./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/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 aeade23d65797ff650f62ff8e383f015764d9ed2 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:19:10,234 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:19:10,237 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:19:10,249 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:19:10,250 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:19:10,251 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:19:10,254 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:19:10,255 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:19:10,260 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:19:10,261 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:19:10,262 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:19:10,262 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:19:10,262 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:19:10,263 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:19:10,264 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:19:10,265 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:19:10,266 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:19:10,267 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:19:10,269 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:19:10,270 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:19:10,270 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:19:10,271 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:19:10,273 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:19:10,273 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:19:10,273 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:19:10,274 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:19:10,274 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:19:10,275 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:19:10,276 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:19:10,277 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:19:10,277 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:19:10,278 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:19:10,278 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:19:10,278 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:19:10,279 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:19:10,280 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:19:10,280 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 23:19:10,290 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:19:10,291 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:19:10,291 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:19:10,292 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 23:19:10,292 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 23:19:10,292 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 23:19:10,293 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 23:19:10,293 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:19:10,293 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:19:10,293 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:19:10,293 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:19:10,293 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:19:10,293 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:19:10,293 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:19:10,294 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:19:10,294 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:19:10,294 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:19:10,294 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:19:10,294 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:19:10,294 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:19:10,294 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:19:10,295 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:19:10,295 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:19:10,295 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:19:10,295 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:19:10,297 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:19:10,297 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 23:19:10,297 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:19:10,298 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:19:10,298 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_eccaa71c-6268-416d-9815-d56275eafcf7/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 -> aeade23d65797ff650f62ff8e383f015764d9ed2 [2018-10-26 23:19:10,324 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:19:10,336 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:19:10,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:19:10,342 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:19:10,343 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:19:10,344 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i [2018-10-26 23:19:10,390 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/data/f7df13270/f673d3a8463449ea996c825b14be1e53/FLAGdddd6cd1d [2018-10-26 23:19:10,760 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:19:10,761 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i [2018-10-26 23:19:10,766 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/data/f7df13270/f673d3a8463449ea996c825b14be1e53/FLAGdddd6cd1d [2018-10-26 23:19:10,776 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/data/f7df13270/f673d3a8463449ea996c825b14be1e53 [2018-10-26 23:19:10,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:19:10,780 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:19:10,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:19:10,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:19:10,785 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:19:10,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb7a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10, skipping insertion in model container [2018-10-26 23:19:10,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:19:10,811 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:19:10,922 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:19:10,924 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:19:10,934 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:19:10,944 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:19:10,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10 WrapperNode [2018-10-26 23:19:10,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:19:10,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:19:10,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:19:10,946 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:19:10,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... [2018-10-26 23:19:10,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:19:10,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:19:10,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:19:10,973 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:19:10,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:19:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:19:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:19:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 23:19:11,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:19:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 23:19:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 23:19:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:19:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:19:11,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:19:11,274 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:19:11,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:19:11 BoogieIcfgContainer [2018-10-26 23:19:11,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:19:11,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:19:11,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:19:11,278 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:19:11,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:19:10" (1/3) ... [2018-10-26 23:19:11,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e86d5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:19:11, skipping insertion in model container [2018-10-26 23:19:11,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:10" (2/3) ... [2018-10-26 23:19:11,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e86d5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:19:11, skipping insertion in model container [2018-10-26 23:19:11,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:19:11" (3/3) ... [2018-10-26 23:19:11,283 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_false-unreach-call_true-termination.i [2018-10-26 23:19:11,289 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:19:11,294 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:19:11,304 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:19:11,327 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 23:19:11,328 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:19:11,328 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:19:11,328 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:19:11,328 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:19:11,328 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:19:11,328 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:19:11,328 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:19:11,328 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:19:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 23:19:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 23:19:11,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:19:11,350 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:19:11,353 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:19:11,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:19:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-10-26 23:19:11,360 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:19:11,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:19:11,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:11,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:19:11,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:19:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:19:11,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:19:11,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 23:19:11,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 23:19:11,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 23:19:11,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:19:11,473 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-26 23:19:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:19:11,497 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-26 23:19:11,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 23:19:11,499 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 23:19:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:19:11,507 INFO L225 Difference]: With dead ends: 31 [2018-10-26 23:19:11,509 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 23:19:11,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:19:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 23:19:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 23:19:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 23:19:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-26 23:19:11,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-10-26 23:19:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:19:11,546 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-26 23:19:11,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 23:19:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-26 23:19:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 23:19:11,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:19:11,547 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:19:11,547 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:19:11,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:19:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-10-26 23:19:11,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:19:11,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:19:11,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:11,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:19:11,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:19:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:19:11,637 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:19:11,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:19:11,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:19:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:19:11,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:19:11,639 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2018-10-26 23:19:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:19:11,714 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-10-26 23:19:11,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:19:11,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 23:19:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:19:11,715 INFO L225 Difference]: With dead ends: 27 [2018-10-26 23:19:11,715 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 23:19:11,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:19:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 23:19:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-26 23:19:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-26 23:19:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-26 23:19:11,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-10-26 23:19:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:19:11,721 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-26 23:19:11,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:19:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-26 23:19:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 23:19:11,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:19:11,722 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:19:11,722 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:19:11,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:19:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-10-26 23:19:11,723 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:19:11,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:19:11,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:11,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:19:11,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:19:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:19:11,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:19:11,785 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:19:11,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:19:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:19:11,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:19:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:19:11,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-26 23:19:11,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2018-10-26 23:19:11,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:19:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:19:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:19:11,900 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2018-10-26 23:19:12,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:19:12,009 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2018-10-26 23:19:12,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 23:19:12,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-10-26 23:19:12,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:19:12,011 INFO L225 Difference]: With dead ends: 39 [2018-10-26 23:19:12,011 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 23:19:12,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:19:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 23:19:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-10-26 23:19:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 23:19:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-26 23:19:12,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 15 [2018-10-26 23:19:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:19:12,016 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-26 23:19:12,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:19:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-26 23:19:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 23:19:12,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:19:12,017 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:19:12,017 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:19:12,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:19:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash 352425279, now seen corresponding path program 1 times [2018-10-26 23:19:12,017 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:19:12,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:19:12,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:12,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:19:12,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:19:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-26 23:19:12,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:19:12,136 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:19:12,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:19:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:19:12,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:19:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:19:12,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:19:12,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2018-10-26 23:19:12,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 23:19:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 23:19:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:19:12,393 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2018-10-26 23:19:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:19:12,453 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2018-10-26 23:19:12,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:19:12,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-10-26 23:19:12,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:19:12,456 INFO L225 Difference]: With dead ends: 47 [2018-10-26 23:19:12,457 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 23:19:12,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:19:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 23:19:12,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2018-10-26 23:19:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-26 23:19:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-10-26 23:19:12,464 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2018-10-26 23:19:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:19:12,465 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-10-26 23:19:12,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 23:19:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-10-26 23:19:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-26 23:19:12,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:19:12,466 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:19:12,466 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:19:12,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:19:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1518099348, now seen corresponding path program 2 times [2018-10-26 23:19:12,467 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:19:12,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:19:12,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:12,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:19:12,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:19:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:19:12,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:19:12,715 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/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 [2018-10-26 23:19:12,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:19:12,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:19:12,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:19:12,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:19:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:19:12,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:19:12,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-26 23:19:12,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 23:19:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 23:19:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:19:12,783 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2018-10-26 23:19:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:19:12,865 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-26 23:19:12,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 23:19:12,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-10-26 23:19:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:19:12,867 INFO L225 Difference]: With dead ends: 49 [2018-10-26 23:19:12,867 INFO L226 Difference]: Without dead ends: 44 [2018-10-26 23:19:12,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:19:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-26 23:19:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-26 23:19:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-26 23:19:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2018-10-26 23:19:12,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2018-10-26 23:19:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:19:12,876 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2018-10-26 23:19:12,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 23:19:12,876 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2018-10-26 23:19:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-26 23:19:12,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:19:12,877 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:19:12,878 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:19:12,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:19:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash 940069211, now seen corresponding path program 3 times [2018-10-26 23:19:12,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:19:12,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:19:12,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:12,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:19:12,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:19:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:19:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:19:12,924 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 23:19:12,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:19:12 BoogieIcfgContainer [2018-10-26 23:19:12,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:19:12,951 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 23:19:12,951 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 23:19:12,952 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 23:19:12,952 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:19:11" (3/4) ... [2018-10-26 23:19:12,956 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 23:19:13,005 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_eccaa71c-6268-416d-9815-d56275eafcf7/bin-2019/uautomizer/witness.graphml [2018-10-26 23:19:13,005 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 23:19:13,006 INFO L168 Benchmark]: Toolchain (without parser) took 2226.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 955.8 MB in the beginning and 1.1 GB in the end (delta: -99.0 MB). Peak memory consumption was 76.1 MB. Max. memory is 11.5 GB. [2018-10-26 23:19:13,008 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:19:13,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.02 ms. Allocated memory is still 1.0 GB. Free memory was 955.8 MB in the beginning and 945.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:19:13,009 INFO L168 Benchmark]: Boogie Preprocessor took 26.70 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:19:13,009 INFO L168 Benchmark]: RCFGBuilder took 302.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -218.1 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2018-10-26 23:19:13,010 INFO L168 Benchmark]: TraceAbstraction took 1675.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 104.7 MB). Peak memory consumption was 104.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:19:13,013 INFO L168 Benchmark]: Witness Printer took 53.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:19:13,016 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 164.02 ms. Allocated memory is still 1.0 GB. Free memory was 955.8 MB in the beginning and 945.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.70 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 302.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -218.1 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1675.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 104.7 MB). Peak memory consumption was 104.7 MB. Max. memory is 11.5 GB. * Witness Printer took 53.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 1.6s OverallTime, 6 OverallIterations, 9 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 48 SDslu, 138 SDs, 0 SdLazy, 85 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 226 NumberOfCodeBlocks, 226 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 10809 SizeOfPredicates, 2 NumberOfNonLiveVariables, 149 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 42/264 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...