/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:50:22,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:50:22,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:50:22,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:50:22,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:50:22,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:50:22,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:50:22,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:50:22,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:50:22,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:50:22,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:50:22,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:50:22,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:50:22,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:50:22,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:50:22,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:50:22,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:50:22,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:50:22,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:50:22,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:50:22,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:50:22,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:50:22,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:50:22,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:50:22,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:50:22,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:50:22,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:50:22,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:50:22,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:50:22,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:50:22,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:50:22,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:50:22,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:50:22,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:50:22,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:50:22,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:50:22,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:50:22,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:50:22,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:50:22,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:50:22,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:50:22,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:50:22,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:50:22,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:50:22,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:50:22,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:50:22,341 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:50:22,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:50:22,342 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:50:22,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:50:22,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:50:22,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:50:22,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:50:22,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:50:22,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:50:22,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:50:22,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:50:22,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:50:22,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:50:22,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:50:22,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:50:22,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:50:22,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:50:22,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:50:22,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:50:22,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:50:22,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:50:22,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:50:22,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:50:22,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:50:22,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:50:22,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:50:22,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:50:22,657 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:50:22,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:50:22,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:50:22,662 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:50:22,665 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-21 15:50:22,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86a47c507/eca1cb7f9da04d4e845a69e5caaad4f0/FLAGe2805ef44 [2020-08-21 15:50:23,238 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:50:23,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-21 15:50:23,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86a47c507/eca1cb7f9da04d4e845a69e5caaad4f0/FLAGe2805ef44 [2020-08-21 15:50:23,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86a47c507/eca1cb7f9da04d4e845a69e5caaad4f0 [2020-08-21 15:50:23,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:50:23,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:50:23,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:50:23,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:50:23,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:50:23,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:23,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72eb96f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23, skipping insertion in model container [2020-08-21 15:50:23,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:23,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:50:23,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:50:23,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:50:23,868 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:50:23,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:50:23,988 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:50:23,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23 WrapperNode [2020-08-21 15:50:23,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:50:23,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:50:23,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:50:23,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:50:24,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... [2020-08-21 15:50:24,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:50:24,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:50:24,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:50:24,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:50:24,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 15:50:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:50:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:50:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:50:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:50:24,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:50:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:50:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:50:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:50:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:50:24,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:50:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 15:50:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:50:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:50:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 15:50:24,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:50:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:50:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:50:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:50:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:50:24,398 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:50:24,398 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 15:50:24,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:50:24 BoogieIcfgContainer [2020-08-21 15:50:24,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:50:24,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:50:24,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:50:24,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:50:24,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:50:23" (1/3) ... [2020-08-21 15:50:24,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e507da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:50:24, skipping insertion in model container [2020-08-21 15:50:24,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:50:23" (2/3) ... [2020-08-21 15:50:24,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e507da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:50:24, skipping insertion in model container [2020-08-21 15:50:24,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:50:24" (3/3) ... [2020-08-21 15:50:24,412 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-08-21 15:50:24,425 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:50:24,433 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:50:24,449 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:50:24,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:50:24,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:50:24,476 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:50:24,477 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:50:24,477 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:50:24,477 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:50:24,477 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:50:24,477 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:50:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 15:50:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:50:24,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:24,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:24,506 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-21 15:50:24,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:24,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454402116] [2020-08-21 15:50:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:24,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:24,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:50:24,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454402116] [2020-08-21 15:50:24,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:50:24,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:50:24,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281291471] [2020-08-21 15:50:24,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:50:24,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:50:24,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:50:24,774 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-21 15:50:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:24,885 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-21 15:50:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:50:24,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:50:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:24,899 INFO L225 Difference]: With dead ends: 56 [2020-08-21 15:50:24,899 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 15:50:24,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:50:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 15:50:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 15:50:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 15:50:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 15:50:24,953 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-21 15:50:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:24,954 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 15:50:24,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:50:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 15:50:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:50:24,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:24,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:24,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:50:24,957 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-21 15:50:24,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:24,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826002208] [2020-08-21 15:50:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:50:25,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826002208] [2020-08-21 15:50:25,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:50:25,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:50:25,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863107388] [2020-08-21 15:50:25,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:50:25,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:25,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:50:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:50:25,105 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-21 15:50:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:25,229 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 15:50:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:50:25,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 15:50:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:25,232 INFO L225 Difference]: With dead ends: 45 [2020-08-21 15:50:25,232 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 15:50:25,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:50:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 15:50:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 15:50:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 15:50:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-21 15:50:25,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-21 15:50:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:25,243 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-21 15:50:25,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:50:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-21 15:50:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:50:25,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:25,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:25,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:50:25,245 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:25,246 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-21 15:50:25,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:25,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165974978] [2020-08-21 15:50:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 15:50:25,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165974978] [2020-08-21 15:50:25,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:50:25,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:50:25,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821018093] [2020-08-21 15:50:25,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:50:25,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:25,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:50:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:50:25,474 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-21 15:50:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:25,690 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-21 15:50:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:50:25,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-21 15:50:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:25,691 INFO L225 Difference]: With dead ends: 39 [2020-08-21 15:50:25,692 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 15:50:25,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:50:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 15:50:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 15:50:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 15:50:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-21 15:50:25,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-21 15:50:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:25,701 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-21 15:50:25,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:50:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-21 15:50:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 15:50:25,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:25,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:25,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:50:25,703 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-21 15:50:25,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:25,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368090115] [2020-08-21 15:50:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:50:25,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368090115] [2020-08-21 15:50:25,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:50:25,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 15:50:25,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943891356] [2020-08-21 15:50:25,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:50:25,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:50:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:50:25,815 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-21 15:50:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:25,980 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-21 15:50:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:50:25,981 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-21 15:50:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:25,982 INFO L225 Difference]: With dead ends: 54 [2020-08-21 15:50:25,982 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 15:50:25,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:50:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 15:50:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-21 15:50:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 15:50:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-21 15:50:25,990 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-21 15:50:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:25,990 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-21 15:50:25,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:50:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-21 15:50:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 15:50:25,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:25,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:25,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:50:25,992 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:25,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:25,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-21 15:50:25,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:25,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536749506] [2020-08-21 15:50:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 15:50:26,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536749506] [2020-08-21 15:50:26,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:50:26,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:50:26,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560130667] [2020-08-21 15:50:26,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:50:26,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:26,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:50:26,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:50:26,092 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-21 15:50:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:26,186 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-21 15:50:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:50:26,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-21 15:50:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:26,188 INFO L225 Difference]: With dead ends: 55 [2020-08-21 15:50:26,188 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 15:50:26,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:50:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 15:50:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-21 15:50:26,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 15:50:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-21 15:50:26,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-21 15:50:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:26,196 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-21 15:50:26,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:50:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-21 15:50:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 15:50:26,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:26,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:26,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:50:26,198 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-21 15:50:26,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:26,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125140413] [2020-08-21 15:50:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:50:26,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125140413] [2020-08-21 15:50:26,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:50:26,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 15:50:26,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703066633] [2020-08-21 15:50:26,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 15:50:26,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 15:50:26,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:50:26,475 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-21 15:50:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:26,938 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 15:50:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 15:50:26,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-08-21 15:50:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:26,940 INFO L225 Difference]: With dead ends: 46 [2020-08-21 15:50:26,940 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 15:50:26,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-08-21 15:50:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 15:50:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-21 15:50:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 15:50:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-08-21 15:50:26,955 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-08-21 15:50:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:26,958 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-08-21 15:50:26,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 15:50:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-08-21 15:50:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 15:50:26,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:26,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:26,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:50:26,960 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-08-21 15:50:26,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:26,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437324338] [2020-08-21 15:50:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:27,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:50:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:27,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 15:50:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:50:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:50:27,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437324338] [2020-08-21 15:50:27,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:50:27,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:50:27,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691491134] [2020-08-21 15:50:27,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:50:27,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:50:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:50:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:50:27,118 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-08-21 15:50:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:50:27,301 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-08-21 15:50:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 15:50:27,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-21 15:50:27,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:50:27,303 INFO L225 Difference]: With dead ends: 66 [2020-08-21 15:50:27,303 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 15:50:27,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:50:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 15:50:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-21 15:50:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 15:50:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-21 15:50:27,310 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-08-21 15:50:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:50:27,311 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-21 15:50:27,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:50:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-21 15:50:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 15:50:27,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:50:27,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:50:27,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:50:27,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:50:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:50:27,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-08-21 15:50:27,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:50:27,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939479062] [2020-08-21 15:50:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:50:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:50:27,348 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:50:27,348 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:50:27,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:50:27,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:50:27 BoogieIcfgContainer [2020-08-21 15:50:27,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:50:27,376 INFO L168 Benchmark]: Toolchain (without parser) took 3744.27 ms. Allocated memory was 141.6 MB in the beginning and 242.7 MB in the end (delta: 101.2 MB). Free memory was 104.3 MB in the beginning and 107.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 98.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:27,377 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:50:27,378 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.88 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 104.1 MB in the beginning and 183.5 MB in the end (delta: -79.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:27,379 INFO L168 Benchmark]: Boogie Preprocessor took 44.26 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 181.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:27,379 INFO L168 Benchmark]: RCFGBuilder took 369.91 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 164.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:27,380 INFO L168 Benchmark]: TraceAbstraction took 2967.93 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 163.9 MB in the beginning and 107.3 MB in the end (delta: 56.6 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:50:27,384 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.88 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 104.1 MB in the beginning and 183.5 MB in the end (delta: -79.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.26 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 181.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.91 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 164.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2967.93 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 163.9 MB in the beginning and 107.3 MB in the end (delta: 56.6 MB). Peak memory consumption was 94.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i