./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c --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_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a033d09eab07f8bc6e49bb4301ebd6c89110f535 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2018-12-08 13:42:22,660 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 13:42:22,661 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 13:42:22,667 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 13:42:22,667 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 13:42:22,668 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 13:42:22,669 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 13:42:22,670 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 13:42:22,670 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 13:42:22,671 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 13:42:22,671 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 13:42:22,671 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 13:42:22,672 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 13:42:22,672 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 13:42:22,673 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 13:42:22,673 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 13:42:22,674 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 13:42:22,675 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 13:42:22,676 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 13:42:22,676 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 13:42:22,677 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 13:42:22,677 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 13:42:22,679 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 13:42:22,679 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 13:42:22,679 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 13:42:22,679 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 13:42:22,680 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 13:42:22,680 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 13:42:22,681 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 13:42:22,681 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 13:42:22,682 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 13:42:22,682 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 13:42:22,682 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 13:42:22,682 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 13:42:22,683 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 13:42:22,683 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 13:42:22,683 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 13:42:22,690 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 13:42:22,690 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 13:42:22,691 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 13:42:22,691 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 13:42:22,691 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 13:42:22,691 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 13:42:22,692 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 13:42:22,692 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 13:42:22,692 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 13:42:22,692 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 13:42:22,692 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 13:42:22,692 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 13:42:22,692 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 13:42:22,692 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 13:42:22,693 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 13:42:22,693 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 13:42:22,693 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 13:42:22,693 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 13:42:22,693 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 13:42:22,693 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 13:42:22,693 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 13:42:22,693 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 13:42:22,694 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 13:42:22,694 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 13:42:22,694 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 13:42:22,694 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 13:42:22,694 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 13:42:22,694 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 13:42:22,694 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 13:42:22,694 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 13:42:22,695 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a033d09eab07f8bc6e49bb4301ebd6c89110f535 [2018-12-08 13:42:22,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 13:42:22,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 13:42:22,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 13:42:22,721 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 13:42:22,722 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 13:42:22,722 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-08 13:42:22,767 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/data/cc0437eeb/81f76e7e7a90446382e99abbfa1a969e/FLAG60fe723cd [2018-12-08 13:42:23,193 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 13:42:23,194 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/sv-benchmarks/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-08 13:42:23,197 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/data/cc0437eeb/81f76e7e7a90446382e99abbfa1a969e/FLAG60fe723cd [2018-12-08 13:42:23,206 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/data/cc0437eeb/81f76e7e7a90446382e99abbfa1a969e [2018-12-08 13:42:23,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 13:42:23,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 13:42:23,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 13:42:23,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 13:42:23,211 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 13:42:23,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7084b22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23, skipping insertion in model container [2018-12-08 13:42:23,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 13:42:23,226 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 13:42:23,310 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 13:42:23,312 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 13:42:23,321 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 13:42:23,328 INFO L195 MainTranslator]: Completed translation [2018-12-08 13:42:23,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23 WrapperNode [2018-12-08 13:42:23,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 13:42:23,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 13:42:23,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 13:42:23,329 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 13:42:23,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 13:42:23,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 13:42:23,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 13:42:23,340 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 13:42:23,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... [2018-12-08 13:42:23,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 13:42:23,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 13:42:23,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 13:42:23,350 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 13:42:23,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 13:42:23,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 13:42:23,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 13:42:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-12-08 13:42:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-12-08 13:42:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 13:42:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 13:42:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 13:42:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 13:42:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-08 13:42:23,411 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-08 13:42:23,493 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 13:42:23,493 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 13:42:23,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:42:23 BoogieIcfgContainer [2018-12-08 13:42:23,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 13:42:23,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 13:42:23,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 13:42:23,496 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 13:42:23,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 01:42:23" (1/3) ... [2018-12-08 13:42:23,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228735e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 01:42:23, skipping insertion in model container [2018-12-08 13:42:23,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 01:42:23" (2/3) ... [2018-12-08 13:42:23,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228735e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 01:42:23, skipping insertion in model container [2018-12-08 13:42:23,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:42:23" (3/3) ... [2018-12-08 13:42:23,498 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-08 13:42:23,503 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 13:42:23,507 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 13:42:23,516 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 13:42:23,533 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 13:42:23,533 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 13:42:23,533 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 13:42:23,533 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 13:42:23,533 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 13:42:23,533 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 13:42:23,533 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 13:42:23,533 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 13:42:23,533 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 13:42:23,543 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-12-08 13:42:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 13:42:23,547 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:42:23,547 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:42:23,548 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:42:23,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:42:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2018-12-08 13:42:23,553 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:42:23,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:42:23,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:42:23,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:42:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:42:23,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:42:23,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 13:42:23,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 13:42:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 13:42:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:23,692 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-12-08 13:42:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:42:23,716 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-12-08 13:42:23,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 13:42:23,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 13:42:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:42:23,723 INFO L225 Difference]: With dead ends: 40 [2018-12-08 13:42:23,723 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 13:42:23,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 13:42:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-08 13:42:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 13:42:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-08 13:42:23,749 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2018-12-08 13:42:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:42:23,749 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-08 13:42:23,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 13:42:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-08 13:42:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 13:42:23,750 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:42:23,750 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:42:23,751 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:42:23,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:42:23,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2018-12-08 13:42:23,751 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:42:23,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:42:23,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:42:23,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:42:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:42:23,806 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:42:23,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 13:42:23,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 13:42:23,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 13:42:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:23,808 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-12-08 13:42:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:42:23,820 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-12-08 13:42:23,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 13:42:23,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-08 13:42:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:42:23,821 INFO L225 Difference]: With dead ends: 44 [2018-12-08 13:42:23,821 INFO L226 Difference]: Without dead ends: 32 [2018-12-08 13:42:23,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:23,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-08 13:42:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-08 13:42:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 13:42:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-08 13:42:23,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-12-08 13:42:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:42:23,826 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-08 13:42:23,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 13:42:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-08 13:42:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 13:42:23,827 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:42:23,827 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:42:23,827 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:42:23,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:42:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2018-12-08 13:42:23,827 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:42:23,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:42:23,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:42:23,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:42:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 13:42:23,901 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:42:23,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-08 13:42:23,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 13:42:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 13:42:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-08 13:42:23,902 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2018-12-08 13:42:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:42:23,933 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-08 13:42:23,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 13:42:23,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-12-08 13:42:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:42:23,934 INFO L225 Difference]: With dead ends: 36 [2018-12-08 13:42:23,934 INFO L226 Difference]: Without dead ends: 32 [2018-12-08 13:42:23,934 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-08 13:42:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-08 13:42:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-08 13:42:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 13:42:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-08 13:42:23,937 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-12-08 13:42:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:42:23,937 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-08 13:42:23,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 13:42:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-08 13:42:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-08 13:42:23,938 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:42:23,938 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:42:23,938 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:42:23,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:42:23,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1423155149, now seen corresponding path program 1 times [2018-12-08 13:42:23,939 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:42:23,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:42:23,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:42:23,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:42:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 13:42:23,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:42:23,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 13:42:23,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 13:42:23,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 13:42:23,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:23,991 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-12-08 13:42:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:42:24,000 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-12-08 13:42:24,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 13:42:24,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-12-08 13:42:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:42:24,001 INFO L225 Difference]: With dead ends: 48 [2018-12-08 13:42:24,001 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 13:42:24,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 13:42:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-12-08 13:42:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 13:42:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-08 13:42:24,005 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-12-08 13:42:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:42:24,005 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-08 13:42:24,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 13:42:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-08 13:42:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-08 13:42:24,005 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:42:24,005 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:42:24,006 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:42:24,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:42:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1226641644, now seen corresponding path program 1 times [2018-12-08 13:42:24,006 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:42:24,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:42:24,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:24,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:42:24,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 13:42:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 13:42:24,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 13:42:24,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 13:42:24,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 13:42:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 13:42:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:24,047 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-12-08 13:42:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 13:42:24,055 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-08 13:42:24,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 13:42:24,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-12-08 13:42:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 13:42:24,056 INFO L225 Difference]: With dead ends: 40 [2018-12-08 13:42:24,056 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 13:42:24,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 13:42:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 13:42:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-12-08 13:42:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-08 13:42:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-08 13:42:24,059 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-12-08 13:42:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 13:42:24,060 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-08 13:42:24,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 13:42:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-08 13:42:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-08 13:42:24,060 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 13:42:24,060 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 13:42:24,061 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 13:42:24,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 13:42:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2018-12-08 13:42:24,061 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 13:42:24,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 13:42:24,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:24,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 13:42:24,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 13:42:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 13:42:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 13:42:24,095 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 13:42:24,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 01:42:24 BoogieIcfgContainer [2018-12-08 13:42:24,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 13:42:24,112 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 13:42:24,112 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 13:42:24,112 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 13:42:24,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 01:42:23" (3/4) ... [2018-12-08 13:42:24,114 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 13:42:24,142 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_83ddd6a0-edd2-4dd6-ae1f-4098e764efc3/bin-2019/uautomizer/witness.graphml [2018-12-08 13:42:24,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 13:42:24,142 INFO L168 Benchmark]: Toolchain (without parser) took 934.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 954.4 MB in the beginning and 991.3 MB in the end (delta: -36.9 MB). Peak memory consumption was 64.8 MB. Max. memory is 11.5 GB. [2018-12-08 13:42:24,143 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:42:24,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 120.29 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-08 13:42:24,143 INFO L168 Benchmark]: Boogie Procedure Inliner took 10.95 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:42:24,144 INFO L168 Benchmark]: Boogie Preprocessor took 9.78 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 13:42:24,144 INFO L168 Benchmark]: RCFGBuilder took 143.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -144.4 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-12-08 13:42:24,144 INFO L168 Benchmark]: TraceAbstraction took 618.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 993.9 MB in the end (delta: 94.0 MB). Peak memory consumption was 94.0 MB. Max. memory is 11.5 GB. [2018-12-08 13:42:24,144 INFO L168 Benchmark]: Witness Printer took 29.67 ms. Allocated memory is still 1.1 GB. Free memory was 993.9 MB in the beginning and 991.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-08 13:42:24,147 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 120.29 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 10.95 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.78 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -144.4 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 618.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 993.9 MB in the end (delta: 94.0 MB). Peak memory consumption was 94.0 MB. Max. memory is 11.5 GB. * Witness Printer took 29.67 ms. Allocated memory is still 1.1 GB. Free memory was 993.9 MB in the beginning and 991.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) VAL [\old(x)=2] [L8] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L15] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L16] CALL, EXPR id(x-1) VAL [\old(x)=0] [L8] COND TRUE x==0 [L8] return 0; VAL [\old(x)=0, \result=0, x=0] [L16] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L9] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L23] RET, EXPR id(input) VAL [id(input)=2, input=2] [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 VAL [input=2, result=2] [L25] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. UNSAFE Result, 0.5s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 142 SDtfs, 8 SDslu, 479 SDs, 0 SdLazy, 67 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 5478 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...