./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/brs2f.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd8964853d628053ec141f0834bb54931510ac76 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-19 22:10:26,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:10:26,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:10:26,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:10:26,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:10:26,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:10:26,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:10:26,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:10:26,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:10:26,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:10:26,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:10:26,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:10:26,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:10:26,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:10:26,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:10:26,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:10:26,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:10:26,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:10:26,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:10:26,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:10:26,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:10:26,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:10:26,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:10:26,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:10:26,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:10:26,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:10:26,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:10:26,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:10:26,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:10:26,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:10:26,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:10:26,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:10:26,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:10:26,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:10:26,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:10:26,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:10:26,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:10:26,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:10:26,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:10:26,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:10:26,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:10:26,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:10:26,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:10:26,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:10:26,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:10:26,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:10:26,391 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:10:26,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:10:26,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:10:26,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:10:26,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:10:26,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:10:26,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:10:26,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:10:26,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:10:26,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:10:26,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:10:26,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:10:26,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:10:26,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:10:26,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:10:26,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:10:26,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:10:26,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:10:26,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:10:26,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:10:26,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:10:26,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:10:26,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:10:26,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:10:26,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:10:26,399 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(reach_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 -> cd8964853d628053ec141f0834bb54931510ac76 [2020-10-19 22:10:26,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:10:26,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:10:26,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:10:26,667 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:10:26,668 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:10:26,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs2f.c [2020-10-19 22:10:26,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697b4f966/fbb2ff1e1fd64d2ca2296b17645fcfb8/FLAG4c159ae2e [2020-10-19 22:10:27,170 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:10:27,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs2f.c [2020-10-19 22:10:27,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697b4f966/fbb2ff1e1fd64d2ca2296b17645fcfb8/FLAG4c159ae2e [2020-10-19 22:10:27,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697b4f966/fbb2ff1e1fd64d2ca2296b17645fcfb8 [2020-10-19 22:10:27,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:10:27,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:10:27,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:10:27,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:10:27,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:10:27,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1009da41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27, skipping insertion in model container [2020-10-19 22:10:27,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:10:27,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:10:27,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:10:27,492 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:10:27,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:10:27,529 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:10:27,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27 WrapperNode [2020-10-19 22:10:27,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:10:27,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:10:27,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:10:27,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:10:27,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:10:27,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:10:27,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:10:27,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:10:27,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (1/1) ... [2020-10-19 22:10:27,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:10:27,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:10:27,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:10:27,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:10:27,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (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 [2020-10-19 22:10:27,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:10:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:10:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:10:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:10:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:10:27,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:10:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:10:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:10:28,056 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:10:28,056 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:10:28,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:10:28 BoogieIcfgContainer [2020-10-19 22:10:28,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:10:28,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:10:28,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:10:28,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:10:28,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:10:27" (1/3) ... [2020-10-19 22:10:28,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e881516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:10:28, skipping insertion in model container [2020-10-19 22:10:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:10:27" (2/3) ... [2020-10-19 22:10:28,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e881516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:10:28, skipping insertion in model container [2020-10-19 22:10:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:10:28" (3/3) ... [2020-10-19 22:10:28,068 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-10-19 22:10:28,081 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:10:28,089 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:10:28,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:10:28,133 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:10:28,134 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:10:28,134 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:10:28,134 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:10:28,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:10:28,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:10:28,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:10:28,135 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:10:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-19 22:10:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:10:28,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:28,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:28,157 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2020-10-19 22:10:28,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:28,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061687451] [2020-10-19 22:10:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:28,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061687451] [2020-10-19 22:10:28,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:10:28,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:10:28,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370073717] [2020-10-19 22:10:28,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:10:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:10:28,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:10:28,332 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-10-19 22:10:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:28,350 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2020-10-19 22:10:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:10:28,352 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-19 22:10:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:28,362 INFO L225 Difference]: With dead ends: 37 [2020-10-19 22:10:28,362 INFO L226 Difference]: Without dead ends: 16 [2020-10-19 22:10:28,365 INFO L677 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 [2020-10-19 22:10:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-19 22:10:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 22:10:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 22:10:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-19 22:10:28,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-10-19 22:10:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:28,408 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-19 22:10:28,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:10:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-10-19 22:10:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:10:28,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:28,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:28,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:10:28,411 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2020-10-19 22:10:28,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:28,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937426068] [2020-10-19 22:10:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:28,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937426068] [2020-10-19 22:10:28,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:10:28,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:10:28,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734452774] [2020-10-19 22:10:28,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:10:28,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:10:28,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:10:28,510 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2020-10-19 22:10:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:28,587 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-10-19 22:10:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:10:28,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 22:10:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:28,589 INFO L225 Difference]: With dead ends: 33 [2020-10-19 22:10:28,589 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 22:10:28,590 INFO L677 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 [2020-10-19 22:10:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 22:10:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-19 22:10:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 22:10:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-19 22:10:28,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2020-10-19 22:10:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:28,597 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-19 22:10:28,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:10:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-19 22:10:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 22:10:28,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:28,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:28,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:10:28,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:28,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2020-10-19 22:10:28,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:28,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618216502] [2020-10-19 22:10:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:10:28,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618216502] [2020-10-19 22:10:28,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:10:28,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 22:10:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89037847] [2020-10-19 22:10:28,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:10:28,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:28,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:10:28,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:10:28,718 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-10-19 22:10:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:28,784 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-19 22:10:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 22:10:28,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-19 22:10:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:28,785 INFO L225 Difference]: With dead ends: 27 [2020-10-19 22:10:28,786 INFO L226 Difference]: Without dead ends: 23 [2020-10-19 22:10:28,786 INFO L677 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 [2020-10-19 22:10:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-19 22:10:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-19 22:10:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-19 22:10:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-19 22:10:28,793 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-10-19 22:10:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:28,793 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-19 22:10:28,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:10:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-19 22:10:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:10:28,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:28,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:28,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 22:10:28,796 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:28,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2020-10-19 22:10:28,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:28,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454887330] [2020-10-19 22:10:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:28,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454887330] [2020-10-19 22:10:28,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828876234] [2020-10-19 22:10:28,912 INFO L95 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 [2020-10-19 22:10:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:10:29,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:10:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:29,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:10:29,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:10:29,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467829776] [2020-10-19 22:10:29,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:10:29,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:29,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:10:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:10:29,138 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2020-10-19 22:10:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:29,285 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-19 22:10:29,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 22:10:29,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-19 22:10:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:29,286 INFO L225 Difference]: With dead ends: 43 [2020-10-19 22:10:29,286 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 22:10:29,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-19 22:10:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 22:10:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-19 22:10:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-19 22:10:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-19 22:10:29,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2020-10-19 22:10:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:29,294 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-19 22:10:29,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:10:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-19 22:10:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 22:10:29,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:29,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:29,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:10:29,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2020-10-19 22:10:29,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:29,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594427006] [2020-10-19 22:10:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:30,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594427006] [2020-10-19 22:10:30,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313590937] [2020-10-19 22:10:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:10:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-19 22:10:30,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:10:30,320 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 22:10:30,329 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:10:30,337 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:10:30,337 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:10:30,338 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-10-19 22:10:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:10:30,412 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-10-19 22:10:30,414 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:10:30,429 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:10:30,430 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:10:30,430 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-10-19 22:10:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:10:30,549 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 25 [2020-10-19 22:10:30,550 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:10:30,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:10:30,562 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-19 22:10:30,563 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2020-10-19 22:10:30,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:10:30,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:10:30,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:10:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:30,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:10:30,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-10-19 22:10:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332535749] [2020-10-19 22:10:30,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-19 22:10:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-19 22:10:30,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-10-19 22:10:30,781 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2020-10-19 22:10:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:31,253 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-19 22:10:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 22:10:31,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2020-10-19 22:10:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:31,255 INFO L225 Difference]: With dead ends: 50 [2020-10-19 22:10:31,255 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 22:10:31,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-19 22:10:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 22:10:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-19 22:10:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 22:10:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-19 22:10:31,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-19 22:10:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:31,262 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-19 22:10:31,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-19 22:10:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-19 22:10:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 22:10:31,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:31,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:31,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:10:31,476 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2020-10-19 22:10:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:31,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747688363] [2020-10-19 22:10:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:10:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:31,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747688363] [2020-10-19 22:10:31,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970145576] [2020-10-19 22:10:31,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:10:31,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:10:31,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:10:31,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 22:10:31,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:10:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:10:31,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:10:31,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-10-19 22:10:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057231044] [2020-10-19 22:10:31,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 22:10:31,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:10:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 22:10:31,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-19 22:10:31,721 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 13 states. [2020-10-19 22:10:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:10:31,891 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-19 22:10:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 22:10:31,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-19 22:10:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:10:31,893 INFO L225 Difference]: With dead ends: 49 [2020-10-19 22:10:31,893 INFO L226 Difference]: Without dead ends: 34 [2020-10-19 22:10:31,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-19 22:10:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-19 22:10:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-19 22:10:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-19 22:10:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-19 22:10:31,902 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2020-10-19 22:10:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:10:31,903 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-19 22:10:31,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 22:10:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-19 22:10:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 22:10:31,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:10:31,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:10:32,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:10:32,127 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:10:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:10:32,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1507669223, now seen corresponding path program 3 times [2020-10-19 22:10:32,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:10:32,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376364212] [2020-10-19 22:10:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:10:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:10:32,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:10:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:10:32,198 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:10:32,225 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:10:32,226 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:10:32,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 22:10:32,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:10:32 BoogieIcfgContainer [2020-10-19 22:10:32,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:10:32,291 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:10:32,291 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:10:32,292 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:10:32,292 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:10:28" (3/4) ... [2020-10-19 22:10:32,295 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:10:32,358 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:10:32,358 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:10:32,360 INFO L168 Benchmark]: Toolchain (without parser) took 5155.69 ms. Allocated memory was 35.1 MB in the beginning and 60.3 MB in the end (delta: 25.2 MB). Free memory was 12.2 MB in the beginning and 26.1 MB in the end (delta: -14.0 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:32,361 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 34.1 MB. Free memory was 19.1 MB in the beginning and 19.1 MB in the end (delta: 40.3 kB). Peak memory consumption was 40.3 kB. Max. memory is 14.3 GB. [2020-10-19 22:10:32,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.43 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 11.3 MB in the beginning and 22.8 MB in the end (delta: -11.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:32,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.86 ms. Allocated memory is still 44.0 MB. Free memory was 22.8 MB in the beginning and 20.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:32,363 INFO L168 Benchmark]: Boogie Preprocessor took 26.31 ms. Allocated memory is still 44.0 MB. Free memory was 20.9 MB in the beginning and 19.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:32,364 INFO L168 Benchmark]: RCFGBuilder took 464.75 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 19.4 MB in the beginning and 14.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:32,365 INFO L168 Benchmark]: TraceAbstraction took 4231.06 ms. Allocated memory was 45.1 MB in the beginning and 60.3 MB in the end (delta: 15.2 MB). Free memory was 13.6 MB in the beginning and 30.5 MB in the end (delta: -16.9 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:10:32,365 INFO L168 Benchmark]: Witness Printer took 67.35 ms. Allocated memory is still 60.3 MB. Free memory was 30.5 MB in the beginning and 26.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:10:32,370 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 34.1 MB. Free memory was 19.1 MB in the beginning and 19.1 MB in the end (delta: 40.3 kB). Peak memory consumption was 40.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 320.43 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 11.3 MB in the beginning and 22.8 MB in the end (delta: -11.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.86 ms. Allocated memory is still 44.0 MB. Free memory was 22.8 MB in the beginning and 20.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.31 ms. Allocated memory is still 44.0 MB. Free memory was 20.9 MB in the beginning and 19.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 464.75 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 19.4 MB in the beginning and 14.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4231.06 ms. Allocated memory was 45.1 MB in the beginning and 60.3 MB in the end (delta: 15.2 MB). Free memory was 13.6 MB in the beginning and 30.5 MB in the end (delta: -16.9 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 67.35 ms. Allocated memory is still 60.3 MB. Free memory was 30.5 MB in the beginning and 26.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.3 MB. Max. memory is 14.3 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: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=3] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=3] [L31] COND TRUE i