./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eda42c9201fdedd9f50669e53ef2af5b1d7cb675 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-635dfa2 [2018-12-09 18:41:00,392 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 18:41:00,393 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 18:41:00,399 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 18:41:00,399 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 18:41:00,400 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 18:41:00,400 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 18:41:00,401 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 18:41:00,402 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 18:41:00,402 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 18:41:00,403 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 18:41:00,403 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 18:41:00,403 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 18:41:00,404 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 18:41:00,404 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 18:41:00,405 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 18:41:00,405 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 18:41:00,406 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 18:41:00,407 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 18:41:00,407 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 18:41:00,408 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 18:41:00,408 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 18:41:00,410 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 18:41:00,410 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 18:41:00,410 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 18:41:00,410 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 18:41:00,411 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 18:41:00,411 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 18:41:00,411 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 18:41:00,412 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 18:41:00,412 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 18:41:00,412 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 18:41:00,413 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 18:41:00,413 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 18:41:00,413 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 18:41:00,413 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 18:41:00,414 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 18:41:00,420 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 18:41:00,421 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 18:41:00,421 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 18:41:00,421 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 18:41:00,421 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 18:41:00,421 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 18:41:00,421 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 18:41:00,422 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 18:41:00,422 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 18:41:00,422 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 18:41:00,422 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 18:41:00,422 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 18:41:00,422 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 18:41:00,422 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 18:41:00,422 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 18:41:00,423 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 18:41:00,423 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 18:41:00,424 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 18:41:00,424 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan 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 -> Taipan 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 -> eda42c9201fdedd9f50669e53ef2af5b1d7cb675 [2018-12-09 18:41:00,442 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 18:41:00,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 18:41:00,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 18:41:00,455 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 18:41:00,455 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 18:41:00,456 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/../../sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i [2018-12-09 18:41:00,500 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/data/8e34888a6/bc0516f3652d40a8b9ba8dc7d45dab87/FLAG87a23fa9c [2018-12-09 18:41:00,828 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 18:41:00,829 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/sv-benchmarks/c/bitvector-loops/verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i [2018-12-09 18:41:00,832 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/data/8e34888a6/bc0516f3652d40a8b9ba8dc7d45dab87/FLAG87a23fa9c [2018-12-09 18:41:01,230 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/data/8e34888a6/bc0516f3652d40a8b9ba8dc7d45dab87 [2018-12-09 18:41:01,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 18:41:01,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 18:41:01,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 18:41:01,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 18:41:01,235 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 18:41:01,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d10e54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01, skipping insertion in model container [2018-12-09 18:41:01,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 18:41:01,255 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 18:41:01,347 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 18:41:01,349 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 18:41:01,361 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 18:41:01,372 INFO L195 MainTranslator]: Completed translation [2018-12-09 18:41:01,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01 WrapperNode [2018-12-09 18:41:01,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 18:41:01,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 18:41:01,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 18:41:01,373 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 18:41:01,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 18:41:01,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 18:41:01,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 18:41:01,392 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 18:41:01,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... [2018-12-09 18:41:01,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 18:41:01,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 18:41:01,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 18:41:01,438 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 18:41:01,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 18:41:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 18:41:01,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 18:41:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 18:41:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 18:41:01,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 18:41:01,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 18:41:01,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 18:41:01,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 18:41:01,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 18:41:01,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 18:41:01,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 18:41:01,578 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 18:41:01,578 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-12-09 18:41:01,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:41:01 BoogieIcfgContainer [2018-12-09 18:41:01,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 18:41:01,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 18:41:01,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 18:41:01,581 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 18:41:01,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:41:01" (1/3) ... [2018-12-09 18:41:01,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3588fdf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:41:01, skipping insertion in model container [2018-12-09 18:41:01,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:41:01" (2/3) ... [2018-12-09 18:41:01,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3588fdf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:41:01, skipping insertion in model container [2018-12-09 18:41:01,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:41:01" (3/3) ... [2018-12-09 18:41:01,583 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_sendmail__tTflag_arr_one_loop_false-unreach-call_true-termination.i [2018-12-09 18:41:01,589 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 18:41:01,594 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 18:41:01,604 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 18:41:01,622 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 18:41:01,622 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 18:41:01,622 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 18:41:01,622 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 18:41:01,622 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 18:41:01,622 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 18:41:01,622 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 18:41:01,622 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 18:41:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-12-09 18:41:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 18:41:01,635 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:01,636 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:01,637 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:01,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1522547275, now seen corresponding path program 1 times [2018-12-09 18:41:01,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:01,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:01,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:01,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:01,671 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:41:01,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 18:41:01,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 18:41:01,712 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:41:01,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 18:41:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 18:41:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 18:41:01,724 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-12-09 18:41:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:01,735 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-09 18:41:01,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 18:41:01,736 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-12-09 18:41:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:01,741 INFO L225 Difference]: With dead ends: 36 [2018-12-09 18:41:01,741 INFO L226 Difference]: Without dead ends: 15 [2018-12-09 18:41:01,743 INFO L631 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 [2018-12-09 18:41:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-09 18:41:01,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-09 18:41:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-09 18:41:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-09 18:41:01,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-12-09 18:41:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:01,763 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-09 18:41:01,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 18:41:01,763 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-09 18:41:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 18:41:01,764 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:01,764 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:01,764 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:01,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1742365231, now seen corresponding path program 1 times [2018-12-09 18:41:01,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:01,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:01,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:01,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:01,765 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:41:01,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 18:41:01,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 18:41:01,794 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:41:01,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 18:41:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 18:41:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 18:41:01,795 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2018-12-09 18:41:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:01,812 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2018-12-09 18:41:01,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 18:41:01,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-12-09 18:41:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:01,814 INFO L225 Difference]: With dead ends: 26 [2018-12-09 18:41:01,814 INFO L226 Difference]: Without dead ends: 19 [2018-12-09 18:41:01,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 18:41:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-09 18:41:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-12-09 18:41:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 18:41:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-12-09 18:41:01,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2018-12-09 18:41:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:01,818 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-12-09 18:41:01,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 18:41:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-12-09 18:41:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 18:41:01,818 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:01,818 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:01,818 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:01,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash 351378381, now seen corresponding path program 1 times [2018-12-09 18:41:01,819 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:01,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:01,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:01,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:01,820 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:41:01,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:01,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:01,848 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-12-09 18:41:01,849 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [26], [35], [38], [40], [46], [47], [48], [50] [2018-12-09 18:41:01,868 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:41:01,868 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:41:01,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:41:01,969 INFO L272 AbstractInterpreter]: Visited 15 different actions 24 times. Merged at 2 different actions 6 times. Never widened. Performed 138 root evaluator evaluations with a maximum evaluation depth of 3. Performed 138 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 21 variables. [2018-12-09 18:41:01,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:01,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:41:01,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:01,974 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:01,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:01,980 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:41:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:41:02,016 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:41:02,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:02,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-09 18:41:02,063 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:02,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 18:41:02,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 18:41:02,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-09 18:41:02,063 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2018-12-09 18:41:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:02,080 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-12-09 18:41:02,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 18:41:02,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-12-09 18:41:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:02,081 INFO L225 Difference]: With dead ends: 28 [2018-12-09 18:41:02,081 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 18:41:02,081 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-09 18:41:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 18:41:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-12-09 18:41:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 18:41:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-09 18:41:02,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-12-09 18:41:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:02,084 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-09 18:41:02,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 18:41:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-09 18:41:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-09 18:41:02,084 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:02,084 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:02,084 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:02,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash -652155413, now seen corresponding path program 2 times [2018-12-09 18:41:02,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:02,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:02,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,085 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:41:02,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:02,118 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:02,118 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:02,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,118 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:02,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:41:02,124 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:41:02,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 18:41:02,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:41:02,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 18:41:02,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 18:41:02,196 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:41:02,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 10 [2018-12-09 18:41:02,197 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:41:02,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 18:41:02,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 18:41:02,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-12-09 18:41:02,197 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-12-09 18:41:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:02,220 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-09 18:41:02,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 18:41:02,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-09 18:41:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:02,221 INFO L225 Difference]: With dead ends: 24 [2018-12-09 18:41:02,221 INFO L226 Difference]: Without dead ends: 19 [2018-12-09 18:41:02,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-09 18:41:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-09 18:41:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-09 18:41:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-09 18:41:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-12-09 18:41:02,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-12-09 18:41:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:02,224 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-12-09 18:41:02,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 18:41:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-12-09 18:41:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-09 18:41:02,224 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:02,224 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:02,224 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:02,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1293556435, now seen corresponding path program 1 times [2018-12-09 18:41:02,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:02,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:41:02,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,225 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:41:02,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,263 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:02,263 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-12-09 18:41:02,264 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [26], [28], [35], [38], [40], [46], [47], [48], [50] [2018-12-09 18:41:02,265 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:41:02,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:41:02,323 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:41:02,324 INFO L272 AbstractInterpreter]: Visited 16 different actions 37 times. Merged at 4 different actions 10 times. Never widened. Performed 258 root evaluator evaluations with a maximum evaluation depth of 6. Performed 258 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 3 different actions. Largest state had 23 variables. [2018-12-09 18:41:02,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:02,325 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:41:02,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,325 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:02,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:02,331 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:41:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:41:02,351 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:41:02,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:02,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-09 18:41:02,381 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:02,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 18:41:02,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 18:41:02,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:41:02,382 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-12-09 18:41:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:02,397 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-12-09 18:41:02,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 18:41:02,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-09 18:41:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:02,398 INFO L225 Difference]: With dead ends: 30 [2018-12-09 18:41:02,399 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 18:41:02,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:41:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 18:41:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-09 18:41:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-09 18:41:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-09 18:41:02,402 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-12-09 18:41:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:02,403 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-09 18:41:02,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 18:41:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-09 18:41:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-09 18:41:02,403 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:02,404 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:02,404 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:02,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2009320459, now seen corresponding path program 2 times [2018-12-09 18:41:02,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:02,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:02,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,405 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:41:02,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,447 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:02,447 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:02,448 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:02,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,448 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:02,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:41:02,454 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:41:02,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-09 18:41:02,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:41:02,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 18:41:02,513 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 18:41:02,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:02,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-12-09 18:41:02,577 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:02,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 18:41:02,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 18:41:02,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:41:02,578 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2018-12-09 18:41:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:02,675 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2018-12-09 18:41:02,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 18:41:02,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-12-09 18:41:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:02,676 INFO L225 Difference]: With dead ends: 36 [2018-12-09 18:41:02,676 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 18:41:02,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2018-12-09 18:41:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 18:41:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-12-09 18:41:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 18:41:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-09 18:41:02,680 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2018-12-09 18:41:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:02,681 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-09 18:41:02,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 18:41:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-09 18:41:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 18:41:02,682 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:02,682 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:02,682 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:02,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash -428652121, now seen corresponding path program 3 times [2018-12-09 18:41:02,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:02,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:41:02,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,683 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 18:41:02,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,740 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:02,740 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:02,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:02,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,740 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:02,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 18:41:02,749 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 18:41:02,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 18:41:02,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:41:02,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 18:41:02,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 18:41:02,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:02,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2018-12-09 18:41:02,832 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:02,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 18:41:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 18:41:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:41:02,833 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-12-09 18:41:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:02,855 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-09 18:41:02,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 18:41:02,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-12-09 18:41:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:02,856 INFO L225 Difference]: With dead ends: 36 [2018-12-09 18:41:02,857 INFO L226 Difference]: Without dead ends: 27 [2018-12-09 18:41:02,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:41:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-09 18:41:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-12-09 18:41:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 18:41:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-09 18:41:02,860 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2018-12-09 18:41:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:02,860 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-09 18:41:02,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 18:41:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-09 18:41:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 18:41:02,860 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:02,860 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:02,861 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:02,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:02,861 INFO L82 PathProgramCache]: Analyzing trace with hash 868062661, now seen corresponding path program 4 times [2018-12-09 18:41:02,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:02,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:41:02,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:02,862 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,906 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 18:41:02,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:02,906 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:02,906 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:02,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:02,906 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:02,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:02,912 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:41:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:02,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 18:41:02,933 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 18:41:02,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:02,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2018-12-09 18:41:02,998 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:02,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 18:41:02,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 18:41:02,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:41:02,999 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2018-12-09 18:41:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:03,017 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-12-09 18:41:03,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 18:41:03,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-12-09 18:41:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:03,018 INFO L225 Difference]: With dead ends: 38 [2018-12-09 18:41:03,018 INFO L226 Difference]: Without dead ends: 29 [2018-12-09 18:41:03,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:41:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-09 18:41:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-12-09 18:41:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 18:41:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-12-09 18:41:03,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2018-12-09 18:41:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:03,023 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-12-09 18:41:03,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 18:41:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-12-09 18:41:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 18:41:03,024 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:03,024 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:03,024 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:03,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1470452323, now seen corresponding path program 5 times [2018-12-09 18:41:03,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:03,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:03,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:03,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:03,025 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 18:41:03,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:03,081 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:03,081 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:03,081 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:03,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:03,081 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/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 [2018-12-09 18:41:03,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:41:03,087 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:41:03,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-09 18:41:03,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:41:03,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-09 18:41:03,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-09 18:41:03,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:03,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2018-12-09 18:41:03,436 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:03,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 18:41:03,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 18:41:03,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-12-09 18:41:03,437 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2018-12-09 18:41:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:03,744 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2018-12-09 18:41:03,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 18:41:03,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2018-12-09 18:41:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:03,744 INFO L225 Difference]: With dead ends: 46 [2018-12-09 18:41:03,745 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 18:41:03,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2018-12-09 18:41:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 18:41:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-09 18:41:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 18:41:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-09 18:41:03,750 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2018-12-09 18:41:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:03,751 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-09 18:41:03,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 18:41:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-09 18:41:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 18:41:03,751 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:03,751 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:03,752 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:03,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash 80038431, now seen corresponding path program 6 times [2018-12-09 18:41:03,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:03,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:03,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:41:03,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:03,753 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 18:41:03,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:03,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:03,803 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:03,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:03,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:03,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:41:03,811 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 18:41:03,812 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 18:41:03,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 18:41:03,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:41:03,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 18:41:03,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 18:41:03,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:03,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2018-12-09 18:41:03,905 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:03,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 18:41:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 18:41:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:41:03,906 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2018-12-09 18:41:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:03,931 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2018-12-09 18:41:03,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 18:41:03,931 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-12-09 18:41:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:03,931 INFO L225 Difference]: With dead ends: 46 [2018-12-09 18:41:03,931 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 18:41:03,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:41:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 18:41:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-12-09 18:41:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-09 18:41:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-09 18:41:03,935 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-12-09 18:41:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:03,935 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-09 18:41:03,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 18:41:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-09 18:41:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-09 18:41:03,935 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:03,935 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:03,936 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:03,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2028715969, now seen corresponding path program 7 times [2018-12-09 18:41:03,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:03,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:03,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:41:03,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:03,936 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 18:41:03,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:03,992 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:03,992 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:03,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:03,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:03,992 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:41:03,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:03,998 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:41:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:04,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 18:41:04,019 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 18:41:04,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:04,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2018-12-09 18:41:04,090 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:04,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 18:41:04,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 18:41:04,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:41:04,090 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2018-12-09 18:41:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:04,119 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-12-09 18:41:04,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 18:41:04,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-12-09 18:41:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:04,120 INFO L225 Difference]: With dead ends: 48 [2018-12-09 18:41:04,120 INFO L226 Difference]: Without dead ends: 38 [2018-12-09 18:41:04,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:41:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-09 18:41:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-12-09 18:41:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 18:41:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-12-09 18:41:04,125 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-12-09 18:41:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:04,125 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-12-09 18:41:04,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 18:41:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-12-09 18:41:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 18:41:04,126 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:04,126 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:04,126 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:04,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:04,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2102088931, now seen corresponding path program 8 times [2018-12-09 18:41:04,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:04,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:04,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:04,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:04,127 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 18:41:04,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:04,185 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:04,185 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:04,185 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:04,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:04,185 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:41:04,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:41:04,192 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:41:04,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 18:41:04,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:41:04,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:41:04,685 WARN L180 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2018-12-09 18:41:14,114 WARN L180 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2018-12-09 18:41:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-09 18:41:17,524 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:41:36,749 WARN L180 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 114 [2018-12-09 18:41:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-09 18:41:37,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:41:37,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2018-12-09 18:41:37,624 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:37,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 18:41:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 18:41:37,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=419, Unknown=8, NotChecked=0, Total=552 [2018-12-09 18:41:37,625 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 18 states. [2018-12-09 18:41:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:44,616 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2018-12-09 18:41:44,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 18:41:44,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2018-12-09 18:41:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:44,616 INFO L225 Difference]: With dead ends: 54 [2018-12-09 18:41:44,616 INFO L226 Difference]: Without dead ends: 41 [2018-12-09 18:41:44,617 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=310, Invalid=804, Unknown=8, NotChecked=0, Total=1122 [2018-12-09 18:41:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-09 18:41:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-12-09 18:41:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-09 18:41:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-12-09 18:41:44,620 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2018-12-09 18:41:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:44,620 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-12-09 18:41:44,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 18:41:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-12-09 18:41:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-09 18:41:44,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:44,621 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:44,621 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:44,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash 491342457, now seen corresponding path program 9 times [2018-12-09 18:41:44,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:44,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:44,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:41:44,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:44,622 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-09 18:41:44,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:44,763 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:44,763 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:44,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:44,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:44,764 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:41:44,769 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 18:41:44,769 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 18:41:56,835 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 18:41:56,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-09 18:41:57,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:41:57,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-12-09 18:41:57,058 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:41:57,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 18:41:57,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 18:41:57,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:41:57,058 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 9 states. [2018-12-09 18:41:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:41:57,106 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-09 18:41:57,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 18:41:57,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-12-09 18:41:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:41:57,107 INFO L225 Difference]: With dead ends: 46 [2018-12-09 18:41:57,107 INFO L226 Difference]: Without dead ends: 41 [2018-12-09 18:41:57,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-12-09 18:41:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-09 18:41:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-09 18:41:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-09 18:41:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-09 18:41:57,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2018-12-09 18:41:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:41:57,113 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-09 18:41:57,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 18:41:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-09 18:41:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 18:41:57,114 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:41:57,114 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:41:57,114 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:41:57,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:41:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1912715259, now seen corresponding path program 10 times [2018-12-09 18:41:57,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:41:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:57,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:41:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:41:57,115 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:41:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:41:59,220 WARN L180 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 25 DAG size of output: 13 [2018-12-09 18:41:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-09 18:41:59,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:59,239 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:41:59,239 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:41:59,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:41:59,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:41:59,239 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:41:59,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:41:59,245 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:42:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-12-09 18:42:11,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:42:11,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-12-09 18:42:11,318 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:42:11,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 18:42:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 18:42:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-12-09 18:42:11,318 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2018-12-09 18:42:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:42:11,382 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-12-09 18:42:11,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 18:42:11,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-09 18:42:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:42:11,383 INFO L225 Difference]: With dead ends: 47 [2018-12-09 18:42:11,383 INFO L226 Difference]: Without dead ends: 42 [2018-12-09 18:42:11,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:42:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-09 18:42:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-09 18:42:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-09 18:42:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-09 18:42:11,387 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-12-09 18:42:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:42:11,388 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-09 18:42:11,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 18:42:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-09 18:42:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 18:42:11,388 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:42:11,388 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:42:11,388 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:42:11,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:42:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 870906873, now seen corresponding path program 11 times [2018-12-09 18:42:11,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:42:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:42:11,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:42:11,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:42:11,390 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:42:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:42:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-09 18:42:11,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:42:11,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:42:11,473 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:42:11,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:42:11,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:42:11,473 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:42:11,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:42:11,480 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:44:03,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-09 18:44:03,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-09 18:44:03,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:44:03,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-12-09 18:44:03,391 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:44:03,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 18:44:03,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 18:44:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-09 18:44:03,392 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 11 states. [2018-12-09 18:44:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:44:03,435 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-09 18:44:03,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 18:44:03,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-09 18:44:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:44:03,436 INFO L225 Difference]: With dead ends: 48 [2018-12-09 18:44:03,436 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 18:44:03,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-12-09 18:44:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 18:44:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-09 18:44:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-09 18:44:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-12-09 18:44:03,440 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2018-12-09 18:44:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:44:03,440 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-12-09 18:44:03,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 18:44:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-12-09 18:44:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 18:44:03,440 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:44:03,440 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:44:03,441 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:44:03,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:44:03,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1263847045, now seen corresponding path program 12 times [2018-12-09 18:44:03,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:44:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:44:03,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:44:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:44:03,441 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:44:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:44:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-09 18:44:03,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:44:03,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:44:03,548 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:44:03,548 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:44:03,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:44:03,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:44:03,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 18:44:03,555 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 18:44:15,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 18:44:15,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-09 18:44:15,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:44:15,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-12-09 18:44:15,976 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:44:15,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 18:44:15,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 18:44:15,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-09 18:44:15,976 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-12-09 18:44:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:44:16,024 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-09 18:44:16,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 18:44:16,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-12-09 18:44:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:44:16,025 INFO L225 Difference]: With dead ends: 49 [2018-12-09 18:44:16,025 INFO L226 Difference]: Without dead ends: 44 [2018-12-09 18:44:16,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:44:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-09 18:44:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-09 18:44:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-09 18:44:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-09 18:44:16,030 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-12-09 18:44:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:44:16,030 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-09 18:44:16,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 18:44:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-09 18:44:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 18:44:16,031 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:44:16,031 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:44:16,031 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:44:16,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:44:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash 560090489, now seen corresponding path program 13 times [2018-12-09 18:44:16,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:44:16,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:44:16,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:44:16,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:44:16,032 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:44:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:44:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-09 18:44:16,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:44:16,259 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:44:16,259 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:44:16,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:44:16,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:44:16,259 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:44:16,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:44:16,266 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:44:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-12-09 18:44:28,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:44:28,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-12-09 18:44:28,327 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:44:28,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 18:44:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 18:44:28,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:44:28,327 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 13 states. [2018-12-09 18:44:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:44:28,381 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-12-09 18:44:28,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 18:44:28,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2018-12-09 18:44:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:44:28,382 INFO L225 Difference]: With dead ends: 50 [2018-12-09 18:44:28,382 INFO L226 Difference]: Without dead ends: 45 [2018-12-09 18:44:28,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-12-09 18:44:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-09 18:44:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-09 18:44:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-09 18:44:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-09 18:44:28,386 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2018-12-09 18:44:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:44:28,386 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-09 18:44:28,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 18:44:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-09 18:44:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 18:44:28,387 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:44:28,387 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:44:28,387 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:44:28,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:44:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash 218473733, now seen corresponding path program 14 times [2018-12-09 18:44:28,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:44:28,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:44:28,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:44:28,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:44:28,388 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:44:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:44:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-12-09 18:44:28,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:44:28,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:44:28,533 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:44:28,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:44:28,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:44:28,533 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:44:28,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:44:28,543 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:46:11,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-12-09 18:46:11,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-12-09 18:46:12,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:46:12,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-12-09 18:46:12,507 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:46:12,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 18:46:12,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 18:46:12,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:46:12,507 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2018-12-09 18:46:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:46:12,554 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-12-09 18:46:12,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 18:46:12,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2018-12-09 18:46:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:46:12,555 INFO L225 Difference]: With dead ends: 51 [2018-12-09 18:46:12,555 INFO L226 Difference]: Without dead ends: 46 [2018-12-09 18:46:12,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-12-09 18:46:12,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-09 18:46:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-12-09 18:46:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-09 18:46:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-12-09 18:46:12,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-12-09 18:46:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:46:12,559 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-12-09 18:46:12,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 18:46:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-12-09 18:46:12,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 18:46:12,559 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:46:12,559 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:46:12,560 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 18:46:12,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:46:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1781711111, now seen corresponding path program 15 times [2018-12-09 18:46:12,560 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:46:12,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:46:12,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:46:12,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:46:12,560 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:46:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 18:46:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 18:46:13,528 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 18:46:13,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:46:13 BoogieIcfgContainer [2018-12-09 18:46:13,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 18:46:13,549 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 18:46:13,549 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 18:46:13,549 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 18:46:13,550 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:41:01" (3/4) ... [2018-12-09 18:46:13,551 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 18:46:13,587 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b9205ec4-73b6-4d8e-9714-108223048b5b/bin-2019/utaipan/witness.graphml [2018-12-09 18:46:13,587 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 18:46:13,588 INFO L168 Benchmark]: Toolchain (without parser) took 312355.46 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 954.9 MB in the beginning and 1.0 GB in the end (delta: -57.5 MB). Peak memory consumption was 51.5 MB. Max. memory is 11.5 GB. [2018-12-09 18:46:13,588 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 18:46:13,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.25 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 18:46:13,588 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.59 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 18:46:13,588 INFO L168 Benchmark]: Boogie Preprocessor took 46.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.9 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -138.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 18:46:13,589 INFO L168 Benchmark]: RCFGBuilder took 141.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-09 18:46:13,589 INFO L168 Benchmark]: TraceAbstraction took 311969.85 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.2 MB). Peak memory consumption was 294.4 MB. Max. memory is 11.5 GB. [2018-12-09 18:46:13,589 INFO L168 Benchmark]: Witness Printer took 37.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 11.5 GB. [2018-12-09 18:46:13,590 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.25 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.59 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 46.11 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.9 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -138.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 141.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 311969.85 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.2 MB). Peak memory consumption was 294.4 MB. Max. memory is 11.5 GB. * Witness Printer took 37.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] char in[11]; [L15] char *s; [L16] unsigned char c; [L17] int i, j; [L18] int idx_in; [L19] i = 0 VAL [i=0, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=1, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=2, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=3, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=4, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=5, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=6, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=7, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=8, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=9, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=10, in={4294967286:0}] [L19] COND TRUE i < 11 [L20] in[i] = __VERIFIER_nondet_char() [L19] i++ VAL [i=11, in={4294967286:0}] [L19] COND FALSE !(i < 11) VAL [i=11, in={4294967286:0}] [L21] in[10] = 0 [L22] idx_in = 0 [L23] s = in [L24] i = 0 [L25] EXPR in[idx_in] [L25] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND TRUE ('0' <= c) && (c <= '9') [L28] j = c - '0' [L29] i = i * 10U + j [L30] idx_in++ [L31] EXPR in[idx_in] [L31] c = in[idx_in] [L26] COND FALSE !(('0' <= c) && (c <= '9')) VAL [c=0, i=-12, idx_in=10, in={4294967286:0}, j=0, s={4294967286:0}] [L34] CALL __VERIFIER_assert (i >= 0) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. UNSAFE Result, 311.9s OverallTime, 19 OverallIterations, 11 TraceHistogramMax, 7.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 225 SDtfs, 139 SDslu, 943 SDs, 0 SdLazy, 560 SolverSat, 129 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 673 GetRequests, 449 SyntacticMatches, 17 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 36.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 18 MinimizatonAttempts, 14 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 263.6s SatisfiabilityAnalysisTime, 37.2s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1029 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 978 ConstructedInterpolants, 15 QuantifiedInterpolants, 101639 SizeOfPredicates, 26 NumberOfNonLiveVariables, 948 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 38 InterpolantComputations, 4 PerfectInterpolantSequences, 1091/1988 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...