./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3c39aff9 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/brs3f.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a1a7cbd6e991197932302f7777b8b708f1820cc0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-3c39aff [2019-11-27 18:43:38,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 18:43:38,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 18:43:38,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 18:43:38,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 18:43:38,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 18:43:38,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 18:43:38,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 18:43:38,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 18:43:38,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 18:43:38,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 18:43:38,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 18:43:38,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 18:43:38,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 18:43:38,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 18:43:38,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 18:43:38,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 18:43:38,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 18:43:38,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 18:43:38,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 18:43:38,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 18:43:38,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 18:43:38,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 18:43:38,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 18:43:38,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 18:43:38,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 18:43:38,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 18:43:38,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 18:43:38,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 18:43:38,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 18:43:38,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 18:43:38,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 18:43:38,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 18:43:38,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 18:43:38,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 18:43:38,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 18:43:38,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 18:43:38,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 18:43:38,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 18:43:38,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 18:43:38,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 18:43:38,287 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 18:43:38,321 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 18:43:38,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 18:43:38,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 18:43:38,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 18:43:38,328 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 18:43:38,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 18:43:38,329 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 18:43:38,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 18:43:38,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 18:43:38,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 18:43:38,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 18:43:38,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 18:43:38,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 18:43:38,332 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 18:43:38,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 18:43:38,333 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 18:43:38,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 18:43:38,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 18:43:38,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 18:43:38,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 18:43:38,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 18:43:38,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 18:43:38,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 18:43:38,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 18:43:38,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 18:43:38,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 18:43:38,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 18:43:38,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 18:43:38,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/UAutomizer-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 -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a1a7cbd6e991197932302f7777b8b708f1820cc0 [2019-11-27 18:43:38,639 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 18:43:38,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 18:43:38,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 18:43:38,658 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 18:43:38,658 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 18:43:38,659 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs3f.c [2019-11-27 18:43:38,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b602b4547/7239423cb7f1400da4f112809a93be81/FLAG1782b3f8d [2019-11-27 18:43:39,213 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 18:43:39,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs3f.c [2019-11-27 18:43:39,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b602b4547/7239423cb7f1400da4f112809a93be81/FLAG1782b3f8d [2019-11-27 18:43:39,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b602b4547/7239423cb7f1400da4f112809a93be81 [2019-11-27 18:43:39,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 18:43:39,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 18:43:39,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 18:43:39,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 18:43:39,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 18:43:39,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:39,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d1a952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39, skipping insertion in model container [2019-11-27 18:43:39,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:39,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 18:43:39,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 18:43:39,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 18:43:39,865 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 18:43:39,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 18:43:39,898 INFO L208 MainTranslator]: Completed translation [2019-11-27 18:43:39,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39 WrapperNode [2019-11-27 18:43:39,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 18:43:39,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 18:43:39,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 18:43:39,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 18:43:39,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:39,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:39,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 18:43:39,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 18:43:39,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 18:43:39,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 18:43:40,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:40,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:40,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:40,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:40,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:40,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:40,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... [2019-11-27 18:43:40,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 18:43:40,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 18:43:40,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 18:43:40,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 18:43:40,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2019-11-27 18:43:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 18:43:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 18:43:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 18:43:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 18:43:40,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 18:43:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 18:43:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 18:43:40,317 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 18:43:40,317 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-27 18:43:40,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 06:43:40 BoogieIcfgContainer [2019-11-27 18:43:40,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 18:43:40,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 18:43:40,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 18:43:40,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 18:43:40,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 06:43:39" (1/3) ... [2019-11-27 18:43:40,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bb274a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 06:43:40, skipping insertion in model container [2019-11-27 18:43:40,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 06:43:39" (2/3) ... [2019-11-27 18:43:40,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bb274a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 06:43:40, skipping insertion in model container [2019-11-27 18:43:40,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 06:43:40" (3/3) ... [2019-11-27 18:43:40,329 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2019-11-27 18:43:40,341 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 18:43:40,354 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 18:43:40,382 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 18:43:40,413 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 18:43:40,413 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 18:43:40,413 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 18:43:40,414 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 18:43:40,414 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 18:43:40,414 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 18:43:40,415 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 18:43:40,415 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 18:43:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-27 18:43:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 18:43:40,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 18:43:40,442 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 18:43:40,442 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 18:43:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 18:43:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1623807605, now seen corresponding path program 1 times [2019-11-27 18:43:40,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 18:43:40,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070619998] [2019-11-27 18:43:40,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 18:43:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 18:43:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 18:43:40,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070619998] [2019-11-27 18:43:40,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 18:43:40,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 18:43:40,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406458148] [2019-11-27 18:43:40,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 18:43:40,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 18:43:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 18:43:40,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 18:43:40,624 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-11-27 18:43:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 18:43:40,639 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-11-27 18:43:40,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 18:43:40,641 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-27 18:43:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 18:43:40,650 INFO L225 Difference]: With dead ends: 30 [2019-11-27 18:43:40,651 INFO L226 Difference]: Without dead ends: 14 [2019-11-27 18:43:40,653 INFO L630 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 [2019-11-27 18:43:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-27 18:43:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-27 18:43:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-27 18:43:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-27 18:43:40,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2019-11-27 18:43:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 18:43:40,686 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-27 18:43:40,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 18:43:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-27 18:43:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 18:43:40,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 18:43:40,687 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 18:43:40,688 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 18:43:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 18:43:40,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1308886944, now seen corresponding path program 1 times [2019-11-27 18:43:40,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 18:43:40,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354992834] [2019-11-27 18:43:40,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 18:43:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 18:43:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 18:43:40,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354992834] [2019-11-27 18:43:40,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 18:43:40,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 18:43:40,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215149135] [2019-11-27 18:43:40,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 18:43:40,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 18:43:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 18:43:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 18:43:40,762 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2019-11-27 18:43:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 18:43:40,845 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-11-27 18:43:40,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 18:43:40,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-27 18:43:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 18:43:40,846 INFO L225 Difference]: With dead ends: 28 [2019-11-27 18:43:40,846 INFO L226 Difference]: Without dead ends: 17 [2019-11-27 18:43:40,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 18:43:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-27 18:43:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-27 18:43:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-27 18:43:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-27 18:43:40,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2019-11-27 18:43:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 18:43:40,853 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-27 18:43:40,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 18:43:40,853 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-27 18:43:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-27 18:43:40,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 18:43:40,854 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 18:43:40,855 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 18:43:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 18:43:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1738269227, now seen corresponding path program 1 times [2019-11-27 18:43:40,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 18:43:40,856 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844447026] [2019-11-27 18:43:40,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 18:43:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 18:43:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 18:43:40,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844447026] [2019-11-27 18:43:40,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 18:43:40,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 18:43:40,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491919904] [2019-11-27 18:43:40,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 18:43:40,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 18:43:40,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 18:43:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 18:43:40,935 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2019-11-27 18:43:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 18:43:41,012 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2019-11-27 18:43:41,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 18:43:41,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-27 18:43:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 18:43:41,014 INFO L225 Difference]: With dead ends: 27 [2019-11-27 18:43:41,014 INFO L226 Difference]: Without dead ends: 20 [2019-11-27 18:43:41,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 18:43:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-27 18:43:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-27 18:43:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-27 18:43:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-27 18:43:41,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2019-11-27 18:43:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 18:43:41,024 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-27 18:43:41,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 18:43:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-27 18:43:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-27 18:43:41,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 18:43:41,027 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 18:43:41,027 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 18:43:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 18:43:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1896871737, now seen corresponding path program 1 times [2019-11-27 18:43:41,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 18:43:41,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222486276] [2019-11-27 18:43:41,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 18:43:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 18:43:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 18:43:41,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222486276] [2019-11-27 18:43:41,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 18:43:41,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-27 18:43:41,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667375002] [2019-11-27 18:43:41,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-27 18:43:41,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 18:43:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-27 18:43:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-27 18:43:41,153 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2019-11-27 18:43:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 18:43:41,226 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-11-27 18:43:41,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 18:43:41,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-27 18:43:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 18:43:41,228 INFO L225 Difference]: With dead ends: 25 [2019-11-27 18:43:41,228 INFO L226 Difference]: Without dead ends: 21 [2019-11-27 18:43:41,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-27 18:43:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-27 18:43:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-27 18:43:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-27 18:43:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-27 18:43:41,234 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2019-11-27 18:43:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 18:43:41,235 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-27 18:43:41,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-27 18:43:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-27 18:43:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-27 18:43:41,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 18:43:41,236 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 18:43:41,237 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 18:43:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 18:43:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1877487447, now seen corresponding path program 1 times [2019-11-27 18:43:41,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 18:43:41,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579690541] [2019-11-27 18:43:41,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 18:43:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 18:43:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 18:43:41,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579690541] [2019-11-27 18:43:41,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593142731] [2019-11-27 18:43:41,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 18:43:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 18:43:41,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 18:43:41,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 18:43:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 18:43:41,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 18:43:41,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-27 18:43:41,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340263025] [2019-11-27 18:43:41,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 18:43:41,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 18:43:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 18:43:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-27 18:43:41,538 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 10 states. [2019-11-27 18:43:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 18:43:41,719 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-11-27 18:43:41,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-27 18:43:41,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-27 18:43:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 18:43:41,720 INFO L225 Difference]: With dead ends: 41 [2019-11-27 18:43:41,721 INFO L226 Difference]: Without dead ends: 27 [2019-11-27 18:43:41,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-27 18:43:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-27 18:43:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-27 18:43:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-27 18:43:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-27 18:43:41,730 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2019-11-27 18:43:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 18:43:41,731 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-27 18:43:41,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 18:43:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-27 18:43:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-27 18:43:41,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 18:43:41,733 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 18:43:41,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 18:43:41,934 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 18:43:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 18:43:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1112618428, now seen corresponding path program 1 times [2019-11-27 18:43:41,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 18:43:41,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680404232] [2019-11-27 18:43:41,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 18:43:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 18:43:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 18:43:42,088 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 18:43:42,088 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 18:43:42,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 06:43:42 BoogieIcfgContainer [2019-11-27 18:43:42,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 18:43:42,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 18:43:42,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 18:43:42,125 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 18:43:42,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 06:43:40" (3/4) ... [2019-11-27 18:43:42,128 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 18:43:42,189 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 18:43:42,190 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 18:43:42,192 INFO L168 Benchmark]: Toolchain (without parser) took 2595.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 955.0 MB in the beginning and 1.0 GB in the end (delta: -64.7 MB). Peak memory consumption was 94.7 MB. Max. memory is 11.5 GB. [2019-11-27 18:43:42,193 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 18:43:42,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.50 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 18:43:42,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 944.3 MB in the beginning and 1.2 GB in the end (delta: -211.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-27 18:43:42,195 INFO L168 Benchmark]: Boogie Preprocessor took 28.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 18:43:42,195 INFO L168 Benchmark]: RCFGBuilder took 291.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2019-11-27 18:43:42,196 INFO L168 Benchmark]: TraceAbstraction took 1803.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.0 MB). Peak memory consumption was 104.0 MB. Max. memory is 11.5 GB. [2019-11-27 18:43:42,197 INFO L168 Benchmark]: Witness Printer took 65.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 18:43:42,201 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 303.50 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 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 97.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 944.3 MB in the beginning and 1.2 GB in the end (delta: -211.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 291.87 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1803.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 104.0 MB). Peak memory consumption was 104.0 MB. Max. memory is 11.5 GB. * Witness Printer took 65.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] i=0 VAL [N=2] [L26] COND TRUE i