./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.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_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.23-5842f4b [2018-11-18 13:17:09,346 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:17:09,346 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:17:09,352 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:17:09,353 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:17:09,353 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:17:09,354 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:17:09,355 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:17:09,356 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:17:09,357 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:17:09,358 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:17:09,358 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:17:09,358 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:17:09,359 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:17:09,359 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:17:09,360 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:17:09,360 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:17:09,362 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:17:09,363 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:17:09,364 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:17:09,364 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:17:09,365 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:17:09,367 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:17:09,367 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:17:09,367 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:17:09,368 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:17:09,368 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:17:09,369 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:17:09,369 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:17:09,370 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:17:09,370 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:17:09,370 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:17:09,371 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:17:09,371 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:17:09,371 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:17:09,372 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:17:09,372 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 13:17:09,379 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:17:09,379 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:17:09,379 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:17:09,379 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 13:17:09,380 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:17:09,380 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:17:09,380 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 13:17:09,380 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:17:09,380 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:17:09,380 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:17:09,380 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:17:09,381 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:17:09,382 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:17:09,382 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:17:09,382 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:17:09,382 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:17:09,382 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:17:09,382 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:17:09,382 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:17:09,382 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:17:09,382 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 13:17:09,383 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:17:09,383 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:17:09,383 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_6c6be389-5a70-4970-ac7a-13ca815ec16e/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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2018-11-18 13:17:09,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:17:09,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:17:09,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:17:09,416 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:17:09,416 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:17:09,417 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/../../sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-11-18 13:17:09,457 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/data/e2bd6ee09/3090873f91c74d939f3ea47724b12564/FLAGe550a8ac5 [2018-11-18 13:17:09,882 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:17:09,882 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/sv-benchmarks/c/loops/sum01_false-unreach-call_true-termination.i [2018-11-18 13:17:09,886 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/data/e2bd6ee09/3090873f91c74d939f3ea47724b12564/FLAGe550a8ac5 [2018-11-18 13:17:09,897 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/data/e2bd6ee09/3090873f91c74d939f3ea47724b12564 [2018-11-18 13:17:09,899 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:17:09,900 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 13:17:09,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:17:09,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:17:09,904 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:17:09,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:17:09" (1/1) ... [2018-11-18 13:17:09,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7623b467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:09, skipping insertion in model container [2018-11-18 13:17:09,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:17:09" (1/1) ... [2018-11-18 13:17:09,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:17:09,932 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:17:10,039 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:17:10,041 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:17:10,050 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:17:10,059 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:17:10,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10 WrapperNode [2018-11-18 13:17:10,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:17:10,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:17:10,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:17:10,060 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:17:10,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... [2018-11-18 13:17:10,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... [2018-11-18 13:17:10,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... [2018-11-18 13:17:10,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... [2018-11-18 13:17:10,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... [2018-11-18 13:17:10,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... [2018-11-18 13:17:10,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... [2018-11-18 13:17:10,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:17:10,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:17:10,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:17:10,078 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:17:10,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/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 13:17:10,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:17:10,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:17:10,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 13:17:10,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:17:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 13:17:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 13:17:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-18 13:17:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:17:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:17:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:17:10,233 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:17:10,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:17:10 BoogieIcfgContainer [2018-11-18 13:17:10,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:17:10,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:17:10,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:17:10,235 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:17:10,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:17:09" (1/3) ... [2018-11-18 13:17:10,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b516077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:17:10, skipping insertion in model container [2018-11-18 13:17:10,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:17:10" (2/3) ... [2018-11-18 13:17:10,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b516077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:17:10, skipping insertion in model container [2018-11-18 13:17:10,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:17:10" (3/3) ... [2018-11-18 13:17:10,238 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-11-18 13:17:10,246 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:17:10,252 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:17:10,262 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:17:10,286 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:17:10,287 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:17:10,287 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:17:10,287 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:17:10,287 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:17:10,287 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:17:10,287 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:17:10,287 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:17:10,287 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:17:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 13:17:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 13:17:10,306 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:10,307 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:10,309 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:10,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-11-18 13:17:10,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:10,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:10,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:10,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:10,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:10,388 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 13:17:10,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:17:10,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:17:10,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:17:10,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:17:10,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:17:10,402 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-18 13:17:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:10,416 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-18 13:17:10,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:17:10,417 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 13:17:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:10,422 INFO L225 Difference]: With dead ends: 31 [2018-11-18 13:17:10,422 INFO L226 Difference]: Without dead ends: 14 [2018-11-18 13:17:10,425 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 13:17:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-18 13:17:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-18 13:17:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-18 13:17:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-18 13:17:10,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-18 13:17:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:10,447 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-18 13:17:10,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:17:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-18 13:17:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 13:17:10,447 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:10,448 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:10,448 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:10,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:10,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-11-18 13:17:10,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:10,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:10,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:10,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:10,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:10,500 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 13:17:10,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:17:10,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:17:10,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:17:10,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:17:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:17:10,502 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-11-18 13:17:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:10,527 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-18 13:17:10,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:17:10,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-18 13:17:10,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:10,528 INFO L225 Difference]: With dead ends: 23 [2018-11-18 13:17:10,528 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 13:17:10,529 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:17:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 13:17:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 13:17:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 13:17:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-11-18 13:17:10,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2018-11-18 13:17:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:10,532 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-11-18 13:17:10,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:17:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-11-18 13:17:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 13:17:10,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:10,533 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:10,533 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:10,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:10,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-11-18 13:17:10,533 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:10,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:10,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:10,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:10,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:10,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:10,720 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/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 13:17:10,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:10,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:10,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:10,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-11-18 13:17:10,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 13:17:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 13:17:10,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:17:10,914 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 14 states. [2018-11-18 13:17:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:11,038 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-11-18 13:17:11,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 13:17:11,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2018-11-18 13:17:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:11,039 INFO L225 Difference]: With dead ends: 43 [2018-11-18 13:17:11,039 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 13:17:11,040 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-11-18 13:17:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 13:17:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-11-18 13:17:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 13:17:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 13:17:11,044 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2018-11-18 13:17:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:11,044 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 13:17:11,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 13:17:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 13:17:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 13:17:11,045 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:11,045 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:11,045 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:11,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1873071752, now seen corresponding path program 2 times [2018-11-18 13:17:11,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:11,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-18 13:17:11,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:11,186 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/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 13:17:11,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:17:11,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:17:11,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:11,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:11,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:11,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2018-11-18 13:17:11,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 13:17:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 13:17:11,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2018-11-18 13:17:11,378 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 19 states. [2018-11-18 13:17:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:11,684 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2018-11-18 13:17:11,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 13:17:11,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2018-11-18 13:17:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:11,686 INFO L225 Difference]: With dead ends: 47 [2018-11-18 13:17:11,686 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 13:17:11,687 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 13:17:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 13:17:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-18 13:17:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 13:17:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-11-18 13:17:11,693 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2018-11-18 13:17:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:11,693 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-11-18 13:17:11,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 13:17:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-11-18 13:17:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 13:17:11,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:11,694 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:11,694 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:11,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1162834632, now seen corresponding path program 1 times [2018-11-18 13:17:11,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:11,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:11,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:11,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:11,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:11,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/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 13:17:11,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:11,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:11,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:11,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 13:17:11,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:17:11,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:17:11,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:17:11,769 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 7 states. [2018-11-18 13:17:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:11,795 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-11-18 13:17:11,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:17:11,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-11-18 13:17:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:11,796 INFO L225 Difference]: With dead ends: 47 [2018-11-18 13:17:11,796 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 13:17:11,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:17:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 13:17:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-18 13:17:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 13:17:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-11-18 13:17:11,799 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2018-11-18 13:17:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:11,800 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-11-18 13:17:11,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:17:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-11-18 13:17:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 13:17:11,800 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:11,801 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:11,801 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:11,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1192139823, now seen corresponding path program 2 times [2018-11-18 13:17:11,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:11,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:17:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:11,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:11,848 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:11,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:17:11,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:17:11,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:11,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:11,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:11,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 13:17:11,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:17:11,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:17:11,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:17:11,913 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2018-11-18 13:17:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:11,954 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-11-18 13:17:11,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 13:17:11,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2018-11-18 13:17:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:11,955 INFO L225 Difference]: With dead ends: 51 [2018-11-18 13:17:11,955 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 13:17:11,955 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:17:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 13:17:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-11-18 13:17:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-18 13:17:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-11-18 13:17:11,959 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2018-11-18 13:17:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:11,960 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-11-18 13:17:11,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:17:11,960 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-11-18 13:17:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-18 13:17:11,962 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:11,962 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:11,962 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:11,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:11,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1196316582, now seen corresponding path program 3 times [2018-11-18 13:17:11,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:11,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:11,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:11,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:12,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:12,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:12,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:17:12,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-18 13:17:12,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:12,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:12,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:12,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 13:17:12,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 13:17:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 13:17:12,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:17:12,078 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2018-11-18 13:17:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:12,102 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-18 13:17:12,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 13:17:12,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-11-18 13:17:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:12,103 INFO L225 Difference]: With dead ends: 55 [2018-11-18 13:17:12,103 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 13:17:12,103 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:17:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 13:17:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-11-18 13:17:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 13:17:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-11-18 13:17:12,106 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2018-11-18 13:17:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:12,107 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-11-18 13:17:12,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 13:17:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-11-18 13:17:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 13:17:12,107 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:12,107 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:12,108 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:12,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1640333213, now seen corresponding path program 4 times [2018-11-18 13:17:12,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:12,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:12,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:12,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:12,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:12,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:12,174 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:12,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:17:12,189 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:17:12,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:12,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:12,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:12,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 13:17:12,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 13:17:12,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 13:17:12,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:17:12,212 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 10 states. [2018-11-18 13:17:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:12,240 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-11-18 13:17:12,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 13:17:12,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-18 13:17:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:12,241 INFO L225 Difference]: With dead ends: 59 [2018-11-18 13:17:12,241 INFO L226 Difference]: Without dead ends: 50 [2018-11-18 13:17:12,242 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:17:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-18 13:17:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-11-18 13:17:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 13:17:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-11-18 13:17:12,246 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2018-11-18 13:17:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:12,246 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-11-18 13:17:12,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 13:17:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-11-18 13:17:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-18 13:17:12,247 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:12,247 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:12,247 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:12,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1679174636, now seen corresponding path program 5 times [2018-11-18 13:17:12,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:12,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:12,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:12,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:12,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:17:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:12,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:17:12,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:17:12,303 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 13:17:12,314 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-11-18 13:17:12,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:17:12,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:17:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:17:12,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:17:12,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-18 13:17:12,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 13:17:12,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 13:17:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:17:12,336 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 11 states. [2018-11-18 13:17:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:17:12,358 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-11-18 13:17:12,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 13:17:12,358 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-11-18 13:17:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:17:12,359 INFO L225 Difference]: With dead ends: 63 [2018-11-18 13:17:12,359 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 13:17:12,359 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:17:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 13:17:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-11-18 13:17:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-18 13:17:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-11-18 13:17:12,362 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2018-11-18 13:17:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:17:12,363 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-11-18 13:17:12,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 13:17:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-11-18 13:17:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-18 13:17:12,363 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:17:12,363 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:17:12,364 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:17:12,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:17:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash 900655861, now seen corresponding path program 6 times [2018-11-18 13:17:12,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:17:12,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:17:12,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:12,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:17:12,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:17:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:17:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 13:17:12,390 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 13:17:12,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:17:12 BoogieIcfgContainer [2018-11-18 13:17:12,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:17:12,410 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:17:12,410 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:17:12,410 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:17:12,410 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:17:10" (3/4) ... [2018-11-18 13:17:12,412 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 13:17:12,450 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6c6be389-5a70-4970-ac7a-13ca815ec16e/bin-2019/uautomizer/witness.graphml [2018-11-18 13:17:12,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:17:12,451 INFO L168 Benchmark]: Toolchain (without parser) took 2550.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -53.2 MB). Peak memory consumption was 84.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:12,452 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:17:12,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.80 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:12,452 INFO L168 Benchmark]: Boogie Preprocessor took 17.66 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:12,453 INFO L168 Benchmark]: RCFGBuilder took 155.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:12,453 INFO L168 Benchmark]: TraceAbstraction took 2176.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 108.1 MB). Peak memory consumption was 108.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:12,453 INFO L168 Benchmark]: Witness Printer took 40.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:17:12,455 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 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 158.80 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.66 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 155.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2176.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 108.1 MB). Peak memory consumption was 108.1 MB. Max. memory is 11.5 GB. * Witness Printer took 40.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. 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, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=10, n=0] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=2, n=10] [L13] i++ VAL [i=2, n=2, n=10] [L13] COND TRUE i<=n VAL [i=2, n=2, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=4, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=10, n=6] [L13] i++ VAL [i=4, n=10, n=6] [L13] COND TRUE i<=n VAL [i=4, n=10, n=6] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=8, n=10] [L13] COND TRUE i<=n VAL [i=5, n=10, n=8] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=12, n=10] [L13] i++ VAL [i=7, n=12, n=10] [L13] COND TRUE i<=n VAL [i=7, n=12, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=10, n=14] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=10, n=14] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=16, n=10] [L13] i++ VAL [i=9, n=16, n=10] [L13] COND TRUE i<=n VAL [i=9, n=16, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=18, n=10] [L13] i++ VAL [i=10, n=18, n=10] [L13] COND TRUE i<=n VAL [i=10, n=10, n=18] [L14] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L13] i++ VAL [i=11, n=10, n=18] [L13] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L17] CALL __VERIFIER_assert(sn==n*(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, 2.1s OverallTime, 10 OverallIterations, 11 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 117 SDtfs, 59 SDslu, 515 SDs, 0 SdLazy, 480 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 319 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=9, 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, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 538 NumberOfCodeBlocks, 538 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 471 ConstructedInterpolants, 0 QuantifiedInterpolants, 47277 SizeOfPredicates, 11 NumberOfNonLiveVariables, 452 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 208/1060 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...