./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block SingleStatement --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 --rcfgbuilder.size.of.a.code.block SingleStatement ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-0210da8 [2018-10-22 09:40:19,126 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 09:40:19,128 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 09:40:19,141 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 09:40:19,141 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 09:40:19,142 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 09:40:19,144 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 09:40:19,146 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 09:40:19,148 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 09:40:19,149 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 09:40:19,150 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 09:40:19,150 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 09:40:19,152 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 09:40:19,153 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 09:40:19,154 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 09:40:19,155 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 09:40:19,156 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 09:40:19,158 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 09:40:19,161 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 09:40:19,163 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 09:40:19,164 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 09:40:19,166 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 09:40:19,168 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 09:40:19,169 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 09:40:19,169 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 09:40:19,170 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 09:40:19,171 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 09:40:19,173 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 09:40:19,174 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 09:40:19,175 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 09:40:19,176 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 09:40:19,176 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 09:40:19,177 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 09:40:19,177 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 09:40:19,178 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 09:40:19,179 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 09:40:19,180 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 09:40:19,196 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 09:40:19,197 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 09:40:19,197 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 09:40:19,198 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 09:40:19,198 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 09:40:19,198 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 09:40:19,199 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 09:40:19,199 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 09:40:19,199 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 09:40:19,199 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 09:40:19,199 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 09:40:19,201 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 09:40:19,201 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 09:40:19,201 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 09:40:19,202 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 09:40:19,202 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 09:40:19,202 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 09:40:19,202 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 09:40:19,202 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 09:40:19,202 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 09:40:19,204 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 09:40:19,204 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 09:40:19,204 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 09:40:19,204 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 09:40:19,204 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 09:40:19,204 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 09:40:19,205 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:40:19,205 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 09:40:19,205 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 09:40:19,205 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 09:40:19,205 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 09:40:19,206 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 09:40:19,207 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 09:40:19,207 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 09:40:19,207 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement [2018-10-22 09:40:19,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 09:40:19,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 09:40:19,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 09:40:19,280 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 09:40:19,281 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 09:40:19,282 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i [2018-10-22 09:40:19,348 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e80461c88/de96695653b647f6bebb0123cde37a13/FLAGbb14c994d [2018-10-22 09:40:19,903 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 09:40:19,904 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_false-unreach-call_true-termination.i [2018-10-22 09:40:19,912 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e80461c88/de96695653b647f6bebb0123cde37a13/FLAGbb14c994d [2018-10-22 09:40:19,929 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e80461c88/de96695653b647f6bebb0123cde37a13 [2018-10-22 09:40:19,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 09:40:19,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 09:40:19,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:19,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 09:40:19,942 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 09:40:19,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:19" (1/1) ... [2018-10-22 09:40:19,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550d8001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:19, skipping insertion in model container [2018-10-22 09:40:19,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:40:19" (1/1) ... [2018-10-22 09:40:19,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 09:40:19,990 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 09:40:20,198 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:20,203 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 09:40:20,222 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 09:40:20,239 INFO L193 MainTranslator]: Completed translation [2018-10-22 09:40:20,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20 WrapperNode [2018-10-22 09:40:20,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 09:40:20,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:20,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 09:40:20,241 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 09:40:20,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 09:40:20,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 09:40:20,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 09:40:20,263 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 09:40:20,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... [2018-10-22 09:40:20,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 09:40:20,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 09:40:20,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 09:40:20,284 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 09:40:20,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 09:40:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 09:40:20,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 09:40:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 09:40:20,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 09:40:20,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 09:40:20,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 09:40:20,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 09:40:20,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 09:40:20,722 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 09:40:20,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:20 BoogieIcfgContainer [2018-10-22 09:40:20,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 09:40:20,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 09:40:20,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 09:40:20,739 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 09:40:20,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:40:19" (1/3) ... [2018-10-22 09:40:20,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7ecf73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:20, skipping insertion in model container [2018-10-22 09:40:20,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:40:20" (2/3) ... [2018-10-22 09:40:20,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7ecf73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:40:20, skipping insertion in model container [2018-10-22 09:40:20,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:20" (3/3) ... [2018-10-22 09:40:20,749 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_false-unreach-call_true-termination.i [2018-10-22 09:40:20,772 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 09:40:20,783 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 09:40:20,797 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 09:40:20,834 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 09:40:20,835 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 09:40:20,835 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 09:40:20,835 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 09:40:20,835 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 09:40:20,835 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 09:40:20,836 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 09:40:20,836 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 09:40:20,836 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 09:40:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-10-22 09:40:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 09:40:20,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:20,864 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:20,869 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:20,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2018-10-22 09:40:20,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:20,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:20,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:20,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:20,931 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:21,006 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:21,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 09:40:21,006 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:21,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 09:40:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 09:40:21,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:40:21,027 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-10-22 09:40:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:21,050 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2018-10-22 09:40:21,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 09:40:21,052 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-10-22 09:40:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:21,063 INFO L225 Difference]: With dead ends: 38 [2018-10-22 09:40:21,063 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 09:40:21,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 09:40:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 09:40:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-22 09:40:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 09:40:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-22 09:40:21,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2018-10-22 09:40:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:21,113 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-22 09:40:21,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 09:40:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-22 09:40:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 09:40:21,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:21,116 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:21,116 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:21,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -929659450, now seen corresponding path program 1 times [2018-10-22 09:40:21,117 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:21,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:21,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:21,121 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:21,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 09:40:21,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 09:40:21,243 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 09:40:21,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 09:40:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 09:40:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 09:40:21,247 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-22 09:40:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:21,330 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-22 09:40:21,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 09:40:21,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-22 09:40:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:21,333 INFO L225 Difference]: With dead ends: 33 [2018-10-22 09:40:21,333 INFO L226 Difference]: Without dead ends: 28 [2018-10-22 09:40:21,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 09:40:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-22 09:40:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-22 09:40:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-22 09:40:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-10-22 09:40:21,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2018-10-22 09:40:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:21,345 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-10-22 09:40:21,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 09:40:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-10-22 09:40:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 09:40:21,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:21,348 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:21,348 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:21,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1774306758, now seen corresponding path program 1 times [2018-10-22 09:40:21,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:21,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:21,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:21,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:21,354 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:21,922 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-10-22 09:40:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:22,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:22,229 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:22,230 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-22 09:40:22,232 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [12], [15], [17], [20], [21], [25], [26], [27], [33], [36], [38], [44], [45], [46], [48] [2018-10-22 09:40:22,287 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:40:22,288 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:40:22,431 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 09:40:23,006 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:40:23,007 INFO L272 AbstractInterpreter]: Visited 21 different actions 212 times. Merged at 8 different actions 128 times. Widened at 1 different actions 12 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-22 09:40:23,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:23,029 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:40:23,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:23,030 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:40:23,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:23,045 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:40:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:23,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:23,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:24,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:24,399 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:24,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:24,429 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:40:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:24,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:24,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:24,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:24,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 26 [2018-10-22 09:40:24,555 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:24,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 09:40:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 09:40:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2018-10-22 09:40:24,559 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2018-10-22 09:40:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:25,111 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2018-10-22 09:40:25,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 09:40:25,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-10-22 09:40:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:25,118 INFO L225 Difference]: With dead ends: 53 [2018-10-22 09:40:25,118 INFO L226 Difference]: Without dead ends: 32 [2018-10-22 09:40:25,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2018-10-22 09:40:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-22 09:40:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-22 09:40:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-22 09:40:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-22 09:40:25,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 22 [2018-10-22 09:40:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:25,126 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-22 09:40:25,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 09:40:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-22 09:40:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 09:40:25,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:25,127 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:25,127 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:25,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash -733193402, now seen corresponding path program 2 times [2018-10-22 09:40:25,129 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:25,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:25,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:25,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:25,131 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-22 09:40:25,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:25,463 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:25,463 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:25,463 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:25,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:25,464 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 09:40:25,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:40:25,472 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:25,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:40:25,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:25,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:25,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:26,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:26,418 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:26,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:40:26,434 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:26,455 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:40:26,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:26,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:26,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:26,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:26,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14, 14, 14] total 34 [2018-10-22 09:40:26,700 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:26,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 09:40:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 09:40:26,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 09:40:26,702 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 22 states. [2018-10-22 09:40:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:28,185 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2018-10-22 09:40:28,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 09:40:28,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2018-10-22 09:40:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:28,190 INFO L225 Difference]: With dead ends: 64 [2018-10-22 09:40:28,190 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 09:40:28,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 09:40:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 09:40:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2018-10-22 09:40:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-22 09:40:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-22 09:40:28,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 29 [2018-10-22 09:40:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:28,200 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-22 09:40:28,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 09:40:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-22 09:40:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-22 09:40:28,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:28,201 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:28,202 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:28,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash -594366366, now seen corresponding path program 1 times [2018-10-22 09:40:28,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:28,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:28,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:28,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:28,203 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:28,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:28,305 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:28,305 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-10-22 09:40:28,305 INFO L202 CegarAbsIntRunner]: [0], [4], [5], [6], [7], [8], [12], [15], [17], [20], [21], [23], [25], [26], [27], [33], [36], [38], [44], [45], [46], [48] [2018-10-22 09:40:28,307 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 09:40:28,307 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 09:40:28,314 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 09:40:28,640 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 09:40:28,640 INFO L272 AbstractInterpreter]: Visited 22 different actions 403 times. Merged at 9 different actions 250 times. Widened at 1 different actions 23 times. Found 25 fixpoints after 4 different actions. Largest state had 5 variables. [2018-10-22 09:40:28,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:28,667 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 09:40:28,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:28,667 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:28,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:28,684 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:40:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:28,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:28,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:29,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:29,246 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:29,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:29,261 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 09:40:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:29,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:29,291 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:29,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:29,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-10-22 09:40:29,310 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:29,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 09:40:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 09:40:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-10-22 09:40:29,311 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 9 states. [2018-10-22 09:40:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:29,436 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-10-22 09:40:29,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 09:40:29,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2018-10-22 09:40:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:29,439 INFO L225 Difference]: With dead ends: 67 [2018-10-22 09:40:29,439 INFO L226 Difference]: Without dead ends: 55 [2018-10-22 09:40:29,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2018-10-22 09:40:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-22 09:40:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2018-10-22 09:40:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-22 09:40:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-22 09:40:29,449 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 42 [2018-10-22 09:40:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:29,449 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-22 09:40:29,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 09:40:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-22 09:40:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 09:40:29,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:29,452 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:29,452 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:29,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:29,453 INFO L82 PathProgramCache]: Analyzing trace with hash -697183378, now seen corresponding path program 2 times [2018-10-22 09:40:29,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:29,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:29,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 09:40:29,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:29,454 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:29,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:29,629 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:29,629 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:29,629 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:29,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:29,629 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:29,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:40:29,638 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:29,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:40:29,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:29,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:29,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:29,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:29,844 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:29,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 09:40:29,862 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:29,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 09:40:29,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:29,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:29,907 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:30,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:30,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 19 [2018-10-22 09:40:30,017 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:30,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 09:40:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 09:40:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-22 09:40:30,022 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 11 states. [2018-10-22 09:40:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:30,290 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2018-10-22 09:40:30,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 09:40:30,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-10-22 09:40:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:30,292 INFO L225 Difference]: With dead ends: 74 [2018-10-22 09:40:30,293 INFO L226 Difference]: Without dead ends: 62 [2018-10-22 09:40:30,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2018-10-22 09:40:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-22 09:40:30,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2018-10-22 09:40:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 09:40:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-22 09:40:30,300 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 49 [2018-10-22 09:40:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:30,301 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-22 09:40:30,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 09:40:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-22 09:40:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-22 09:40:30,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:30,303 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:30,303 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:30,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:30,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2070112994, now seen corresponding path program 3 times [2018-10-22 09:40:30,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:30,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:30,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:30,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:30,305 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:30,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:30,455 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:30,455 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:30,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:30,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:30,456 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:30,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:40:30,474 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:40:30,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-22 09:40:30,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:30,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:30,509 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:30,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:30,772 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:30,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 09:40:30,788 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 09:40:30,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-22 09:40:30,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:30,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:30,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:31,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:31,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 19 [2018-10-22 09:40:31,092 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:31,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 09:40:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 09:40:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-22 09:40:31,093 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 13 states. [2018-10-22 09:40:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:31,282 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-10-22 09:40:31,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 09:40:31,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2018-10-22 09:40:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:31,284 INFO L225 Difference]: With dead ends: 81 [2018-10-22 09:40:31,284 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 09:40:31,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2018-10-22 09:40:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 09:40:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-10-22 09:40:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-22 09:40:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-22 09:40:31,293 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 56 [2018-10-22 09:40:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:31,293 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-22 09:40:31,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 09:40:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-22 09:40:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-22 09:40:31,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:31,295 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:31,295 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:31,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2027047150, now seen corresponding path program 4 times [2018-10-22 09:40:31,295 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:31,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:31,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:31,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:31,297 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:31,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:31,448 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:31,448 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:31,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:31,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:31,449 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:31,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:40:31,457 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:40:31,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:40:31,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:31,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:31,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:31,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:31,711 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:31,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 09:40:31,727 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 09:40:31,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 09:40:31,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:31,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:31,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:31,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:31,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15] total 19 [2018-10-22 09:40:31,866 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:31,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 09:40:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 09:40:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-22 09:40:31,867 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-10-22 09:40:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:32,149 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2018-10-22 09:40:32,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 09:40:32,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-10-22 09:40:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:32,151 INFO L225 Difference]: With dead ends: 88 [2018-10-22 09:40:32,151 INFO L226 Difference]: Without dead ends: 76 [2018-10-22 09:40:32,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 230 SyntacticMatches, 18 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2018-10-22 09:40:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-22 09:40:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-10-22 09:40:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-22 09:40:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-22 09:40:32,160 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2018-10-22 09:40:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:32,160 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-22 09:40:32,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 09:40:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-22 09:40:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 09:40:32,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:32,162 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:32,162 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:32,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1193002338, now seen corresponding path program 5 times [2018-10-22 09:40:32,162 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:32,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:32,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:32,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:32,163 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 37 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:32,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:32,342 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:32,342 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:32,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:32,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:32,343 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:32,352 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:40:32,352 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:32,377 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-22 09:40:32,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:32,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 37 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:32,389 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 37 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:32,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:32,766 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:32,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 09:40:32,785 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 09:40:32,866 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-22 09:40:32,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:32,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 37 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:32,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 37 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:33,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:33,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17] total 19 [2018-10-22 09:40:33,226 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:33,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 09:40:33,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 09:40:33,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-22 09:40:33,227 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 17 states. [2018-10-22 09:40:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:33,615 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-10-22 09:40:33,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 09:40:33,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2018-10-22 09:40:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:33,618 INFO L225 Difference]: With dead ends: 95 [2018-10-22 09:40:33,619 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 09:40:33,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 252 SyntacticMatches, 26 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=365, Invalid=691, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 09:40:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 09:40:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2018-10-22 09:40:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 09:40:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-22 09:40:33,627 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 70 [2018-10-22 09:40:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:33,628 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-22 09:40:33,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 09:40:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-22 09:40:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-22 09:40:33,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:33,629 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:33,630 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:33,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1468588434, now seen corresponding path program 6 times [2018-10-22 09:40:33,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:33,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:33,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:33,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:33,631 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 09:40:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 42 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:33,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:33,852 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 09:40:33,853 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 09:40:33,853 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 09:40:33,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:33,853 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 09:40:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:40:33,861 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:40:33,885 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-22 09:40:33,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:33,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 42 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:33,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 42 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:34,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 09:40:34,067 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 09:40:34,083 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 09:40:34,083 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 09:40:34,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-22 09:40:34,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 09:40:34,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 09:40:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 42 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:34,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 09:40:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 42 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 09:40:34,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 09:40:34,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19] total 19 [2018-10-22 09:40:34,317 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 09:40:34,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 09:40:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 09:40:34,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-10-22 09:40:34,318 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 19 states. [2018-10-22 09:40:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 09:40:34,736 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-10-22 09:40:34,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 09:40:34,737 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2018-10-22 09:40:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 09:40:34,738 INFO L225 Difference]: With dead ends: 101 [2018-10-22 09:40:34,739 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 09:40:34,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 274 SyntacticMatches, 34 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 09:40:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 09:40:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-22 09:40:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-22 09:40:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-22 09:40:34,749 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2018-10-22 09:40:34,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 09:40:34,749 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-22 09:40:34,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 09:40:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-22 09:40:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-22 09:40:34,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 09:40:34,753 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 09:40:34,753 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 09:40:34,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 09:40:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1105444834, now seen corresponding path program 7 times [2018-10-22 09:40:34,753 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 09:40:34,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:34,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 09:40:34,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 09:40:34,756 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 09:40:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 09:40:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 09:40:34,809 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 09:40:34,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:40:34 BoogieIcfgContainer [2018-10-22 09:40:34,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 09:40:34,875 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 09:40:34,875 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 09:40:34,875 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 09:40:34,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:40:20" (3/4) ... [2018-10-22 09:40:34,886 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-22 09:40:34,992 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 09:40:34,992 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 09:40:34,993 INFO L168 Benchmark]: Toolchain (without parser) took 15058.76 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 312.5 MB). Free memory was 949.2 MB in the beginning and 1.2 GB in the end (delta: -217.0 MB). Peak memory consumption was 95.5 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:34,998 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:34,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.91 ms. Allocated memory is still 1.0 GB. Free memory was 949.2 MB in the beginning and 938.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:34,999 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.98 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:34,999 INFO L168 Benchmark]: Boogie Preprocessor took 21.30 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:34,999 INFO L168 Benchmark]: RCFGBuilder took 439.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 938.4 MB in the beginning and 1.1 GB in the end (delta: -192.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:35,000 INFO L168 Benchmark]: TraceAbstraction took 14149.97 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 166.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -34.9 MB). Peak memory consumption was 131.8 MB. Max. memory is 11.5 GB. [2018-10-22 09:40:35,001 INFO L168 Benchmark]: Witness Printer took 117.36 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 09:40:35,006 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 302.91 ms. Allocated memory is still 1.0 GB. Free memory was 949.2 MB in the beginning and 938.4 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 20.98 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.30 ms. Allocated memory is still 1.0 GB. Free memory is still 938.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 439.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 938.4 MB in the beginning and 1.1 GB in the end (delta: -192.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14149.97 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 166.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -34.9 MB). Peak memory consumption was 131.8 MB. Max. memory is 11.5 GB. * Witness Printer took 117.36 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=10, n=10] [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; VAL [n=10, n=0] [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=0, n=10] [L14] COND TRUE i<10 VAL [i=1, n=10, n=0] [L15] sn = sn + (2) VAL [i=1, n=2, n=10] [L13] i++ VAL [i=2, n=10, n=2] [L13] COND TRUE i<=n VAL [i=2, n=10, n=2] [L14] COND TRUE i<10 VAL [i=2, n=2, n=10] [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=4, n=10] [L14] COND TRUE i<10 VAL [i=3, n=4, n=10] [L15] sn = sn + (2) VAL [i=3, n=10, n=6] [L13] i++ VAL [i=4, n=10, n=6] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 VAL [i=4, n=6, n=10] [L15] sn = sn + (2) VAL [i=4, n=10, n=8] [L13] i++ VAL [i=5, n=10, n=8] [L13] COND TRUE i<=n VAL [i=5, n=8, n=10] [L14] COND TRUE i<10 VAL [i=5, n=10, n=8] [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 VAL [i=6, n=10, n=10] [L15] sn = sn + (2) VAL [i=6, n=10, n=12] [L13] i++ VAL [i=7, n=12, n=10] [L13] COND TRUE i<=n VAL [i=7, n=10, n=12] [L14] COND TRUE i<10 VAL [i=7, n=12, n=10] [L15] sn = sn + (2) VAL [i=7, n=14, n=10] [L13] i++ VAL [i=8, n=10, n=14] [L13] COND TRUE i<=n VAL [i=8, n=14, n=10] [L14] COND TRUE i<10 VAL [i=8, n=14, n=10] [L15] sn = sn + (2) VAL [i=8, n=16, n=10] [L13] i++ VAL [i=9, n=16, n=10] [L13] COND TRUE i<=n VAL [i=9, n=16, n=10] [L14] COND TRUE i<10 VAL [i=9, n=10, n=16] [L15] sn = sn + (2) VAL [i=9, n=18, n=10] [L13] i++ VAL [i=10, n=18, n=10] [L13] COND TRUE i<=n VAL [i=10, n=10, n=18] [L14] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L13] i++ VAL [i=11, n=10, n=18] [L13] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. UNSAFE Result, 14.0s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 3.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 190 SDtfs, 178 SDslu, 1271 SDs, 0 SdLazy, 829 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1820 GetRequests, 1476 SyntacticMatches, 98 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 22 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 1337 NumberOfCodeBlocks, 1335 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 2027 ConstructedInterpolants, 26 QuantifiedInterpolants, 319345 SizeOfPredicates, 172 NumberOfNonLiveVariables, 1276 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 42 InterpolantComputations, 2 PerfectInterpolantSequences, 887/4350 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...