./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/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 17744505b3a424a40a1b2449004fea58677c1b94 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:31:47,461 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:31:47,463 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:31:47,472 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:31:47,473 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:31:47,473 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:31:47,474 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:31:47,475 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:31:47,476 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:31:47,477 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:31:47,478 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:31:47,478 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:31:47,479 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:31:47,479 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:31:47,480 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:31:47,481 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:31:47,482 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:31:47,483 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:31:47,484 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:31:47,485 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:31:47,486 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:31:47,487 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:31:47,488 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:31:47,489 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:31:47,489 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:31:47,490 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:31:47,491 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:31:47,491 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:31:47,492 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:31:47,493 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:31:47,493 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:31:47,494 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:31:47,494 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:31:47,494 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:31:47,495 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:31:47,495 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:31:47,495 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 11:31:47,506 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:31:47,506 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:31:47,507 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:31:47,507 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 11:31:47,507 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 11:31:47,508 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 11:31:47,508 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 11:31:47,508 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:31:47,508 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:31:47,508 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:31:47,508 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:31:47,509 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:31:47,509 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:31:47,509 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:31:47,510 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:31:47,510 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:31:47,511 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:31:47,511 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:31:47,511 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:31:47,511 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:31:47,511 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:31:47,511 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:31:47,512 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:31:47,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:31:47,512 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:31:47,512 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:31:47,512 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:31:47,512 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 11:31:47,512 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:31:47,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:31:47,513 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_8e5d4a8f-d9da-4fde-893f-11f1c797d582/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 -> 17744505b3a424a40a1b2449004fea58677c1b94 [2018-11-18 11:31:47,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:31:47,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:31:47,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:31:47,550 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:31:47,551 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:31:47,551 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.i [2018-11-18 11:31:47,596 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/data/3f7cd588d/1f01306abe884ec5bef3b5f82ac9a13d/FLAG73aaee7ad [2018-11-18 11:31:47,928 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:31:47,928 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/sv-benchmarks/c/loop-lit/ddlm2013_true-unreach-call.i [2018-11-18 11:31:47,932 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/data/3f7cd588d/1f01306abe884ec5bef3b5f82ac9a13d/FLAG73aaee7ad [2018-11-18 11:31:47,941 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/data/3f7cd588d/1f01306abe884ec5bef3b5f82ac9a13d [2018-11-18 11:31:47,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:31:47,945 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 11:31:47,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:31:47,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:31:47,949 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:31:47,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:31:47" (1/1) ... [2018-11-18 11:31:47,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649eab1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:47, skipping insertion in model container [2018-11-18 11:31:47,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:31:47" (1/1) ... [2018-11-18 11:31:47,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:31:47,972 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:31:48,079 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:31:48,082 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:31:48,092 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:31:48,101 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:31:48,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48 WrapperNode [2018-11-18 11:31:48,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:31:48,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:31:48,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:31:48,102 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:31:48,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... [2018-11-18 11:31:48,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... [2018-11-18 11:31:48,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... [2018-11-18 11:31:48,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... [2018-11-18 11:31:48,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... [2018-11-18 11:31:48,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... [2018-11-18 11:31:48,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... [2018-11-18 11:31:48,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:31:48,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:31:48,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:31:48,120 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:31:48,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:31:48,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:31:48,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:31:48,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 11:31:48,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:31:48,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 11:31:48,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-18 11:31:48,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 11:31:48,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 11:31:48,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:31:48,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:31:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:31:48,305 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:31:48,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:31:48 BoogieIcfgContainer [2018-11-18 11:31:48,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:31:48,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:31:48,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:31:48,308 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:31:48,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:31:47" (1/3) ... [2018-11-18 11:31:48,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c0b358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:31:48, skipping insertion in model container [2018-11-18 11:31:48,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:48" (2/3) ... [2018-11-18 11:31:48,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c0b358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:31:48, skipping insertion in model container [2018-11-18 11:31:48,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:31:48" (3/3) ... [2018-11-18 11:31:48,311 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2018-11-18 11:31:48,317 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:31:48,322 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:31:48,330 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:31:48,348 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 11:31:48,348 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:31:48,348 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:31:48,348 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:31:48,348 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:31:48,349 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:31:48,349 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:31:48,349 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:31:48,349 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:31:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-18 11:31:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 11:31:48,367 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:48,368 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:48,369 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:48,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2066841578, now seen corresponding path program 1 times [2018-11-18 11:31:48,374 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:31:48,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:31:48,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:48,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:48,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:48,441 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:31:48,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 11:31:48,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 11:31:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 11:31:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:31:48,453 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2018-11-18 11:31:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:48,465 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-18 11:31:48,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 11:31:48,466 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-11-18 11:31:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:48,473 INFO L225 Difference]: With dead ends: 36 [2018-11-18 11:31:48,473 INFO L226 Difference]: Without dead ends: 16 [2018-11-18 11:31:48,475 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:31:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-18 11:31:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-18 11:31:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-18 11:31:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-11-18 11:31:48,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-11-18 11:31:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:48,501 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-11-18 11:31:48,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 11:31:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-11-18 11:31:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 11:31:48,502 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:48,502 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:48,502 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:48,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1651906282, now seen corresponding path program 1 times [2018-11-18 11:31:48,503 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:31:48,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:31:48,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:48,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:48,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:48,686 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2018-11-18 11:31:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:48,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:31:48,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:31:48,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:31:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:31:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:31:48,695 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-11-18 11:31:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:48,714 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-18 11:31:48,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:31:48,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 11:31:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:48,715 INFO L225 Difference]: With dead ends: 25 [2018-11-18 11:31:48,715 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 11:31:48,716 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:31:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 11:31:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-11-18 11:31:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-18 11:31:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-11-18 11:31:48,719 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2018-11-18 11:31:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:48,720 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-11-18 11:31:48,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:31:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2018-11-18 11:31:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 11:31:48,720 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:48,720 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:48,721 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:48,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1973708347, now seen corresponding path program 1 times [2018-11-18 11:31:48,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:31:48,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:31:48,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:48,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:48,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:48,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:31:48,910 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:31:48,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:48,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:31:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:49,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:31:49,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 11:31:49,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 11:31:49,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 11:31:49,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-18 11:31:49,066 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2018-11-18 11:31:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:49,097 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-18 11:31:49,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 11:31:49,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-11-18 11:31:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:49,098 INFO L225 Difference]: With dead ends: 32 [2018-11-18 11:31:49,098 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 11:31:49,098 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-11-18 11:31:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 11:31:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-11-18 11:31:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 11:31:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2018-11-18 11:31:49,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2018-11-18 11:31:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:49,101 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2018-11-18 11:31:49,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 11:31:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2018-11-18 11:31:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 11:31:49,102 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:49,102 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:49,102 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:49,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1386902333, now seen corresponding path program 1 times [2018-11-18 11:31:49,102 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:31:49,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:31:49,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:49,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:49,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 11:31:49,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:31:49,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 11:31:49,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 11:31:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 11:31:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 11:31:49,122 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2018-11-18 11:31:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:49,128 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 11:31:49,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 11:31:49,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-18 11:31:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:49,129 INFO L225 Difference]: With dead ends: 36 [2018-11-18 11:31:49,129 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 11:31:49,129 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 11:31:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 11:31:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-18 11:31:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 11:31:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-18 11:31:49,131 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2018-11-18 11:31:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:49,132 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-18 11:31:49,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 11:31:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-18 11:31:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 11:31:49,132 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:49,132 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:49,133 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:49,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1807628064, now seen corresponding path program 2 times [2018-11-18 11:31:49,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:31:49,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:31:49,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:49,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:49,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:49,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:31:49,310 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:31:49,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 11:31:49,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 11:31:49,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:31:49,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:31:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:49,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:31:49,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-11-18 11:31:49,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 11:31:49,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 11:31:49,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-11-18 11:31:49,451 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2018-11-18 11:31:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:49,571 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2018-11-18 11:31:49,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 11:31:49,572 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2018-11-18 11:31:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:49,572 INFO L225 Difference]: With dead ends: 60 [2018-11-18 11:31:49,572 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 11:31:49,573 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-11-18 11:31:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 11:31:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-11-18 11:31:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 11:31:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-18 11:31:49,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2018-11-18 11:31:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:49,576 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-18 11:31:49,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 11:31:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-18 11:31:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 11:31:49,576 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:49,576 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:49,577 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:49,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1736007175, now seen corresponding path program 1 times [2018-11-18 11:31:49,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:31:49,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:31:49,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:49,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:31:49,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:51,711 WARN L180 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2018-11-18 11:31:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 11:31:51,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:31:51,723 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:31:51,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:51,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:31:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 11:31:51,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:31:51,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-18 11:31:51,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:31:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:31:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:31:51,776 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 6 states. [2018-11-18 11:31:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:51,795 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-11-18 11:31:51,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:31:51,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-11-18 11:31:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:51,796 INFO L225 Difference]: With dead ends: 34 [2018-11-18 11:31:51,796 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 11:31:51,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:31:51,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 11:31:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 11:31:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 11:31:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 11:31:51,798 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2018-11-18 11:31:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:51,798 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:31:51,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:31:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 11:31:51,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 11:31:51,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 11:31:51,835 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 11:31:51,836 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:31:51,836 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:31:51,836 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 11:31:51,836 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 11:31:51,836 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 11:31:51,836 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2018-11-18 11:31:51,837 INFO L425 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2018-11-18 11:31:51,837 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:31:51,837 INFO L425 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:31:51,837 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2018-11-18 11:31:51,837 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 30) no Hoare annotation was computed. [2018-11-18 11:31:51,837 INFO L425 ceAbstractionStarter]: For program point L21-3(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:31:51,837 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 35) no Hoare annotation was computed. [2018-11-18 11:31:51,838 INFO L421 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (and (<= main_~a~0 main_~b~0) (<= main_~b~0 main_~a~0)) [2018-11-18 11:31:51,838 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 35) the Hoare annotation is: true [2018-11-18 11:31:51,838 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2018-11-18 11:31:51,838 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 11:31:51,838 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:31:51,838 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 11:31:51,838 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 11:31:51,838 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 11:31:51,838 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:31:51,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:31:51 BoogieIcfgContainer [2018-11-18 11:31:51,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:31:51,841 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:31:51,841 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:31:51,841 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:31:51,841 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:31:48" (3/4) ... [2018-11-18 11:31:51,843 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 11:31:51,848 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 11:31:51,848 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 11:31:51,848 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 11:31:51,851 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-18 11:31:51,851 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-18 11:31:51,851 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:31:51,851 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:31:51,880 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8e5d4a8f-d9da-4fde-893f-11f1c797d582/bin-2019/uautomizer/witness.graphml [2018-11-18 11:31:51,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:31:51,881 INFO L168 Benchmark]: Toolchain (without parser) took 3936.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 960.2 MB in the beginning and 937.3 MB in the end (delta: 22.9 MB). Peak memory consumption was 179.1 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:51,882 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:31:51,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.56 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:51,882 INFO L168 Benchmark]: Boogie Preprocessor took 17.87 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:51,883 INFO L168 Benchmark]: RCFGBuilder took 186.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -196.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:51,883 INFO L168 Benchmark]: TraceAbstraction took 3534.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 940.6 MB in the end (delta: 202.5 MB). Peak memory consumption was 202.5 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:51,883 INFO L168 Benchmark]: Witness Printer took 39.86 ms. Allocated memory is still 1.2 GB. Free memory was 940.6 MB in the beginning and 937.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:51,885 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 155.56 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.87 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 186.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -196.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3534.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 940.6 MB in the end (delta: 202.5 MB). Peak memory consumption was 202.5 MB. Max. memory is 11.5 GB. * Witness Printer took 39.86 ms. Allocated memory is still 1.2 GB. Free memory was 940.6 MB in the beginning and 937.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 3.4s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 112 SDtfs, 36 SDslu, 296 SDs, 0 SdLazy, 138 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 15 PreInvPairs, 20 NumberOfFragments, 12 HoareAnnotationTreeSize, 15 FomulaSimplifications, 46 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 16771 SizeOfPredicates, 7 NumberOfNonLiveVariables, 197 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 37/71 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...