./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/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 a5caa00ae79e87f00b53813a39ed64b4be57c6c3 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 12:12:27,343 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 12:12:27,344 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 12:12:27,351 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 12:12:27,351 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 12:12:27,352 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 12:12:27,353 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 12:12:27,354 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 12:12:27,355 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 12:12:27,355 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 12:12:27,356 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 12:12:27,356 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 12:12:27,357 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 12:12:27,357 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 12:12:27,358 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 12:12:27,359 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 12:12:27,359 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 12:12:27,360 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 12:12:27,362 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 12:12:27,363 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 12:12:27,363 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 12:12:27,364 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 12:12:27,365 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 12:12:27,366 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 12:12:27,366 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 12:12:27,366 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 12:12:27,367 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 12:12:27,367 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 12:12:27,368 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 12:12:27,369 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 12:12:27,369 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 12:12:27,369 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 12:12:27,369 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 12:12:27,370 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 12:12:27,370 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 12:12:27,371 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 12:12:27,371 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 12:12:27,381 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 12:12:27,381 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 12:12:27,381 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 12:12:27,382 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 12:12:27,382 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 12:12:27,382 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 12:12:27,382 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 12:12:27,383 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 12:12:27,383 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 12:12:27,384 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 12:12:27,384 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 12:12:27,384 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 12:12:27,384 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 12:12:27,384 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 12:12:27,384 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 12:12:27,384 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 12:12:27,385 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 12:12:27,385 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 12:12:27,385 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 12:12:27,385 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 12:12:27,385 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 12:12:27,385 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 12:12:27,386 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 12:12:27,386 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_6686901d-ce17-4434-85ab-056726107592/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 -> a5caa00ae79e87f00b53813a39ed64b4be57c6c3 [2018-11-23 12:12:27,408 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 12:12:27,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 12:12:27,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 12:12:27,419 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 12:12:27,420 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 12:12:27,420 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/../../sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.i [2018-11-23 12:12:27,454 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/data/0f5cae03d/1d6a1ca8331044a18f28ea2e1b4bd571/FLAGa2aad00bf [2018-11-23 12:12:27,838 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 12:12:27,839 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/sv-benchmarks/c/loop-acceleration/nested_true-unreach-call1.i [2018-11-23 12:12:27,842 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/data/0f5cae03d/1d6a1ca8331044a18f28ea2e1b4bd571/FLAGa2aad00bf [2018-11-23 12:12:27,850 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/data/0f5cae03d/1d6a1ca8331044a18f28ea2e1b4bd571 [2018-11-23 12:12:27,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 12:12:27,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 12:12:27,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 12:12:27,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 12:12:27,856 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 12:12:27,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:27,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9ee6b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27, skipping insertion in model container [2018-11-23 12:12:27,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:27,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 12:12:27,875 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 12:12:27,975 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:12:27,977 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 12:12:27,986 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:12:27,993 INFO L195 MainTranslator]: Completed translation [2018-11-23 12:12:27,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27 WrapperNode [2018-11-23 12:12:27,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 12:12:27,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 12:12:27,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 12:12:27,994 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 12:12:27,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 12:12:28,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 12:12:28,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 12:12:28,006 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 12:12:28,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... [2018-11-23 12:12:28,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 12:12:28,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 12:12:28,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 12:12:28,019 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 12:12:28,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 12:12:28,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 12:12:28,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 12:12:28,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 12:12:28,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 12:12:28,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 12:12:28,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 12:12:28,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 12:12:28,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 12:12:28,198 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 12:12:28,199 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-23 12:12:28,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:12:28 BoogieIcfgContainer [2018-11-23 12:12:28,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 12:12:28,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 12:12:28,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 12:12:28,202 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 12:12:28,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:12:27" (1/3) ... [2018-11-23 12:12:28,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d089a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:12:28, skipping insertion in model container [2018-11-23 12:12:28,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:12:27" (2/3) ... [2018-11-23 12:12:28,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d089a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:12:28, skipping insertion in model container [2018-11-23 12:12:28,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:12:28" (3/3) ... [2018-11-23 12:12:28,205 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call1.i [2018-11-23 12:12:28,213 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 12:12:28,218 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 12:12:28,230 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 12:12:28,255 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 12:12:28,256 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 12:12:28,256 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 12:12:28,256 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 12:12:28,256 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 12:12:28,256 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 12:12:28,256 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 12:12:28,256 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 12:12:28,256 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 12:12:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-23 12:12:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-23 12:12:28,275 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:28,276 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:28,277 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:28,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:28,282 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2018-11-23 12:12:28,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:28,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:28,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:28,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:12:28,410 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:12:28,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 12:12:28,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-23 12:12:28,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 12:12:28,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 12:12:28,422 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-11-23 12:12:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:28,441 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2018-11-23 12:12:28,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 12:12:28,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-23 12:12:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:28,447 INFO L225 Difference]: With dead ends: 36 [2018-11-23 12:12:28,447 INFO L226 Difference]: Without dead ends: 16 [2018-11-23 12:12:28,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 12:12:28,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-23 12:12:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2018-11-23 12:12:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-23 12:12:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-23 12:12:28,470 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-23 12:12:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:28,471 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-23 12:12:28,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-23 12:12:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-23 12:12:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 12:12:28,471 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:28,471 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:28,472 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:28,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:28,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2018-11-23 12:12:28,472 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:28,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:28,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:28,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:12:28,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:12:28,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 12:12:28,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-23 12:12:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 12:12:28,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 12:12:28,526 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-11-23 12:12:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:28,537 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2018-11-23 12:12:28,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 12:12:28,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-23 12:12:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:28,539 INFO L225 Difference]: With dead ends: 23 [2018-11-23 12:12:28,539 INFO L226 Difference]: Without dead ends: 15 [2018-11-23 12:12:28,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 12:12:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-23 12:12:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-23 12:12:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-23 12:12:28,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-23 12:12:28,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-11-23 12:12:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-23 12:12:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-23 12:12:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-23 12:12:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 12:12:28,544 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:28,545 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:28,545 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:28,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2018-11-23 12:12:28,545 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:28,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:28,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:28,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:12:28,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:28,595 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:28,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:28,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:12:28,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:28,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2018-11-23 12:12:28,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 12:12:28,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 12:12:28,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-23 12:12:28,694 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-11-23 12:12:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:28,750 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2018-11-23 12:12:28,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 12:12:28,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-11-23 12:12:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:28,751 INFO L225 Difference]: With dead ends: 34 [2018-11-23 12:12:28,751 INFO L226 Difference]: Without dead ends: 25 [2018-11-23 12:12:28,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-23 12:12:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-23 12:12:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-11-23 12:12:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 12:12:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-11-23 12:12:28,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2018-11-23 12:12:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:28,756 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-11-23 12:12:28,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 12:12:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-11-23 12:12:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-23 12:12:28,757 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:28,757 INFO L402 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:28,757 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:28,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash 93409041, now seen corresponding path program 2 times [2018-11-23 12:12:28,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:28,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:28,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:28,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 12:12:28,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:28,830 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:28,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:12:28,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:12:28,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:28,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-23 12:12:28,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:28,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-23 12:12:28,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 12:12:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 12:12:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-23 12:12:28,901 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-11-23 12:12:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:29,029 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-11-23 12:12:29,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 12:12:29,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-23 12:12:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:29,030 INFO L225 Difference]: With dead ends: 46 [2018-11-23 12:12:29,030 INFO L226 Difference]: Without dead ends: 34 [2018-11-23 12:12:29,031 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-11-23 12:12:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-23 12:12:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2018-11-23 12:12:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-23 12:12:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-11-23 12:12:29,036 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2018-11-23 12:12:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:29,036 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-11-23 12:12:29,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 12:12:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-11-23 12:12:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-23 12:12:29,037 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:29,037 INFO L402 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:29,037 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:29,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash 50981508, now seen corresponding path program 3 times [2018-11-23 12:12:29,038 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:29,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:29,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:29,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:29,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-23 12:12:29,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:29,123 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:29,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:12:29,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-23 12:12:29,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:29,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-23 12:12:29,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:29,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-23 12:12:29,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 12:12:29,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 12:12:29,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-23 12:12:29,217 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2018-11-23 12:12:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:29,251 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2018-11-23 12:12:29,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 12:12:29,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-11-23 12:12:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:29,252 INFO L225 Difference]: With dead ends: 51 [2018-11-23 12:12:29,252 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 12:12:29,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-23 12:12:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 12:12:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-23 12:12:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-23 12:12:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-11-23 12:12:29,258 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2018-11-23 12:12:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:29,258 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-11-23 12:12:29,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 12:12:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-11-23 12:12:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-23 12:12:29,259 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:29,259 INFO L402 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:29,259 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:29,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1418818136, now seen corresponding path program 4 times [2018-11-23 12:12:29,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:29,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:29,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:29,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:29,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-23 12:12:29,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:29,347 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:29,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:12:29,378 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:12:29,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:29,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 12:12:29,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:29,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2018-11-23 12:12:29,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 12:12:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 12:12:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-23 12:12:29,462 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2018-11-23 12:12:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:29,540 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-11-23 12:12:29,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 12:12:29,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-23 12:12:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:29,541 INFO L225 Difference]: With dead ends: 50 [2018-11-23 12:12:29,541 INFO L226 Difference]: Without dead ends: 45 [2018-11-23 12:12:29,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-23 12:12:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-23 12:12:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2018-11-23 12:12:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 12:12:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-11-23 12:12:29,550 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2018-11-23 12:12:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:29,550 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-11-23 12:12:29,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 12:12:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-11-23 12:12:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-23 12:12:29,551 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:29,551 INFO L402 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:29,551 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:29,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:29,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1027694321, now seen corresponding path program 5 times [2018-11-23 12:12:29,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:29,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:29,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-23 12:12:29,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:29,647 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:29,660 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:12:29,684 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-23 12:12:29,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:29,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-11-23 12:12:29,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:29,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-23 12:12:29,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 12:12:29,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 12:12:29,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-11-23 12:12:29,764 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2018-11-23 12:12:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:30,111 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2018-11-23 12:12:30,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-23 12:12:30,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2018-11-23 12:12:30,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:30,112 INFO L225 Difference]: With dead ends: 86 [2018-11-23 12:12:30,112 INFO L226 Difference]: Without dead ends: 58 [2018-11-23 12:12:30,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 12:12:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-23 12:12:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2018-11-23 12:12:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-23 12:12:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2018-11-23 12:12:30,123 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2018-11-23 12:12:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:30,124 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2018-11-23 12:12:30,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 12:12:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2018-11-23 12:12:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-23 12:12:30,126 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:30,126 INFO L402 BasicCegarLoop]: trace histogram [25, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:30,128 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:30,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:30,128 INFO L82 PathProgramCache]: Analyzing trace with hash 79747558, now seen corresponding path program 6 times [2018-11-23 12:12:30,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:30,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:30,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:30,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:30,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-11-23 12:12:30,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:30,237 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:30,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:12:30,395 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-11-23 12:12:30,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:30,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 264 proven. 15 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-23 12:12:30,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:30,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-11-23 12:12:30,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 12:12:30,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 12:12:30,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-11-23 12:12:30,448 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 14 states. [2018-11-23 12:12:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:30,861 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2018-11-23 12:12:30,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-23 12:12:30,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-11-23 12:12:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:30,862 INFO L225 Difference]: With dead ends: 112 [2018-11-23 12:12:30,862 INFO L226 Difference]: Without dead ends: 73 [2018-11-23 12:12:30,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2018-11-23 12:12:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-23 12:12:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2018-11-23 12:12:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-23 12:12:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2018-11-23 12:12:30,873 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 50 [2018-11-23 12:12:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:30,873 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2018-11-23 12:12:30,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 12:12:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2018-11-23 12:12:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-23 12:12:30,874 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:30,874 INFO L402 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:30,874 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:30,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash -849358255, now seen corresponding path program 7 times [2018-11-23 12:12:30,875 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:30,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:30,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:30,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:30,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 771 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-23 12:12:31,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:31,008 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:31,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:31,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 792 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-23 12:12:31,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:31,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 16 [2018-11-23 12:12:31,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 12:12:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 12:12:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:12:31,142 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 16 states. [2018-11-23 12:12:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:31,265 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2018-11-23 12:12:31,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 12:12:31,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2018-11-23 12:12:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:31,267 INFO L225 Difference]: With dead ends: 87 [2018-11-23 12:12:31,267 INFO L226 Difference]: Without dead ends: 82 [2018-11-23 12:12:31,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:12:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-11-23 12:12:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2018-11-23 12:12:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-23 12:12:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-11-23 12:12:31,277 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2018-11-23 12:12:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:31,277 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-11-23 12:12:31,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 12:12:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-11-23 12:12:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-23 12:12:31,278 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:31,278 INFO L402 BasicCegarLoop]: trace histogram [42, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:31,279 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:31,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1645944296, now seen corresponding path program 8 times [2018-11-23 12:12:31,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:31,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:31,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:31,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:31,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1078 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-11-23 12:12:31,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:31,388 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:31,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:12:31,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:12:31,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:31,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1078 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-11-23 12:12:31,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:31,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-23 12:12:31,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 12:12:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 12:12:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-23 12:12:31,477 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 11 states. [2018-11-23 12:12:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:31,549 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2018-11-23 12:12:31,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 12:12:31,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2018-11-23 12:12:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:31,550 INFO L225 Difference]: With dead ends: 96 [2018-11-23 12:12:31,550 INFO L226 Difference]: Without dead ends: 91 [2018-11-23 12:12:31,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-23 12:12:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-23 12:12:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2018-11-23 12:12:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-23 12:12:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2018-11-23 12:12:31,561 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 73 [2018-11-23 12:12:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:31,561 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2018-11-23 12:12:31,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 12:12:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2018-11-23 12:12:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-23 12:12:31,563 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:31,564 INFO L402 BasicCegarLoop]: trace histogram [48, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:31,564 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:31,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash -977821135, now seen corresponding path program 9 times [2018-11-23 12:12:31,564 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:31,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:31,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:31,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:31,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 0 proven. 1436 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-11-23 12:12:31,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:31,669 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:31,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:12:31,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-23 12:12:31,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:31,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1604 backedges. 358 proven. 21 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2018-11-23 12:12:31,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:31,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2018-11-23 12:12:31,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 12:12:31,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 12:12:31,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2018-11-23 12:12:31,795 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 18 states. [2018-11-23 12:12:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:32,735 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2018-11-23 12:12:32,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-11-23 12:12:32,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-11-23 12:12:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:32,736 INFO L225 Difference]: With dead ends: 180 [2018-11-23 12:12:32,736 INFO L226 Difference]: Without dead ends: 110 [2018-11-23 12:12:32,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=6075, Unknown=0, NotChecked=0, Total=6480 [2018-11-23 12:12:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-11-23 12:12:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2018-11-23 12:12:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-11-23 12:12:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2018-11-23 12:12:32,750 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 82 [2018-11-23 12:12:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:32,750 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2018-11-23 12:12:32,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 12:12:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2018-11-23 12:12:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-11-23 12:12:32,751 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:32,752 INFO L402 BasicCegarLoop]: trace histogram [63, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:32,753 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:32,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:32,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1823829354, now seen corresponding path program 10 times [2018-11-23 12:12:32,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:32,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:32,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:32,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:32,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2637 backedges. 0 proven. 2385 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-23 12:12:32,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:32,871 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:32,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:12:32,910 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:12:32,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:32,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2637 backedges. 521 proven. 28 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-11-23 12:12:33,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:33,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2018-11-23 12:12:33,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 12:12:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 12:12:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-11-23 12:12:33,005 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand 20 states. [2018-11-23 12:12:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:34,213 INFO L93 Difference]: Finished difference Result 218 states and 249 transitions. [2018-11-23 12:12:34,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-11-23 12:12:34,214 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2018-11-23 12:12:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:34,214 INFO L225 Difference]: With dead ends: 218 [2018-11-23 12:12:34,214 INFO L226 Difference]: Without dead ends: 131 [2018-11-23 12:12:34,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=510, Invalid=9390, Unknown=0, NotChecked=0, Total=9900 [2018-11-23 12:12:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-23 12:12:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2018-11-23 12:12:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-23 12:12:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2018-11-23 12:12:34,231 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 100 [2018-11-23 12:12:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:34,231 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2018-11-23 12:12:34,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 12:12:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2018-11-23 12:12:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-11-23 12:12:34,234 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:34,234 INFO L402 BasicCegarLoop]: trace histogram [80, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:34,234 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:34,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -239880495, now seen corresponding path program 11 times [2018-11-23 12:12:34,235 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:34,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:34,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:34,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4105 backedges. 0 proven. 3745 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2018-11-23 12:12:34,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:34,404 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:34,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 12:12:34,570 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-23 12:12:34,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:34,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4105 backedges. 2236 proven. 36 refuted. 0 times theorem prover too weak. 1833 trivial. 0 not checked. [2018-11-23 12:12:34,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:34,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2018-11-23 12:12:34,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-23 12:12:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-23 12:12:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-11-23 12:12:34,686 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 22 states. [2018-11-23 12:12:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:36,179 INFO L93 Difference]: Finished difference Result 260 states and 294 transitions. [2018-11-23 12:12:36,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-11-23 12:12:36,179 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 120 [2018-11-23 12:12:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:36,180 INFO L225 Difference]: With dead ends: 260 [2018-11-23 12:12:36,180 INFO L226 Difference]: Without dead ends: 154 [2018-11-23 12:12:36,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4860 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=627, Invalid=13893, Unknown=0, NotChecked=0, Total=14520 [2018-11-23 12:12:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-11-23 12:12:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2018-11-23 12:12:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-11-23 12:12:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2018-11-23 12:12:36,194 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 120 [2018-11-23 12:12:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:36,195 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2018-11-23 12:12:36,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-23 12:12:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2018-11-23 12:12:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-23 12:12:36,196 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:36,196 INFO L402 BasicCegarLoop]: trace histogram [99, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:36,196 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:36,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:36,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1269394804, now seen corresponding path program 12 times [2018-11-23 12:12:36,197 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:36,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:36,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:36,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:36,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6116 backedges. 0 proven. 5621 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-23 12:12:36,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:36,426 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:36,433 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 12:12:37,690 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-11-23 12:12:37,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:37,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6116 backedges. 3463 proven. 45 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2018-11-23 12:12:37,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:37,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2018-11-23 12:12:37,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-23 12:12:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 12:12:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2018-11-23 12:12:37,815 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 24 states. [2018-11-23 12:12:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:39,642 INFO L93 Difference]: Finished difference Result 306 states and 343 transitions. [2018-11-23 12:12:39,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-11-23 12:12:39,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 142 [2018-11-23 12:12:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:39,643 INFO L225 Difference]: With dead ends: 306 [2018-11-23 12:12:39,643 INFO L226 Difference]: Without dead ends: 179 [2018-11-23 12:12:39,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7150 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=756, Invalid=19836, Unknown=0, NotChecked=0, Total=20592 [2018-11-23 12:12:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-23 12:12:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2018-11-23 12:12:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-11-23 12:12:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2018-11-23 12:12:39,662 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 142 [2018-11-23 12:12:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:39,662 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2018-11-23 12:12:39,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-23 12:12:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2018-11-23 12:12:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-11-23 12:12:39,663 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:39,663 INFO L402 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:39,664 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:39,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1125925135, now seen corresponding path program 13 times [2018-11-23 12:12:39,664 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:39,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:39,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:39,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:39,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-11-23 12:12:39,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:39,890 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:39,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:39,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-11-23 12:12:40,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:40,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-23 12:12:40,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 12:12:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 12:12:40,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:12:40,044 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 16 states. [2018-11-23 12:12:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:40,185 INFO L93 Difference]: Finished difference Result 197 states and 211 transitions. [2018-11-23 12:12:40,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 12:12:40,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 166 [2018-11-23 12:12:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:40,186 INFO L225 Difference]: With dead ends: 197 [2018-11-23 12:12:40,186 INFO L226 Difference]: Without dead ends: 192 [2018-11-23 12:12:40,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-11-23 12:12:40,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-23 12:12:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2018-11-23 12:12:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-11-23 12:12:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2018-11-23 12:12:40,201 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 166 [2018-11-23 12:12:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:40,202 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2018-11-23 12:12:40,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 12:12:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2018-11-23 12:12:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-11-23 12:12:40,202 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:40,203 INFO L402 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:40,203 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:40,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1024998408, now seen corresponding path program 14 times [2018-11-23 12:12:40,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:40,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:40,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:12:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-11-23 12:12:40,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:40,491 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:40,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:12:40,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:12:40,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:40,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-11-23 12:12:40,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:12:40,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-23 12:12:40,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 12:12:40,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 12:12:40,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-23 12:12:40,659 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand 17 states. [2018-11-23 12:12:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:12:40,826 INFO L93 Difference]: Finished difference Result 210 states and 225 transitions. [2018-11-23 12:12:40,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 12:12:40,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 179 [2018-11-23 12:12:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:12:40,828 INFO L225 Difference]: With dead ends: 210 [2018-11-23 12:12:40,828 INFO L226 Difference]: Without dead ends: 205 [2018-11-23 12:12:40,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2018-11-23 12:12:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-11-23 12:12:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2018-11-23 12:12:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-11-23 12:12:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 207 transitions. [2018-11-23 12:12:40,845 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 207 transitions. Word has length 179 [2018-11-23 12:12:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:12:40,845 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 207 transitions. [2018-11-23 12:12:40,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 12:12:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 207 transitions. [2018-11-23 12:12:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-23 12:12:40,846 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:12:40,846 INFO L402 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:12:40,847 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:12:40,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:12:40,847 INFO L82 PathProgramCache]: Analyzing trace with hash 627335761, now seen corresponding path program 15 times [2018-11-23 12:12:40,847 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:12:40,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:12:40,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:40,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:12:40,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:12:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:12:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-11-23 12:12:41,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:12:41,218 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:12:41,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:12:41,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-23 12:12:41,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:12:41,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:12:43,916 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((v_main_~x~0_BEFORE_CALL_1 Int)) (let ((.cse0 (mod v_main_~x~0_BEFORE_CALL_1 2))) (and (<= 268435455 (mod v_main_~x~0_BEFORE_CALL_1 4294967296)) (= .cse0 |c___VERIFIER_assert_#in~cond|) (= .cse0 0) (< (mod (+ v_main_~x~0_BEFORE_CALL_1 4294967295) 4294967296) 268435455) (<= .cse0 2147483647)))) (exists ((v_prenex_5 Int)) (let ((.cse3 (mod v_prenex_5 2))) (let ((.cse1 (mod (+ .cse3 4294967294) 4294967296)) (.cse2 (mod v_prenex_5 4294967296))) (and (<= .cse1 2147483647) (<= 268435455 .cse2) (= |c___VERIFIER_assert_#in~cond| .cse1) (< .cse2 0) (< (mod (+ v_prenex_5 4294967295) 4294967296) 268435455) (not (= .cse3 0)))))) (exists ((v_prenex_4 Int)) (let ((.cse5 (mod v_prenex_4 4294967296)) (.cse4 (mod v_prenex_4 2))) (and (< 2147483647 .cse4) (<= 0 .cse5) (<= 268435455 .cse5) (= (+ |c___VERIFIER_assert_#in~cond| 4294967296) .cse4) (< (mod (+ v_prenex_4 4294967295) 4294967296) 268435455)))) (exists ((v_prenex_3 Int)) (let ((.cse8 (mod v_prenex_3 2))) (let ((.cse7 (mod v_prenex_3 4294967296)) (.cse6 (mod (+ .cse8 4294967294) 4294967296))) (and (= (+ |c___VERIFIER_assert_#in~cond| 4294967296) .cse6) (<= 268435455 .cse7) (< .cse7 0) (< 2147483647 .cse6) (< (mod (+ v_prenex_3 4294967295) 4294967296) 268435455) (not (= .cse8 0)))))) (exists ((v_prenex_1 Int)) (let ((.cse9 (mod v_prenex_1 2))) (and (<= 268435455 (mod v_prenex_1 4294967296)) (< 2147483647 .cse9) (= .cse9 0) (< (mod (+ v_prenex_1 4294967295) 4294967296) 268435455) (= (+ |c___VERIFIER_assert_#in~cond| 4294967296) .cse9)))) (exists ((v_prenex_2 Int)) (let ((.cse10 (mod v_prenex_2 4294967296)) (.cse11 (mod v_prenex_2 2))) (and (<= 0 .cse10) (< (mod (+ v_prenex_2 4294967295) 4294967296) 268435455) (<= .cse11 2147483647) (<= 268435455 .cse10) (= .cse11 |c___VERIFIER_assert_#in~cond|))))) is different from true [2018-11-23 12:12:58,459 WARN L180 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 90 DAG size of output: 19 [2018-11-23 12:13:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 1600 proven. 0 refuted. 0 times theorem prover too weak. 10377 trivial. 0 not checked. [2018-11-23 12:13:00,529 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 12:13:00,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [17] total 22 [2018-11-23 12:13:00,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-23 12:13:00,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-23 12:13:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=337, Unknown=3, NotChecked=38, Total=462 [2018-11-23 12:13:00,531 INFO L87 Difference]: Start difference. First operand 193 states and 207 transitions. Second operand 22 states. [2018-11-23 12:13:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:13:03,018 INFO L93 Difference]: Finished difference Result 222 states and 240 transitions. [2018-11-23 12:13:03,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-23 12:13:03,018 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 192 [2018-11-23 12:13:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:13:03,019 INFO L225 Difference]: With dead ends: 222 [2018-11-23 12:13:03,019 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 12:13:03,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=120, Invalid=387, Unknown=3, NotChecked=42, Total=552 [2018-11-23 12:13:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 12:13:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 12:13:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 12:13:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 12:13:03,020 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 192 [2018-11-23 12:13:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:13:03,020 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 12:13:03,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-23 12:13:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 12:13:03,020 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 12:13:03,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 12:13:03,383 WARN L180 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 75 [2018-11-23 12:13:03,544 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 12:13:03,544 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:13:03,544 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:13:03,544 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 12:13:03,544 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 12:13:03,544 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 12:13:03,544 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 8 19) no Hoare annotation was computed. [2018-11-23 12:13:03,544 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 8 19) no Hoare annotation was computed. [2018-11-23 12:13:03,544 INFO L444 ceAbstractionStarter]: At program point L13-2(lines 13 15) the Hoare annotation is: (or (and (<= main_~x~0 0) (<= 0 main_~x~0)) (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (< (mod main_~x~0 4294967296) 268435455))) [2018-11-23 12:13:03,544 INFO L448 ceAbstractionStarter]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2018-11-23 12:13:03,544 INFO L444 ceAbstractionStarter]: At program point L11-2(lines 11 17) the Hoare annotation is: (or (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (and (<= 0 main_~y~0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0))) [2018-11-23 12:13:03,545 INFO L444 ceAbstractionStarter]: At program point L11-3(lines 11 17) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (<= 268435455 (mod main_~x~0 4294967296))) [2018-11-23 12:13:03,545 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 8 19) the Hoare annotation is: true [2018-11-23 12:13:03,545 INFO L448 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-11-23 12:13:03,545 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-11-23 12:13:03,545 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-11-23 12:13:03,545 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-11-23 12:13:03,545 INFO L448 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-11-23 12:13:03,545 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-11-23 12:13:03,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:13:03 BoogieIcfgContainer [2018-11-23 12:13:03,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 12:13:03,554 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 12:13:03,554 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 12:13:03,554 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 12:13:03,555 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:12:28" (3/4) ... [2018-11-23 12:13:03,557 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 12:13:03,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 12:13:03,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 12:13:03,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 12:13:03,566 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-23 12:13:03,566 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-11-23 12:13:03,566 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 12:13:03,593 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6686901d-ce17-4434-85ab-056726107592/bin-2019/uautomizer/witness.graphml [2018-11-23 12:13:03,593 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 12:13:03,593 INFO L168 Benchmark]: Toolchain (without parser) took 35740.68 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 318.8 MB). Free memory was 959.3 MB in the beginning and 1.2 GB in the end (delta: -239.3 MB). Peak memory consumption was 79.5 MB. Max. memory is 11.5 GB. [2018-11-23 12:13:03,594 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:13:03,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.92 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:13:03,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.91 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:13:03,595 INFO L168 Benchmark]: Boogie Preprocessor took 12.60 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:13:03,595 INFO L168 Benchmark]: RCFGBuilder took 180.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -172.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 12:13:03,596 INFO L168 Benchmark]: TraceAbstraction took 35354.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 186.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -89.7 MB). Peak memory consumption was 442.6 MB. Max. memory is 11.5 GB. [2018-11-23 12:13:03,596 INFO L168 Benchmark]: Witness Printer took 38.80 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2018-11-23 12:13:03,598 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.92 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.91 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.60 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 180.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -172.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 35354.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 186.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -89.7 MB). Peak memory consumption was 442.6 MB. Max. memory is 11.5 GB. * Witness Printer took 38.80 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 268435455 || (((0 <= y && x <= 0) && 0 <= x) && y <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 35.2s OverallTime, 17 OverallIterations, 140 TraceHistogramMax, 9.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 350 SDtfs, 397 SDslu, 3007 SDs, 0 SdLazy, 10239 SolverSat, 580 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1895 GetRequests, 1242 SyntacticMatches, 19 SemanticMatches, 634 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18183 ImplicationChecksByTransitivity, 22.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=193occurred in iteration=16, 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: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 114 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 25 PreInvPairs, 219 NumberOfFragments, 60 HoareAnnotationTreeSize, 25 FomulaSimplifications, 1949749 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 705 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 21.5s InterpolantComputationTime, 2621 NumberOfCodeBlocks, 2193 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2589 ConstructedInterpolants, 2 QuantifiedInterpolants, 1685737 SizeOfPredicates, 18 NumberOfNonLiveVariables, 2338 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 32 InterpolantComputations, 3 PerfectInterpolantSequences, 32597/97099 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...