-22 23:36:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-22 23:36:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-22 23:36:34,495 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-22 23:36:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:34,495 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-22 23:36:34,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-22 23:36:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-22 23:36:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-22 23:36:34,496 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:34,496 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:34,497 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:34,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:34,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-22 23:36:34,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:34,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:34,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:34,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:34,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-22 23:36:34,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:34,605 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:34,618 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:36:34,639 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:36:34,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:34,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-22 23:36:34,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:34,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-22 23:36:34,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-22 23:36:34,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-22 23:36:34,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-22 23:36:34,681 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-22 23:36:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:34,795 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-22 23:36:34,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-22 23:36:34,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-22 23:36:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:34,797 INFO L225 Difference]: With dead ends: 52 [2018-11-22 23:36:34,797 INFO L226 Difference]: Without dead ends: 48 [2018-11-22 23:36:34,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-22 23:36:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-22 23:36:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-22 23:36:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-22 23:36:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-22 23:36:34,801 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-22 23:36:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:34,801 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-22 23:36:34,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-22 23:36:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-22 23:36:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-22 23:36:34,801 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:34,802 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:34,802 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:34,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-22 23:36:34,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:34,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:34,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:34,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:34,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-22 23:36:34,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:34,926 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:34,932 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 23:36:34,977 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-22 23:36:34,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:34,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-22 23:36:35,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:35,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-22 23:36:35,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-22 23:36:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-22 23:36:35,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-22 23:36:35,027 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-22 23:36:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:35,222 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-22 23:36:35,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-22 23:36:35,223 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-22 23:36:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:35,223 INFO L225 Difference]: With dead ends: 55 [2018-11-22 23:36:35,224 INFO L226 Difference]: Without dead ends: 51 [2018-11-22 23:36:35,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-22 23:36:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-22 23:36:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-22 23:36:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-22 23:36:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-22 23:36:35,229 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-22 23:36:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:35,230 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-22 23:36:35,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-22 23:36:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-22 23:36:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-22 23:36:35,231 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:35,231 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:35,231 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:35,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:35,232 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-22 23:36:35,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:35,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:35,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:35,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:35,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-22 23:36:35,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:35,366 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:35,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 23:36:35,414 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-22 23:36:35,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:35,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-22 23:36:35,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:35,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-22 23:36:35,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-22 23:36:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-22 23:36:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-22 23:36:35,466 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-22 23:36:35,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:35,637 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-22 23:36:35,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-22 23:36:35,637 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-22 23:36:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:35,638 INFO L225 Difference]: With dead ends: 58 [2018-11-22 23:36:35,638 INFO L226 Difference]: Without dead ends: 54 [2018-11-22 23:36:35,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-22 23:36:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-22 23:36:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-22 23:36:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-22 23:36:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-22 23:36:35,642 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-22 23:36:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:35,642 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-22 23:36:35,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-22 23:36:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-22 23:36:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-22 23:36:35,643 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:35,643 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:35,644 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:35,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:35,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-22 23:36:35,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:35,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:35,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:35,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:35,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-22 23:36:35,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:35,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:35,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:35,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-22 23:36:35,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:35,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-22 23:36:35,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-22 23:36:35,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-22 23:36:35,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-22 23:36:35,838 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-22 23:36:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:36,003 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-22 23:36:36,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-22 23:36:36,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-22 23:36:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:36,005 INFO L225 Difference]: With dead ends: 61 [2018-11-22 23:36:36,005 INFO L226 Difference]: Without dead ends: 57 [2018-11-22 23:36:36,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-22 23:36:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-22 23:36:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-22 23:36:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-22 23:36:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-22 23:36:36,011 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-22 23:36:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:36,011 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-22 23:36:36,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-22 23:36:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-22 23:36:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-22 23:36:36,012 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:36,012 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:36,013 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:36,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-22 23:36:36,013 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:36,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:36,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:36,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:36,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-22 23:36:36,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:36,144 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:36,150 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 23:36:36,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 23:36:36,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:36,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-22 23:36:36,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:36,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-22 23:36:36,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-22 23:36:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-22 23:36:36,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-22 23:36:36,224 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-22 23:36:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:36,406 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-22 23:36:36,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-22 23:36:36,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-22 23:36:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:36,407 INFO L225 Difference]: With dead ends: 64 [2018-11-22 23:36:36,408 INFO L226 Difference]: Without dead ends: 60 [2018-11-22 23:36:36,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-22 23:36:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-22 23:36:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-22 23:36:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-22 23:36:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-22 23:36:36,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-22 23:36:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:36,411 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-22 23:36:36,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-22 23:36:36,412 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-22 23:36:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-22 23:36:36,412 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:36,413 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:36,413 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:36,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-22 23:36:36,413 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:36,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:36,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:36,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:36,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-22 23:36:36,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:36,523 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:36,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:36:36,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-22 23:36:36,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:36,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-22 23:36:36,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:36,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-22 23:36:36,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-22 23:36:36,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-22 23:36:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-22 23:36:36,598 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-22 23:36:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:36,776 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-22 23:36:36,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-22 23:36:36,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-22 23:36:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:36,776 INFO L225 Difference]: With dead ends: 67 [2018-11-22 23:36:36,776 INFO L226 Difference]: Without dead ends: 63 [2018-11-22 23:36:36,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-22 23:36:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-22 23:36:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-22 23:36:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-22 23:36:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-22 23:36:36,779 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-22 23:36:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:36,780 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-22 23:36:36,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-22 23:36:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-22 23:36:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-22 23:36:36,780 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:36,780 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:36,780 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:36,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-22 23:36:36,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:36,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:36,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:36,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:36,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-22 23:36:36,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:36,960 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:36,967 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:36:36,994 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:36:36,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:36,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-22 23:36:37,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:37,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-22 23:36:37,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-22 23:36:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-22 23:36:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-22 23:36:37,040 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-22 23:36:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:37,218 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-22 23:36:37,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-22 23:36:37,218 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-22 23:36:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:37,219 INFO L225 Difference]: With dead ends: 70 [2018-11-22 23:36:37,219 INFO L226 Difference]: Without dead ends: 66 [2018-11-22 23:36:37,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-22 23:36:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-22 23:36:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-22 23:36:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-22 23:36:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-22 23:36:37,223 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-22 23:36:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:37,223 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-22 23:36:37,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-22 23:36:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-22 23:36:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-22 23:36:37,224 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:37,224 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:37,224 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:37,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:37,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-11-22 23:36:37,225 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:37,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:37,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:37,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:37,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-22 23:36:37,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:37,396 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:37,403 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 23:36:37,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-22 23:36:37,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:37,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-22 23:36:37,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:37,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-22 23:36:37,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-22 23:36:37,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-22 23:36:37,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-22 23:36:37,490 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-22 23:36:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:37,686 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-22 23:36:37,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-22 23:36:37,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-22 23:36:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:37,686 INFO L225 Difference]: With dead ends: 73 [2018-11-22 23:36:37,687 INFO L226 Difference]: Without dead ends: 69 [2018-11-22 23:36:37,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-22 23:36:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-22 23:36:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-22 23:36:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-22 23:36:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-22 23:36:37,690 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-22 23:36:37,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:37,690 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-22 23:36:37,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-22 23:36:37,690 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-22 23:36:37,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-22 23:36:37,691 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:37,691 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:37,691 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:37,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:37,692 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-11-22 23:36:37,692 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:37,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:37,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:37,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:37,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-22 23:36:37,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:37,885 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:37,891 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 23:36:37,922 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-22 23:36:37,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:37,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-22 23:36:37,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:37,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-22 23:36:37,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-22 23:36:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-22 23:36:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-22 23:36:37,963 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-22 23:36:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:38,179 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-22 23:36:38,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-22 23:36:38,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-22 23:36:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:38,181 INFO L225 Difference]: With dead ends: 76 [2018-11-22 23:36:38,181 INFO L226 Difference]: Without dead ends: 72 [2018-11-22 23:36:38,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-22 23:36:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-22 23:36:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-22 23:36:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-22 23:36:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-22 23:36:38,185 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-22 23:36:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:38,187 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-22 23:36:38,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-22 23:36:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-22 23:36:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-22 23:36:38,188 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:38,188 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:38,189 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:38,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:38,189 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-11-22 23:36:38,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:38,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:38,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:38,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:38,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-22 23:36:38,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:38,374 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:38,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:38,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-22 23:36:38,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:38,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-22 23:36:38,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-22 23:36:38,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-22 23:36:38,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-22 23:36:38,440 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-22 23:36:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:38,684 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-22 23:36:38,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-22 23:36:38,684 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-22 23:36:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:38,685 INFO L225 Difference]: With dead ends: 79 [2018-11-22 23:36:38,685 INFO L226 Difference]: Without dead ends: 75 [2018-11-22 23:36:38,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-22 23:36:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-22 23:36:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-22 23:36:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-22 23:36:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-22 23:36:38,688 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-22 23:36:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:38,689 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-22 23:36:38,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-22 23:36:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-22 23:36:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-22 23:36:38,690 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:38,690 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:38,690 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:38,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:38,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-11-22 23:36:38,690 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:38,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:38,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:38,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:36:38,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-11-22 23:36:39,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:39,713 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:39,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 23:36:39,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 23:36:39,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:39,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2018-11-22 23:36:40,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:40,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 53 [2018-11-22 23:36:40,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-22 23:36:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-22 23:36:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2645, Unknown=0, NotChecked=0, Total=2756 [2018-11-22 23:36:40,019 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 53 states. [2018-11-22 23:36:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:41,996 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-22 23:36:41,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-22 23:36:41,996 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 133 [2018-11-22 23:36:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:41,997 INFO L225 Difference]: With dead ends: 82 [2018-11-22 23:36:41,997 INFO L226 Difference]: Without dead ends: 78 [2018-11-22 23:36:41,998 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 128 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=484, Invalid=8446, Unknown=0, NotChecked=0, Total=8930 [2018-11-22 23:36:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-22 23:36:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-22 23:36:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-22 23:36:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-22 23:36:42,002 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2018-11-22 23:36:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:42,002 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-22 23:36:42,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-22 23:36:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-22 23:36:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-22 23:36:42,003 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:36:42,003 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:36:42,004 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:36:42,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:36:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2018-11-22 23:36:42,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 23:36:42,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 23:36:42,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:42,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:36:42,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:36:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:36:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-11-22 23:36:42,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:36:42,215 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:36:42,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:36:42,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-22 23:36:42,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:36:42,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:36:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 41 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-11-22 23:36:42,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 23:36:42,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-22 23:36:42,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-22 23:36:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-22 23:36:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-22 23:36:42,305 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 25 states. [2018-11-22 23:36:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:36:42,467 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-11-22 23:36:42,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-22 23:36:42,471 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 139 [2018-11-22 23:36:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:36:42,471 INFO L225 Difference]: With dead ends: 78 [2018-11-22 23:36:42,471 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 23:36:42,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-22 23:36:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 23:36:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 23:36:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 23:36:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 23:36:42,473 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2018-11-22 23:36:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:36:42,473 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 23:36:42,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-22 23:36:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 23:36:42,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 23:36:42,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-22 23:36:42,506 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-22 23:36:42,506 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-22 23:36:42,506 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-22 23:36:42,506 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-22 23:36:42,506 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-22 23:36:42,506 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-22 23:36:42,507 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 20) (<= 20 main_~a~0)) [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-22 23:36:42,507 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-22 23:36:42,508 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-22 23:36:42,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 11:36:42 BoogieIcfgContainer [2018-11-22 23:36:42,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 23:36:42,510 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 23:36:42,510 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 23:36:42,511 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 23:36:42,511 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:36:31" (3/4) ... [2018-11-22 23:36:42,514 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 23:36:42,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-22 23:36:42,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-22 23:36:42,520 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-22 23:36:42,523 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-22 23:36:42,523 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 23:36:42,523 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 23:36:42,551 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a3879839-972d-4007-859a-a968e0fc2994/bin-2019/uautomizer/witness.graphml [2018-11-22 23:36:42,551 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 23:36:42,552 INFO L168 Benchmark]: Toolchain (without parser) took 10984.24 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 283.6 MB). Free memory was 959.3 MB in the beginning and 919.5 MB in the end (delta: 39.8 MB). Peak memory consumption was 323.4 MB. Max. memory is 11.5 GB. [2018-11-22 23:36:42,552 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:36:42,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.15 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:36:42,553 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.28 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:36:42,553 INFO L168 Benchmark]: Boogie Preprocessor took 10.18 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:36:42,553 INFO L168 Benchmark]: RCFGBuilder took 186.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-22 23:36:42,554 INFO L168 Benchmark]: TraceAbstraction took 10579.58 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 147.8 MB). Free memory was 1.1 GB in the beginning and 919.5 MB in the end (delta: 202.2 MB). Peak memory consumption was 350.0 MB. Max. memory is 11.5 GB. [2018-11-22 23:36:42,554 INFO L168 Benchmark]: Witness Printer took 40.67 ms. Allocated memory is still 1.3 GB. Free memory is still 919.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:36:42,556 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 152.15 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.28 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.18 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 186.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10579.58 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 147.8 MB). Free memory was 1.1 GB in the beginning and 919.5 MB in the end (delta: 202.2 MB). Peak memory consumption was 350.0 MB. Max. memory is 11.5 GB. * Witness Printer took 40.67 ms. Allocated memory is still 1.3 GB. Free memory is still 919.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 10.5s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 4.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 576 SDslu, 3156 SDs, 0 SdLazy, 3698 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2525 GetRequests, 1907 SyntacticMatches, 21 SemanticMatches, 597 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, 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: 0.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 28 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 3331 NumberOfCodeBlocks, 3331 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3288 ConstructedInterpolants, 0 QuantifiedInterpolants, 971208 SizeOfPredicates, 276 NumberOfNonLiveVariables, 4914 ConjunctsInSsa, 677 ConjunctsInUnsatCore, 43 InterpolantComputations, 1 PerfectInterpolantSequences, 11387/20328 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...