/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=HIGHLEXORDER --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/condgf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:03:40,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:03:40,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:03:40,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:03:40,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:03:40,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:03:40,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:03:40,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:03:40,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:03:40,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:03:40,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:03:40,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:03:40,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:03:40,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:03:40,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:03:40,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:03:40,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:03:40,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:03:40,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:03:40,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:03:40,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:03:40,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:03:40,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:03:40,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:03:40,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:03:40,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:03:40,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:03:40,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:03:40,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:03:40,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:03:40,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:03:40,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:03:40,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:03:40,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:03:40,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:03:40,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:03:40,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:03:40,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:03:40,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:03:40,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:03:40,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:03:40,406 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 19:03:40,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:03:40,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:03:40,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:03:40,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:03:40,448 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:03:40,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:03:40,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:03:40,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:03:40,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:03:40,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:03:40,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:03:40,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:03:40,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:03:40,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:03:40,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:03:40,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:03:40,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:03:40,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:03:40,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:03:40,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:03:40,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:03:40,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:03:40,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:03:40,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:03:40,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:03:40,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:03:40,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:03:40,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:03:40,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:03:40,454 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=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 19:03:40,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:03:40,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:03:40,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:03:40,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:03:40,798 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:03:40,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condgf.c [2020-08-21 19:03:40,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9728bde4f/fdc69769b8414c83baa62498dd107bf4/FLAGa0348edf6 [2020-08-21 19:03:41,348 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:03:41,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condgf.c [2020-08-21 19:03:41,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9728bde4f/fdc69769b8414c83baa62498dd107bf4/FLAGa0348edf6 [2020-08-21 19:03:41,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9728bde4f/fdc69769b8414c83baa62498dd107bf4 [2020-08-21 19:03:41,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:03:41,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:03:41,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:03:41,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:03:41,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:03:41,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:03:41" (1/1) ... [2020-08-21 19:03:41,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249e641f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:41, skipping insertion in model container [2020-08-21 19:03:41,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:03:41" (1/1) ... [2020-08-21 19:03:41,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:03:41,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:03:42,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:03:42,118 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:03:42,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:03:42,160 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:03:42,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42 WrapperNode [2020-08-21 19:03:42,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:03:42,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:03:42,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:03:42,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:03:42,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (1/1) ... [2020-08-21 19:03:42,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (1/1) ... [2020-08-21 19:03:42,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (1/1) ... [2020-08-21 19:03:42,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (1/1) ... [2020-08-21 19:03:42,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (1/1) ... [2020-08-21 19:03:42,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (1/1) ... [2020-08-21 19:03:42,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (1/1) ... [2020-08-21 19:03:42,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:03:42,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:03:42,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:03:42,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:03:42,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (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 19:03:42,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:03:42,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:03:42,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 19:03:42,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 19:03:42,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:03:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:03:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 19:03:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 19:03:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 19:03:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:03:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 19:03:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:03:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:03:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 19:03:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:03:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:03:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:03:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:03:42,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:03:42,668 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:03:42,669 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 19:03:42,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:42 BoogieIcfgContainer [2020-08-21 19:03:42,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:03:42,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:03:42,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:03:42,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:03:42,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:03:41" (1/3) ... [2020-08-21 19:03:42,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724468ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:42, skipping insertion in model container [2020-08-21 19:03:42,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:42" (2/3) ... [2020-08-21 19:03:42,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724468ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:42, skipping insertion in model container [2020-08-21 19:03:42,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:42" (3/3) ... [2020-08-21 19:03:42,690 INFO L109 eAbstractionObserver]: Analyzing ICFG condgf.c [2020-08-21 19:03:42,704 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:03:42,712 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:03:42,730 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:03:42,762 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:03:42,762 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:03:42,763 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:03:42,763 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:03:42,763 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:03:42,763 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:03:42,764 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:03:42,764 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:03:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 19:03:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:03:42,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:42,796 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] [2020-08-21 19:03:42,797 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1314310818, now seen corresponding path program 1 times [2020-08-21 19:03:42,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:42,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490856943] [2020-08-21 19:03:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:43,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:43,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:43,025 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 19:03:43,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490856943] [2020-08-21 19:03:43,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:03:43,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:03:43,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027074723] [2020-08-21 19:03:43,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:03:43,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:43,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:03:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:03:43,049 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 19:03:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:43,192 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2020-08-21 19:03:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:03:43,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 19:03:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:43,203 INFO L225 Difference]: With dead ends: 66 [2020-08-21 19:03:43,203 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 19:03:43,207 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 19:03:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 19:03:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 19:03:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 19:03:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-21 19:03:43,249 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-21 19:03:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:43,250 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-21 19:03:43,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:03:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-21 19:03:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 19:03:43,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:43,252 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] [2020-08-21 19:03:43,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:03:43,252 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash 34447140, now seen corresponding path program 1 times [2020-08-21 19:03:43,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:43,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013667813] [2020-08-21 19:03:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:43,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:43,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:43,401 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 19:03:43,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013667813] [2020-08-21 19:03:43,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:03:43,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:03:43,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781457713] [2020-08-21 19:03:43,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:03:43,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:03:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:03:43,406 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-08-21 19:03:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:43,579 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-08-21 19:03:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:03:43,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-21 19:03:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:43,583 INFO L225 Difference]: With dead ends: 62 [2020-08-21 19:03:43,583 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 19:03:43,584 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 19:03:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 19:03:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-08-21 19:03:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 19:03:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-21 19:03:43,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-08-21 19:03:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:43,600 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-21 19:03:43,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:03:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-21 19:03:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 19:03:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:43,602 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, 1, 1, 1, 1] [2020-08-21 19:03:43,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:03:43,602 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1408881596, now seen corresponding path program 1 times [2020-08-21 19:03:43,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:43,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273572360] [2020-08-21 19:03:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:44,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:44,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:03:44,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273572360] [2020-08-21 19:03:44,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:03:44,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:03:44,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310941041] [2020-08-21 19:03:44,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:03:44,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:03:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:03:44,058 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2020-08-21 19:03:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:44,507 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-08-21 19:03:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:03:44,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-08-21 19:03:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:44,509 INFO L225 Difference]: With dead ends: 59 [2020-08-21 19:03:44,510 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 19:03:44,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-21 19:03:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 19:03:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 19:03:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 19:03:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-08-21 19:03:44,521 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 31 [2020-08-21 19:03:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:44,521 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-08-21 19:03:44,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:03:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-08-21 19:03:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 19:03:44,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:44,523 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, 1, 1, 1, 1] [2020-08-21 19:03:44,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:03:44,524 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash -728823226, now seen corresponding path program 1 times [2020-08-21 19:03:44,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:44,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642979212] [2020-08-21 19:03:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:03:44,552 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:03:44,553 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:03:44,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:03:44,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:03:44 BoogieIcfgContainer [2020-08-21 19:03:44,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:03:44,579 INFO L168 Benchmark]: Toolchain (without parser) took 2724.64 ms. Allocated memory was 149.4 MB in the beginning and 232.3 MB in the end (delta: 82.8 MB). Free memory was 105.0 MB in the beginning and 124.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:44,579 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:03:44,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.05 ms. Allocated memory is still 149.4 MB. Free memory was 104.8 MB in the beginning and 94.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:44,581 INFO L168 Benchmark]: Boogie Preprocessor took 147.85 ms. Allocated memory was 149.4 MB in the beginning and 204.5 MB in the end (delta: 55.1 MB). Free memory was 94.2 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:44,582 INFO L168 Benchmark]: RCFGBuilder took 366.51 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 163.1 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:44,583 INFO L168 Benchmark]: TraceAbstraction took 1897.04 ms. Allocated memory was 204.5 MB in the beginning and 232.3 MB in the end (delta: 27.8 MB). Free memory was 162.4 MB in the beginning and 124.6 MB in the end (delta: 37.8 MB). Peak memory consumption was 65.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:44,587 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.05 ms. Allocated memory is still 149.4 MB. Free memory was 104.8 MB in the beginning and 94.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.85 ms. Allocated memory was 149.4 MB in the beginning and 204.5 MB in the end (delta: 55.1 MB). Free memory was 94.2 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 366.51 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 163.1 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1897.04 ms. Allocated memory was 204.5 MB in the beginning and 232.3 MB in the end (delta: 27.8 MB). Free memory was 162.4 MB in the beginning and 124.6 MB in the end (delta: 37.8 MB). Peak memory consumption was 65.6 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] sum[0] = 0 [L30] i=0 [L30] COND TRUE i