./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 61b7d6607ccac63dcd99f2b87de00fb6f01869a1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:06:42,069 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:06:42,069 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:06:42,075 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:06:42,076 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:06:42,076 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:06:42,077 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:06:42,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:06:42,079 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:06:42,080 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:06:42,081 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:06:42,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:06:42,081 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:06:42,082 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:06:42,083 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:06:42,083 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:06:42,084 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:06:42,084 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:06:42,086 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:06:42,087 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:06:42,088 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:06:42,088 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:06:42,090 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:06:42,090 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:06:42,090 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:06:42,091 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:06:42,092 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:06:42,092 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:06:42,093 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:06:42,094 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:06:42,094 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:06:42,094 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:06:42,094 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:06:42,094 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:06:42,095 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:06:42,095 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:06:42,096 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 12:06:42,106 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:06:42,106 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:06:42,107 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:06:42,107 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 12:06:42,107 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:06:42,107 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:06:42,107 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 12:06:42,108 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:06:42,108 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:06:42,108 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:06:42,108 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:06:42,108 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:06:42,108 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:06:42,108 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:06:42,108 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:06:42,109 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:06:42,109 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:06:42,109 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:06:42,109 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:06:42,109 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:06:42,109 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:06:42,109 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:06:42,110 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:06:42,110 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:06:42,110 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:06:42,110 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:06:42,110 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:06:42,110 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 12:06:42,110 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:06:42,110 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:06:42,111 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_468af234-86bd-4ebf-85e5-86cac275a63c/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 -> 61b7d6607ccac63dcd99f2b87de00fb6f01869a1 [2018-11-18 12:06:42,135 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:06:42,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:06:42,147 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:06:42,149 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:06:42,149 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:06:42,150 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/../../sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.c [2018-11-18 12:06:42,196 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/data/a5be6d1ea/876ef59f14934877b41f2d66e9e59abe/FLAG99ecd6a8a [2018-11-18 12:06:42,587 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:06:42,587 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/sv-benchmarks/c/loop-industry-pattern/nested_true-unreach-call.c [2018-11-18 12:06:42,591 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/data/a5be6d1ea/876ef59f14934877b41f2d66e9e59abe/FLAG99ecd6a8a [2018-11-18 12:06:42,600 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/data/a5be6d1ea/876ef59f14934877b41f2d66e9e59abe [2018-11-18 12:06:42,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:06:42,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 12:06:42,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:06:42,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:06:42,607 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:06:42,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@725ebad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42, skipping insertion in model container [2018-11-18 12:06:42,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:06:42,629 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:06:42,734 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:06:42,737 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:06:42,748 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:06:42,756 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:06:42,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42 WrapperNode [2018-11-18 12:06:42,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:06:42,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:06:42,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:06:42,757 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:06:42,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... [2018-11-18 12:06:42,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:06:42,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:06:42,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:06:42,782 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:06:42,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:06:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:06:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 12:06:42,868 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet [2018-11-18 12:06:42,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:06:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 12:06:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 12:06:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure nondet [2018-11-18 12:06:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:06:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:06:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:06:43,015 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:06:43,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:06:43 BoogieIcfgContainer [2018-11-18 12:06:43,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:06:43,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:06:43,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:06:43,020 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:06:43,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:06:42" (1/3) ... [2018-11-18 12:06:43,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a28b3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:06:43, skipping insertion in model container [2018-11-18 12:06:43,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:06:42" (2/3) ... [2018-11-18 12:06:43,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a28b3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:06:43, skipping insertion in model container [2018-11-18 12:06:43,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:06:43" (3/3) ... [2018-11-18 12:06:43,023 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call.c [2018-11-18 12:06:43,031 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:06:43,038 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:06:43,052 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:06:43,078 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 12:06:43,079 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:06:43,079 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:06:43,079 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:06:43,079 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:06:43,079 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:06:43,079 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:06:43,079 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:06:43,080 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:06:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-11-18 12:06:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 12:06:43,101 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:43,102 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:43,104 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:43,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 11016370, now seen corresponding path program 1 times [2018-11-18 12:06:43,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:43,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:43,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:43,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,203 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:06:43,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:06:43,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 12:06:43,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 12:06:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 12:06:43,217 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-11-18 12:06:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:43,234 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2018-11-18 12:06:43,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 12:06:43,235 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-11-18 12:06:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:43,240 INFO L225 Difference]: With dead ends: 44 [2018-11-18 12:06:43,240 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 12:06:43,242 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 12:06:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 12:06:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-18 12:06:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 12:06:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-11-18 12:06:43,264 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2018-11-18 12:06:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:43,264 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-11-18 12:06:43,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 12:06:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-11-18 12:06:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 12:06:43,265 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:43,265 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:43,265 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:43,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1033619079, now seen corresponding path program 1 times [2018-11-18 12:06:43,266 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:43,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:43,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:43,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:06:43,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 12:06:43,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:06:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:06:43,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:06:43,313 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2018-11-18 12:06:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:43,361 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-11-18 12:06:43,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:06:43,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-11-18 12:06:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:43,362 INFO L225 Difference]: With dead ends: 46 [2018-11-18 12:06:43,362 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 12:06:43,363 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:06:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 12:06:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-11-18 12:06:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 12:06:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-11-18 12:06:43,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2018-11-18 12:06:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:43,367 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-11-18 12:06:43,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:06:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-11-18 12:06:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 12:06:43,368 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:43,368 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:43,368 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:43,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1253934194, now seen corresponding path program 1 times [2018-11-18 12:06:43,369 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:43,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:43,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:43,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:43,405 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:43,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:06:43,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:06:43,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-11-18 12:06:43,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:06:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:06:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:06:43,472 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2018-11-18 12:06:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:43,561 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2018-11-18 12:06:43,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:06:43,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-11-18 12:06:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:43,564 INFO L225 Difference]: With dead ends: 66 [2018-11-18 12:06:43,564 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 12:06:43,564 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-18 12:06:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 12:06:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2018-11-18 12:06:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 12:06:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2018-11-18 12:06:43,574 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2018-11-18 12:06:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:43,574 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2018-11-18 12:06:43,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:06:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2018-11-18 12:06:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 12:06:43,575 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:43,575 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:43,575 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:43,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash -464320941, now seen corresponding path program 1 times [2018-11-18 12:06:43,576 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:43,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:43,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:43,646 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:43,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:43,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-18 12:06:43,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:06:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:06:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:06:43,689 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2018-11-18 12:06:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:43,714 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2018-11-18 12:06:43,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:06:43,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-11-18 12:06:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:43,715 INFO L225 Difference]: With dead ends: 84 [2018-11-18 12:06:43,715 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 12:06:43,716 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:06:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 12:06:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2018-11-18 12:06:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 12:06:43,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-11-18 12:06:43,719 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 28 [2018-11-18 12:06:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:43,720 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-11-18 12:06:43,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:06:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-11-18 12:06:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 12:06:43,720 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:43,720 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:43,721 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:43,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash -967588774, now seen corresponding path program 2 times [2018-11-18 12:06:43,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:43,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:43,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:43,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:43,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:43,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:06:43,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:06:43,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:43,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:43,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 12:06:43,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:06:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:06:43,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:06:43,809 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 6 states. [2018-11-18 12:06:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:43,852 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2018-11-18 12:06:43,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:06:43,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-11-18 12:06:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:43,853 INFO L225 Difference]: With dead ends: 100 [2018-11-18 12:06:43,853 INFO L226 Difference]: Without dead ends: 62 [2018-11-18 12:06:43,853 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:06:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-18 12:06:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2018-11-18 12:06:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 12:06:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2018-11-18 12:06:43,859 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 32 [2018-11-18 12:06:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:43,859 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2018-11-18 12:06:43,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:06:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2018-11-18 12:06:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 12:06:43,860 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:43,860 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:43,860 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:43,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash 505947873, now seen corresponding path program 3 times [2018-11-18 12:06:43,861 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:43,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:43,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:43,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:43,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:43,903 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:43,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:06:43,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:06:43,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:43,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 12:06:44,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:06:44,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-11-18 12:06:44,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 12:06:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 12:06:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:06:44,052 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 14 states. [2018-11-18 12:06:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:44,250 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2018-11-18 12:06:44,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 12:06:44,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-11-18 12:06:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:44,253 INFO L225 Difference]: With dead ends: 176 [2018-11-18 12:06:44,253 INFO L226 Difference]: Without dead ends: 130 [2018-11-18 12:06:44,254 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:06:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-18 12:06:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2018-11-18 12:06:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-18 12:06:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 152 transitions. [2018-11-18 12:06:44,265 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 152 transitions. Word has length 36 [2018-11-18 12:06:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:44,266 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 152 transitions. [2018-11-18 12:06:44,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 12:06:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 152 transitions. [2018-11-18 12:06:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 12:06:44,267 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:44,267 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:44,267 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:44,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1831451149, now seen corresponding path program 1 times [2018-11-18 12:06:44,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:44,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:44,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:44,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:44,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:44,355 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:44,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:44,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:44,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:44,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 12:06:44,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:06:44,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:06:44,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:06:44,399 INFO L87 Difference]: Start difference. First operand 124 states and 152 transitions. Second operand 9 states. [2018-11-18 12:06:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:44,467 INFO L93 Difference]: Finished difference Result 219 states and 278 transitions. [2018-11-18 12:06:44,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:06:44,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2018-11-18 12:06:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:44,470 INFO L225 Difference]: With dead ends: 219 [2018-11-18 12:06:44,470 INFO L226 Difference]: Without dead ends: 156 [2018-11-18 12:06:44,470 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:06:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-18 12:06:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2018-11-18 12:06:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-18 12:06:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2018-11-18 12:06:44,481 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 44 [2018-11-18 12:06:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:44,482 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2018-11-18 12:06:44,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:06:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2018-11-18 12:06:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-18 12:06:44,483 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:44,483 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:44,483 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:44,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:44,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1136650758, now seen corresponding path program 2 times [2018-11-18 12:06:44,484 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:44,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:44,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:44,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:44,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:44,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:44,543 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:44,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:06:44,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:06:44,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:44,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:44,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:44,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2018-11-18 12:06:44,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:06:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:06:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:06:44,603 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand 12 states. [2018-11-18 12:06:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:44,735 INFO L93 Difference]: Finished difference Result 317 states and 401 transitions. [2018-11-18 12:06:44,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 12:06:44,735 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-11-18 12:06:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:44,737 INFO L225 Difference]: With dead ends: 317 [2018-11-18 12:06:44,737 INFO L226 Difference]: Without dead ends: 238 [2018-11-18 12:06:44,737 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:06:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-11-18 12:06:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 191. [2018-11-18 12:06:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-11-18 12:06:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2018-11-18 12:06:44,747 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 48 [2018-11-18 12:06:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:44,748 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2018-11-18 12:06:44,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:06:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2018-11-18 12:06:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-18 12:06:44,749 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:44,749 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:44,749 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:44,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2091158145, now seen corresponding path program 3 times [2018-11-18 12:06:44,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:44,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:44,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:44,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:44,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:44,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:44,823 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:44,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:06:44,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:06:44,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:44,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-18 12:06:44,911 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:06:44,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2018-11-18 12:06:44,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:06:44,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:06:44,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:06:44,912 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand 18 states. [2018-11-18 12:06:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:45,285 INFO L93 Difference]: Finished difference Result 365 states and 455 transitions. [2018-11-18 12:06:45,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-18 12:06:45,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-11-18 12:06:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:45,287 INFO L225 Difference]: With dead ends: 365 [2018-11-18 12:06:45,287 INFO L226 Difference]: Without dead ends: 255 [2018-11-18 12:06:45,288 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 12:06:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-11-18 12:06:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 225. [2018-11-18 12:06:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-11-18 12:06:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2018-11-18 12:06:45,301 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 52 [2018-11-18 12:06:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:45,302 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2018-11-18 12:06:45,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:06:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2018-11-18 12:06:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-18 12:06:45,303 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:45,303 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:45,303 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:45,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:45,303 INFO L82 PathProgramCache]: Analyzing trace with hash 600322573, now seen corresponding path program 1 times [2018-11-18 12:06:45,303 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:45,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:45,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:45,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-18 12:06:45,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:06:45,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 12:06:45,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:06:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:06:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:06:45,326 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand 3 states. [2018-11-18 12:06:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:45,346 INFO L93 Difference]: Finished difference Result 336 states and 416 transitions. [2018-11-18 12:06:45,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:06:45,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2018-11-18 12:06:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:45,348 INFO L225 Difference]: With dead ends: 336 [2018-11-18 12:06:45,348 INFO L226 Difference]: Without dead ends: 231 [2018-11-18 12:06:45,349 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:06:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-11-18 12:06:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2018-11-18 12:06:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-11-18 12:06:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2018-11-18 12:06:45,358 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 60 [2018-11-18 12:06:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:45,358 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2018-11-18 12:06:45,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:06:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2018-11-18 12:06:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-18 12:06:45,359 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:45,359 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:45,359 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:45,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash 657580875, now seen corresponding path program 1 times [2018-11-18 12:06:45,360 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:45,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:45,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:45,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:45,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:45,435 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:45,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:45,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:45,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:45,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 12:06:45,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:06:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:06:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:06:45,494 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand 13 states. [2018-11-18 12:06:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:45,539 INFO L93 Difference]: Finished difference Result 411 states and 513 transitions. [2018-11-18 12:06:45,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:06:45,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2018-11-18 12:06:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:45,546 INFO L225 Difference]: With dead ends: 411 [2018-11-18 12:06:45,546 INFO L226 Difference]: Without dead ends: 290 [2018-11-18 12:06:45,546 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:06:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-18 12:06:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 261. [2018-11-18 12:06:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-11-18 12:06:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 321 transitions. [2018-11-18 12:06:45,555 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 321 transitions. Word has length 60 [2018-11-18 12:06:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:45,555 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 321 transitions. [2018-11-18 12:06:45,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:06:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 321 transitions. [2018-11-18 12:06:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-18 12:06:45,556 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:45,557 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:45,557 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:45,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1751071406, now seen corresponding path program 2 times [2018-11-18 12:06:45,557 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:45,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:45,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:45,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:45,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:45,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:45,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:06:45,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:06:45,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:45,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:45,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:45,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 16 [2018-11-18 12:06:45,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 12:06:45,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 12:06:45,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:06:45,727 INFO L87 Difference]: Start difference. First operand 261 states and 321 transitions. Second operand 16 states. [2018-11-18 12:06:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:45,899 INFO L93 Difference]: Finished difference Result 530 states and 664 transitions. [2018-11-18 12:06:45,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-18 12:06:45,899 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2018-11-18 12:06:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:45,901 INFO L225 Difference]: With dead ends: 530 [2018-11-18 12:06:45,901 INFO L226 Difference]: Without dead ends: 385 [2018-11-18 12:06:45,901 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=480, Unknown=0, NotChecked=0, Total=756 [2018-11-18 12:06:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2018-11-18 12:06:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 255. [2018-11-18 12:06:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-11-18 12:06:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 315 transitions. [2018-11-18 12:06:45,910 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 315 transitions. Word has length 64 [2018-11-18 12:06:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:45,910 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 315 transitions. [2018-11-18 12:06:45,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 12:06:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 315 transitions. [2018-11-18 12:06:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-18 12:06:45,911 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:45,911 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:45,911 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:45,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:45,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1842263079, now seen corresponding path program 3 times [2018-11-18 12:06:45,913 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:45,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:45,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:45,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:45,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:45,999 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:46,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:06:46,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:06:46,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:46,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-18 12:06:46,114 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:06:46,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2018-11-18 12:06:46,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:06:46,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:06:46,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:06:46,115 INFO L87 Difference]: Start difference. First operand 255 states and 315 transitions. Second operand 18 states. [2018-11-18 12:06:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:46,326 INFO L93 Difference]: Finished difference Result 536 states and 668 transitions. [2018-11-18 12:06:46,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-18 12:06:46,326 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2018-11-18 12:06:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:46,328 INFO L225 Difference]: With dead ends: 536 [2018-11-18 12:06:46,328 INFO L226 Difference]: Without dead ends: 394 [2018-11-18 12:06:46,328 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2018-11-18 12:06:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-11-18 12:06:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 299. [2018-11-18 12:06:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-18 12:06:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 367 transitions. [2018-11-18 12:06:46,343 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 367 transitions. Word has length 68 [2018-11-18 12:06:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:46,343 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 367 transitions. [2018-11-18 12:06:46,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:06:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 367 transitions. [2018-11-18 12:06:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-18 12:06:46,345 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:46,345 INFO L375 BasicCegarLoop]: trace histogram [30, 28, 28, 28, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:46,345 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:46,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 454026756, now seen corresponding path program 1 times [2018-11-18 12:06:46,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:46,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:46,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:46,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:46,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 846 proven. 392 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2018-11-18 12:06:46,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:46,481 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:46,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:46,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 844 proven. 392 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2018-11-18 12:06:46,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:46,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-18 12:06:46,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 12:06:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 12:06:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:06:46,553 INFO L87 Difference]: Start difference. First operand 299 states and 367 transitions. Second operand 17 states. [2018-11-18 12:06:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:46,660 INFO L93 Difference]: Finished difference Result 512 states and 634 transitions. [2018-11-18 12:06:46,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 12:06:46,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 143 [2018-11-18 12:06:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:46,667 INFO L225 Difference]: With dead ends: 512 [2018-11-18 12:06:46,667 INFO L226 Difference]: Without dead ends: 349 [2018-11-18 12:06:46,667 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:06:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-11-18 12:06:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 323. [2018-11-18 12:06:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-11-18 12:06:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 397 transitions. [2018-11-18 12:06:46,680 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 397 transitions. Word has length 143 [2018-11-18 12:06:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:46,680 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 397 transitions. [2018-11-18 12:06:46,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 12:06:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 397 transitions. [2018-11-18 12:06:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-18 12:06:46,681 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:46,681 INFO L375 BasicCegarLoop]: trace histogram [32, 30, 30, 30, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:46,682 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:46,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:46,682 INFO L82 PathProgramCache]: Analyzing trace with hash 231203236, now seen corresponding path program 2 times [2018-11-18 12:06:46,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:46,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:46,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:46,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:46,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 966 proven. 450 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2018-11-18 12:06:46,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:46,810 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:46,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:06:46,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:06:46,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:46,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 964 proven. 450 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2018-11-18 12:06:46,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:46,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-18 12:06:46,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:06:46,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:06:46,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:06:46,869 INFO L87 Difference]: Start difference. First operand 323 states and 397 transitions. Second operand 18 states. [2018-11-18 12:06:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:46,947 INFO L93 Difference]: Finished difference Result 548 states and 679 transitions. [2018-11-18 12:06:46,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 12:06:46,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 151 [2018-11-18 12:06:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:46,949 INFO L225 Difference]: With dead ends: 548 [2018-11-18 12:06:46,949 INFO L226 Difference]: Without dead ends: 373 [2018-11-18 12:06:46,949 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-18 12:06:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2018-11-18 12:06:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 347. [2018-11-18 12:06:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-11-18 12:06:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 427 transitions. [2018-11-18 12:06:46,960 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 427 transitions. Word has length 151 [2018-11-18 12:06:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:46,961 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 427 transitions. [2018-11-18 12:06:46,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:06:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 427 transitions. [2018-11-18 12:06:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-11-18 12:06:46,962 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:46,962 INFO L375 BasicCegarLoop]: trace histogram [34, 32, 32, 32, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:46,962 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:46,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:46,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1344922692, now seen corresponding path program 3 times [2018-11-18 12:06:46,963 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:46,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:46,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:46,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:46,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 1094 proven. 512 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2018-11-18 12:06:47,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:47,088 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:47,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:06:47,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:06:47,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:47,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 64 proven. 1095 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-11-18 12:06:47,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:47,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2018-11-18 12:06:47,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-18 12:06:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-18 12:06:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2018-11-18 12:06:47,251 INFO L87 Difference]: Start difference. First operand 347 states and 427 transitions. Second operand 27 states. [2018-11-18 12:06:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:47,833 INFO L93 Difference]: Finished difference Result 793 states and 988 transitions. [2018-11-18 12:06:47,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-18 12:06:47,834 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 159 [2018-11-18 12:06:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:47,835 INFO L225 Difference]: With dead ends: 793 [2018-11-18 12:06:47,835 INFO L226 Difference]: Without dead ends: 606 [2018-11-18 12:06:47,836 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=910, Invalid=2872, Unknown=0, NotChecked=0, Total=3782 [2018-11-18 12:06:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2018-11-18 12:06:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 567. [2018-11-18 12:06:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2018-11-18 12:06:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 700 transitions. [2018-11-18 12:06:47,854 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 700 transitions. Word has length 159 [2018-11-18 12:06:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:47,854 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 700 transitions. [2018-11-18 12:06:47,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-18 12:06:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 700 transitions. [2018-11-18 12:06:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-18 12:06:47,856 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:47,856 INFO L375 BasicCegarLoop]: trace histogram [36, 34, 34, 33, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:47,857 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:47,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1194002656, now seen corresponding path program 1 times [2018-11-18 12:06:47,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:47,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:47,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:47,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:47,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2389 backedges. 1230 proven. 578 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2018-11-18 12:06:47,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:47,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:48,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:48,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2389 backedges. 1228 proven. 578 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2018-11-18 12:06:48,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:48,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-18 12:06:48,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 12:06:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 12:06:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:06:48,057 INFO L87 Difference]: Start difference. First operand 567 states and 700 transitions. Second operand 20 states. [2018-11-18 12:06:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:48,145 INFO L93 Difference]: Finished difference Result 1022 states and 1268 transitions. [2018-11-18 12:06:48,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 12:06:48,145 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 167 [2018-11-18 12:06:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:48,147 INFO L225 Difference]: With dead ends: 1022 [2018-11-18 12:06:48,147 INFO L226 Difference]: Without dead ends: 627 [2018-11-18 12:06:48,149 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-18 12:06:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-11-18 12:06:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 591. [2018-11-18 12:06:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-11-18 12:06:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 730 transitions. [2018-11-18 12:06:48,170 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 730 transitions. Word has length 167 [2018-11-18 12:06:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:48,171 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 730 transitions. [2018-11-18 12:06:48,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 12:06:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 730 transitions. [2018-11-18 12:06:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-11-18 12:06:48,173 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:48,173 INFO L375 BasicCegarLoop]: trace histogram [38, 36, 36, 35, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:48,173 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:48,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2141547272, now seen corresponding path program 2 times [2018-11-18 12:06:48,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:48,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:48,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:48,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:48,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 1374 proven. 648 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2018-11-18 12:06:48,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:48,352 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:48,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:06:48,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:06:48,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:48,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 1372 proven. 648 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2018-11-18 12:06:48,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:48,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-18 12:06:48,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 12:06:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 12:06:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:06:48,414 INFO L87 Difference]: Start difference. First operand 591 states and 730 transitions. Second operand 21 states. [2018-11-18 12:06:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:48,508 INFO L93 Difference]: Finished difference Result 1073 states and 1334 transitions. [2018-11-18 12:06:48,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 12:06:48,509 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 175 [2018-11-18 12:06:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:48,512 INFO L225 Difference]: With dead ends: 1073 [2018-11-18 12:06:48,512 INFO L226 Difference]: Without dead ends: 666 [2018-11-18 12:06:48,513 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:06:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2018-11-18 12:06:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 627. [2018-11-18 12:06:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2018-11-18 12:06:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 775 transitions. [2018-11-18 12:06:48,542 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 775 transitions. Word has length 175 [2018-11-18 12:06:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:48,542 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 775 transitions. [2018-11-18 12:06:48,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 12:06:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 775 transitions. [2018-11-18 12:06:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-18 12:06:48,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:48,545 INFO L375 BasicCegarLoop]: trace histogram [40, 38, 38, 37, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:48,545 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:48,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1422490968, now seen corresponding path program 3 times [2018-11-18 12:06:48,545 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:48,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:48,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:48,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:48,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 1526 proven. 722 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2018-11-18 12:06:48,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:48,764 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:48,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:06:48,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:06:48,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:48,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2973 backedges. 76 proven. 1527 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2018-11-18 12:06:48,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:48,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2018-11-18 12:06:48,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-18 12:06:48,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-18 12:06:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:06:48,986 INFO L87 Difference]: Start difference. First operand 627 states and 775 transitions. Second operand 30 states. [2018-11-18 12:06:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:50,316 INFO L93 Difference]: Finished difference Result 1233 states and 1536 transitions. [2018-11-18 12:06:50,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-11-18 12:06:50,316 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 183 [2018-11-18 12:06:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:50,318 INFO L225 Difference]: With dead ends: 1233 [2018-11-18 12:06:50,319 INFO L226 Difference]: Without dead ends: 802 [2018-11-18 12:06:50,321 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1930, Invalid=6442, Unknown=0, NotChecked=0, Total=8372 [2018-11-18 12:06:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2018-11-18 12:06:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 675. [2018-11-18 12:06:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2018-11-18 12:06:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 835 transitions. [2018-11-18 12:06:50,355 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 835 transitions. Word has length 183 [2018-11-18 12:06:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:50,355 INFO L480 AbstractCegarLoop]: Abstraction has 675 states and 835 transitions. [2018-11-18 12:06:50,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-18 12:06:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 835 transitions. [2018-11-18 12:06:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-18 12:06:50,358 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:50,358 INFO L375 BasicCegarLoop]: trace histogram [42, 40, 40, 39, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:50,358 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:50,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1709127104, now seen corresponding path program 4 times [2018-11-18 12:06:50,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:50,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:50,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:50,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:50,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3289 backedges. 1686 proven. 800 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2018-11-18 12:06:50,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:50,610 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:50,616 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:06:50,634 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:06:50,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:50,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3289 backedges. 266 proven. 3023 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:06:51,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:51,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 64 [2018-11-18 12:06:51,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-18 12:06:51,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-18 12:06:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3197, Unknown=0, NotChecked=0, Total=4032 [2018-11-18 12:06:51,206 INFO L87 Difference]: Start difference. First operand 675 states and 835 transitions. Second operand 64 states. [2018-11-18 12:06:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:52,481 INFO L93 Difference]: Finished difference Result 1629 states and 2028 transitions. [2018-11-18 12:06:52,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-18 12:06:52,482 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 191 [2018-11-18 12:06:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:52,485 INFO L225 Difference]: With dead ends: 1629 [2018-11-18 12:06:52,485 INFO L226 Difference]: Without dead ends: 1162 [2018-11-18 12:06:52,486 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=859, Invalid=3301, Unknown=0, NotChecked=0, Total=4160 [2018-11-18 12:06:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2018-11-18 12:06:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1109. [2018-11-18 12:06:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2018-11-18 12:06:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1293 transitions. [2018-11-18 12:06:52,521 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1293 transitions. Word has length 191 [2018-11-18 12:06:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:52,521 INFO L480 AbstractCegarLoop]: Abstraction has 1109 states and 1293 transitions. [2018-11-18 12:06:52,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-18 12:06:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1293 transitions. [2018-11-18 12:06:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-11-18 12:06:52,523 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:52,523 INFO L375 BasicCegarLoop]: trace histogram [44, 42, 42, 41, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:52,523 INFO L423 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:52,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1793916256, now seen corresponding path program 5 times [2018-11-18 12:06:52,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:52,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:52,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:52,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:52,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3621 backedges. 1854 proven. 882 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2018-11-18 12:06:52,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:52,723 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:52,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:06:52,783 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-11-18 12:06:52,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:52,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3621 backedges. 1852 proven. 882 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2018-11-18 12:06:52,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:52,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-18 12:06:52,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 12:06:52,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 12:06:52,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:06:52,821 INFO L87 Difference]: Start difference. First operand 1109 states and 1293 transitions. Second operand 24 states. [2018-11-18 12:06:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:52,918 INFO L93 Difference]: Finished difference Result 2137 states and 2493 transitions. [2018-11-18 12:06:52,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 12:06:52,919 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 199 [2018-11-18 12:06:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:52,921 INFO L225 Difference]: With dead ends: 2137 [2018-11-18 12:06:52,921 INFO L226 Difference]: Without dead ends: 1262 [2018-11-18 12:06:52,923 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 12:06:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2018-11-18 12:06:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1169. [2018-11-18 12:06:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1169 states. [2018-11-18 12:06:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1368 transitions. [2018-11-18 12:06:52,968 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1368 transitions. Word has length 199 [2018-11-18 12:06:52,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:52,968 INFO L480 AbstractCegarLoop]: Abstraction has 1169 states and 1368 transitions. [2018-11-18 12:06:52,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 12:06:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1368 transitions. [2018-11-18 12:06:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-18 12:06:52,970 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:52,971 INFO L375 BasicCegarLoop]: trace histogram [46, 44, 44, 43, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:52,971 INFO L423 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:52,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:52,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2016726016, now seen corresponding path program 6 times [2018-11-18 12:06:52,971 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:52,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:52,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:52,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:52,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 2030 proven. 968 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2018-11-18 12:06:53,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:53,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:53,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:06:53,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-18 12:06:53,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:53,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 88 proven. 2031 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2018-11-18 12:06:53,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:53,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2018-11-18 12:06:53,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-18 12:06:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-18 12:06:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 12:06:53,404 INFO L87 Difference]: Start difference. First operand 1169 states and 1368 transitions. Second operand 33 states. [2018-11-18 12:06:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:54,414 INFO L93 Difference]: Finished difference Result 2666 states and 3135 transitions. [2018-11-18 12:06:54,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-18 12:06:54,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 207 [2018-11-18 12:06:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:54,422 INFO L225 Difference]: With dead ends: 2666 [2018-11-18 12:06:54,422 INFO L226 Difference]: Without dead ends: 1751 [2018-11-18 12:06:54,424 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1567, Invalid=4753, Unknown=0, NotChecked=0, Total=6320 [2018-11-18 12:06:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2018-11-18 12:06:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1566. [2018-11-18 12:06:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1566 states. [2018-11-18 12:06:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1846 transitions. [2018-11-18 12:06:54,509 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1846 transitions. Word has length 207 [2018-11-18 12:06:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:54,510 INFO L480 AbstractCegarLoop]: Abstraction has 1566 states and 1846 transitions. [2018-11-18 12:06:54,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-18 12:06:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1846 transitions. [2018-11-18 12:06:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-18 12:06:54,512 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:54,512 INFO L375 BasicCegarLoop]: trace histogram [49, 47, 47, 45, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:54,513 INFO L423 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:54,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:54,513 INFO L82 PathProgramCache]: Analyzing trace with hash 617602475, now seen corresponding path program 1 times [2018-11-18 12:06:54,513 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:54,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:54,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:54,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:54,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4521 backedges. 2308 proven. 1058 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-11-18 12:06:54,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:54,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:54,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:54,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4521 backedges. 2306 proven. 1058 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-11-18 12:06:54,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:54,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-18 12:06:54,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 12:06:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 12:06:54,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:06:54,832 INFO L87 Difference]: Start difference. First operand 1566 states and 1846 transitions. Second operand 26 states. [2018-11-18 12:06:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:55,004 INFO L93 Difference]: Finished difference Result 3037 states and 3582 transitions. [2018-11-18 12:06:55,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 12:06:55,005 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2018-11-18 12:06:55,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:55,008 INFO L225 Difference]: With dead ends: 3037 [2018-11-18 12:06:55,009 INFO L226 Difference]: Without dead ends: 1745 [2018-11-18 12:06:55,011 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:06:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2018-11-18 12:06:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1542. [2018-11-18 12:06:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2018-11-18 12:06:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1816 transitions. [2018-11-18 12:06:55,088 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1816 transitions. Word has length 219 [2018-11-18 12:06:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:55,088 INFO L480 AbstractCegarLoop]: Abstraction has 1542 states and 1816 transitions. [2018-11-18 12:06:55,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 12:06:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1816 transitions. [2018-11-18 12:06:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-11-18 12:06:55,091 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:55,091 INFO L375 BasicCegarLoop]: trace histogram [50, 48, 48, 46, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:55,091 INFO L423 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:55,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:55,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1865149124, now seen corresponding path program 2 times [2018-11-18 12:06:55,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:55,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:55,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:55,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:06:55,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4713 backedges. 2406 proven. 1152 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-11-18 12:06:55,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:55,385 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/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 [2018-11-18 12:06:55,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 12:06:55,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 12:06:55,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:55,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4713 backedges. 7 proven. 3480 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2018-11-18 12:06:55,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:55,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2018-11-18 12:06:55,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 12:06:55,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 12:06:55,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:06:55,587 INFO L87 Difference]: Start difference. First operand 1542 states and 1816 transitions. Second operand 29 states. [2018-11-18 12:06:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:56,053 INFO L93 Difference]: Finished difference Result 3103 states and 3700 transitions. [2018-11-18 12:06:56,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-18 12:06:56,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 223 [2018-11-18 12:06:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:56,058 INFO L225 Difference]: With dead ends: 3103 [2018-11-18 12:06:56,058 INFO L226 Difference]: Without dead ends: 1855 [2018-11-18 12:06:56,060 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1056, Invalid=1806, Unknown=0, NotChecked=0, Total=2862 [2018-11-18 12:06:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2018-11-18 12:06:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1051. [2018-11-18 12:06:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2018-11-18 12:06:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1265 transitions. [2018-11-18 12:06:56,148 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1265 transitions. Word has length 223 [2018-11-18 12:06:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:56,148 INFO L480 AbstractCegarLoop]: Abstraction has 1051 states and 1265 transitions. [2018-11-18 12:06:56,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 12:06:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1265 transitions. [2018-11-18 12:06:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-11-18 12:06:56,150 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:56,150 INFO L375 BasicCegarLoop]: trace histogram [52, 50, 50, 48, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:56,150 INFO L423 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:56,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1689072028, now seen corresponding path program 3 times [2018-11-18 12:06:56,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:56,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:56,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:56,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:56,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 2606 proven. 1250 refuted. 0 times theorem prover too weak. 1253 trivial. 0 not checked. [2018-11-18 12:06:56,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:56,470 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:06:56,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:06:56,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:06:56,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:56,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5109 backedges. 100 proven. 2607 refuted. 0 times theorem prover too weak. 2402 trivial. 0 not checked. [2018-11-18 12:06:56,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:56,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2018-11-18 12:06:56,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 12:06:56,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 12:06:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=862, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 12:06:56,713 INFO L87 Difference]: Start difference. First operand 1051 states and 1265 transitions. Second operand 36 states. [2018-11-18 12:06:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:58,172 INFO L93 Difference]: Finished difference Result 2155 states and 2604 transitions. [2018-11-18 12:06:58,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-11-18 12:06:58,173 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 231 [2018-11-18 12:06:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:58,175 INFO L225 Difference]: With dead ends: 2155 [2018-11-18 12:06:58,175 INFO L226 Difference]: Without dead ends: 1344 [2018-11-18 12:06:58,177 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3124, Invalid=10216, Unknown=0, NotChecked=0, Total=13340 [2018-11-18 12:06:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2018-11-18 12:06:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1176. [2018-11-18 12:06:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2018-11-18 12:06:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1417 transitions. [2018-11-18 12:06:58,284 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1417 transitions. Word has length 231 [2018-11-18 12:06:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:58,285 INFO L480 AbstractCegarLoop]: Abstraction has 1176 states and 1417 transitions. [2018-11-18 12:06:58,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 12:06:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1417 transitions. [2018-11-18 12:06:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-18 12:06:58,287 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:58,287 INFO L375 BasicCegarLoop]: trace histogram [81, 78, 78, 78, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:58,288 INFO L423 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:58,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:58,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1499059803, now seen corresponding path program 4 times [2018-11-18 12:06:58,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:58,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:58,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:58,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:58,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12509 backedges. 5628 proven. 1352 refuted. 0 times theorem prover too weak. 5529 trivial. 0 not checked. [2018-11-18 12:06:58,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:58,672 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:06:58,678 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 12:06:58,722 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 12:06:58,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:58,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12509 backedges. 5624 proven. 1352 refuted. 0 times theorem prover too weak. 5533 trivial. 0 not checked. [2018-11-18 12:06:58,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:58,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-18 12:06:58,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-18 12:06:58,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-18 12:06:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:06:58,806 INFO L87 Difference]: Start difference. First operand 1176 states and 1417 transitions. Second operand 29 states. [2018-11-18 12:06:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:58,969 INFO L93 Difference]: Finished difference Result 2261 states and 2728 transitions. [2018-11-18 12:06:58,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 12:06:58,969 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 354 [2018-11-18 12:06:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:58,972 INFO L225 Difference]: With dead ends: 2261 [2018-11-18 12:06:58,972 INFO L226 Difference]: Without dead ends: 1340 [2018-11-18 12:06:58,973 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-18 12:06:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2018-11-18 12:06:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1033. [2018-11-18 12:06:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2018-11-18 12:06:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1238 transitions. [2018-11-18 12:06:59,032 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1238 transitions. Word has length 354 [2018-11-18 12:06:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:59,032 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 1238 transitions. [2018-11-18 12:06:59,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-18 12:06:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1238 transitions. [2018-11-18 12:06:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-11-18 12:06:59,034 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:59,034 INFO L375 BasicCegarLoop]: trace histogram [84, 81, 81, 81, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:59,034 INFO L423 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:59,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash -617878334, now seen corresponding path program 5 times [2018-11-18 12:06:59,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:59,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:59,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:59,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:59,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:06:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13475 backedges. 6060 proven. 1458 refuted. 0 times theorem prover too weak. 5957 trivial. 0 not checked. [2018-11-18 12:06:59,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:06:59,329 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:06:59,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 12:06:59,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-11-18 12:06:59,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:06:59,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:06:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13475 backedges. 6056 proven. 1458 refuted. 0 times theorem prover too weak. 5961 trivial. 0 not checked. [2018-11-18 12:06:59,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:06:59,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-18 12:06:59,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-18 12:06:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-18 12:06:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:06:59,470 INFO L87 Difference]: Start difference. First operand 1033 states and 1238 transitions. Second operand 30 states. [2018-11-18 12:06:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:06:59,613 INFO L93 Difference]: Finished difference Result 1909 states and 2289 transitions. [2018-11-18 12:06:59,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-18 12:06:59,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 366 [2018-11-18 12:06:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:06:59,615 INFO L225 Difference]: With dead ends: 1909 [2018-11-18 12:06:59,615 INFO L226 Difference]: Without dead ends: 1147 [2018-11-18 12:06:59,616 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-18 12:06:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2018-11-18 12:06:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1081. [2018-11-18 12:06:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1081 states. [2018-11-18 12:06:59,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1298 transitions. [2018-11-18 12:06:59,678 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1298 transitions. Word has length 366 [2018-11-18 12:06:59,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:06:59,678 INFO L480 AbstractCegarLoop]: Abstraction has 1081 states and 1298 transitions. [2018-11-18 12:06:59,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-18 12:06:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1298 transitions. [2018-11-18 12:06:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-11-18 12:06:59,681 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:06:59,681 INFO L375 BasicCegarLoop]: trace histogram [87, 84, 84, 84, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:06:59,681 INFO L423 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:06:59,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:06:59,682 INFO L82 PathProgramCache]: Analyzing trace with hash 914677929, now seen corresponding path program 6 times [2018-11-18 12:06:59,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 12:06:59,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 12:06:59,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:59,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:06:59,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:06:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:07:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14477 backedges. 6508 proven. 1568 refuted. 0 times theorem prover too weak. 6401 trivial. 0 not checked. [2018-11-18 12:07:00,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:07:00,270 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:07:00,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 12:07:00,306 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-18 12:07:00,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:07:00,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:07:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14477 backedges. 6626 proven. 1 refuted. 0 times theorem prover too weak. 7850 trivial. 0 not checked. [2018-11-18 12:07:00,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:07:00,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2018-11-18 12:07:00,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-18 12:07:00,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-18 12:07:00,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2018-11-18 12:07:00,499 INFO L87 Difference]: Start difference. First operand 1081 states and 1298 transitions. Second operand 39 states. [2018-11-18 12:07:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:07:01,060 INFO L93 Difference]: Finished difference Result 2023 states and 2436 transitions. [2018-11-18 12:07:01,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-18 12:07:01,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 378 [2018-11-18 12:07:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:07:01,061 INFO L225 Difference]: With dead ends: 2023 [2018-11-18 12:07:01,061 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:07:01,063 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1479, Invalid=3213, Unknown=0, NotChecked=0, Total=4692 [2018-11-18 12:07:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:07:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:07:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:07:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:07:01,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 378 [2018-11-18 12:07:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:07:01,064 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:07:01,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-18 12:07:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:07:01,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:07:01,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 12:07:03,065 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,478 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,645 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,780 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,785 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,803 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,811 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,813 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,822 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,827 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,827 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,829 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,835 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,840 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,856 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,881 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,882 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,882 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,920 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,925 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,930 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,979 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:03,986 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,010 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,022 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,036 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,039 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,055 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,058 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,064 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,070 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,114 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,171 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,174 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,177 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,265 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,270 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,281 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,294 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,306 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,344 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,363 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,414 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,467 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 12:07:04,567 WARN L180 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 1563 DAG size of output: 658 [2018-11-18 12:07:06,519 WARN L180 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 605 DAG size of output: 19 [2018-11-18 12:07:06,564 INFO L425 ceAbstractionStarter]: For program point nondetFINAL(lines 15 19) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L428 ceAbstractionStarter]: At program point nondetENTRY(lines 15 19) the Hoare annotation is: true [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point nondetEXIT(lines 15 19) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L421 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (<= ~last~0 6) [2018-11-18 12:07:06,565 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L421 ceAbstractionStarter]: At program point L33(lines 24 34) the Hoare annotation is: (or (and (= main_~b~0 main_~a~0) (<= 200000 main_~c~0) (<= main_~c~0 200000)) (< 6 |old(~last~0)|) (and (= main_~b~0 0) (= main_~c~0 0) (= main_~a~0 0))) [2018-11-18 12:07:06,565 INFO L421 ceAbstractionStarter]: At program point L31-1(lines 31 32) the Hoare annotation is: (or (and (= main_~b~0 main_~a~0) (<= 200000 main_~c~0) (<= main_~c~0 200000)) (< 6 |old(~last~0)|)) [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 21 35) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L421 ceAbstractionStarter]: At program point mainENTRY(lines 21 35) the Hoare annotation is: (or (< 6 |old(~last~0)|) (<= ~last~0 6)) [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point L28-1(lines 24 34) no Hoare annotation was computed. [2018-11-18 12:07:06,565 INFO L425 ceAbstractionStarter]: For program point L26-1(lines 26 27) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L24-1(lines 24 34) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L26-3(lines 26 27) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L421 ceAbstractionStarter]: At program point L26-4(lines 26 27) the Hoare annotation is: (let ((.cse0 (= main_~b~0 main_~a~0)) (.cse1 (<= main_~c~0 200000))) (or (and .cse0 .cse1 (<= 1 main_~st~0)) (< 6 |old(~last~0)|) (and .cse0 .cse1 (<= ~last~0 199999)))) [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L26-5(lines 24 34) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L24-3(lines 21 35) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 8 13) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L9(lines 9 11) no Hoare annotation was computed. [2018-11-18 12:07:06,566 INFO L425 ceAbstractionStarter]: For program point L9-2(lines 8 13) no Hoare annotation was computed. [2018-11-18 12:07:06,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:07:06 BoogieIcfgContainer [2018-11-18 12:07:06,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:07:06,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:07:06,579 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:07:06,579 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:07:06,581 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:06:43" (3/4) ... [2018-11-18 12:07:06,584 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:07:06,589 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:07:06,589 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure nondet [2018-11-18 12:07:06,590 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:07:06,590 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 12:07:06,592 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2018-11-18 12:07:06,593 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-18 12:07:06,616 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((b == a && 200000 <= c) && c <= 200000) || 6 < \old(last)) || ((b == 0 && c == 0) && a == 0) [2018-11-18 12:07:06,616 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((b == a && c <= 200000) && 1 <= st) || 6 < \old(last)) || ((b == a && c <= 200000) && last <= 199999) [2018-11-18 12:07:06,628 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_468af234-86bd-4ebf-85e5-86cac275a63c/bin-2019/uautomizer/witness.graphml [2018-11-18 12:07:06,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:07:06,629 INFO L168 Benchmark]: Toolchain (without parser) took 24026.20 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 716.2 MB). Free memory was 961.9 MB in the beginning and 1.0 GB in the end (delta: -69.8 MB). Peak memory consumption was 646.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:07:06,629 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:07:06,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.47 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:07:06,630 INFO L168 Benchmark]: Boogie Preprocessor took 25.15 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:07:06,630 INFO L168 Benchmark]: RCFGBuilder took 234.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -173.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:07:06,630 INFO L168 Benchmark]: TraceAbstraction took 23561.08 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 584.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 87.7 MB). Peak memory consumption was 805.3 MB. Max. memory is 11.5 GB. [2018-11-18 12:07:06,631 INFO L168 Benchmark]: Witness Printer took 49.01 ms. Allocated memory is still 1.7 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 50.5 kB). Peak memory consumption was 50.5 kB. Max. memory is 11.5 GB. [2018-11-18 12:07:06,633 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 152.47 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.15 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 234.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -173.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 23561.08 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 584.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 87.7 MB). Peak memory consumption was 805.3 MB. Max. memory is 11.5 GB. * Witness Printer took 49.01 ms. Allocated memory is still 1.7 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 50.5 kB). Peak memory consumption was 50.5 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((b == a && c <= 200000) && 1 <= st) || 6 < \old(last)) || ((b == a && c <= 200000) && last <= 199999) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((b == a && 200000 <= c) && c <= 200000) || 6 < \old(last)) || ((b == 0 && c == 0) && a == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. SAFE Result, 23.4s OverallTime, 28 OverallIterations, 87 TraceHistogramMax, 9.1s AutomataDifference, 0.0s DeadEndRemovalTime, 5.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 816 SDtfs, 2775 SDslu, 9448 SDs, 0 SdLazy, 10611 SolverSat, 327 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4631 GetRequests, 3778 SyntacticMatches, 0 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11733 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1566occurred in iteration=22, 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: 0.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 2548 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 179 PreInvPairs, 489 NumberOfFragments, 80 HoareAnnotationTreeSize, 179 FomulaSimplifications, 137869055 FormulaSimplificationTreeSizeReduction, 3.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1147021 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 7703 NumberOfCodeBlocks, 6544 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 7650 ConstructedInterpolants, 0 QuantifiedInterpolants, 3889055 SizeOfPredicates, 53 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 491 ConjunctsInUnsatCore, 53 InterpolantComputations, 7 PerfectInterpolantSequences, 124960/161058 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...