/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=DEEPEST --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/condaf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:40:27,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:40:27,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:40:27,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:40:27,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:40:28,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:40:28,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:40:28,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:40:28,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:40:28,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:40:28,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:40:28,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:40:28,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:40:28,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:40:28,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:40:28,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:40:28,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:40:28,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:40:28,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:40:28,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:40:28,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:40:28,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:40:28,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:40:28,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:40:28,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:40:28,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:40:28,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:40:28,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:40:28,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:40:28,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:40:28,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:40:28,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:40:28,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:40:28,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:40:28,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:40:28,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:40:28,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:40:28,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:40:28,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:40:28,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:40:28,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:40:28,067 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 20:40:28,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:40:28,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:40:28,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:40:28,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:40:28,111 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:40:28,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:40:28,111 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:40:28,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:40:28,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:40:28,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:40:28,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:40:28,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:40:28,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:40:28,114 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:40:28,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:40:28,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:40:28,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:40:28,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:40:28,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:40:28,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:40:28,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:40:28,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:40:28,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:40:28,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:40:28,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:40:28,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:40:28,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:40:28,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:40:28,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:40:28,117 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=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:40:28,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:40:28,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:40:28,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:40:28,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:40:28,483 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:40:28,483 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c [2020-08-21 20:40:28,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1ae6539c/455f95fc18644adaaaf66c6f1021a15f/FLAG31495fd0c [2020-08-21 20:40:29,071 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:40:29,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condaf.c [2020-08-21 20:40:29,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1ae6539c/455f95fc18644adaaaf66c6f1021a15f/FLAG31495fd0c [2020-08-21 20:40:29,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1ae6539c/455f95fc18644adaaaf66c6f1021a15f [2020-08-21 20:40:29,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:40:29,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:40:29,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:40:29,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:40:29,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:40:29,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29, skipping insertion in model container [2020-08-21 20:40:29,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:40:29,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:40:29,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:40:29,689 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:40:29,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:40:29,807 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:40:29,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29 WrapperNode [2020-08-21 20:40:29,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:40:29,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:40:29,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:40:29,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:40:29,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (1/1) ... [2020-08-21 20:40:29,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:40:29,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:40:29,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:40:29,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:40:29,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (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 20:40:29,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:40:29,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:40:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 20:40:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 20:40:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:40:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:40:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 20:40:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 20:40:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 20:40:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:40:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 20:40:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:40:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 20:40:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 20:40:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 20:40:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 20:40:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 20:40:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:40:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:40:30,240 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:40:30,241 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 20:40:30,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:40:30 BoogieIcfgContainer [2020-08-21 20:40:30,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:40:30,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:40:30,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:40:30,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:40:30,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:40:29" (1/3) ... [2020-08-21 20:40:30,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227863a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:40:30, skipping insertion in model container [2020-08-21 20:40:30,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:40:29" (2/3) ... [2020-08-21 20:40:30,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@227863a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:40:30, skipping insertion in model container [2020-08-21 20:40:30,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:40:30" (3/3) ... [2020-08-21 20:40:30,269 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2020-08-21 20:40:30,280 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:40:30,287 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:40:30,300 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:40:30,322 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:40:30,322 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:40:30,322 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:40:30,322 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:40:30,322 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:40:30,323 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:40:30,323 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:40:30,323 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:40:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 20:40:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:40:30,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:30,351 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] [2020-08-21 20:40:30,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-08-21 20:40:30,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:30,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409848687] [2020-08-21 20:40:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 20:40:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,561 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 20:40:30,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409848687] [2020-08-21 20:40:30,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:40:30,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 20:40:30,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468257338] [2020-08-21 20:40:30,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 20:40:30,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:30,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 20:40:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 20:40:30,589 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-21 20:40:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:30,716 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-08-21 20:40:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 20:40:30,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 20:40:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:30,728 INFO L225 Difference]: With dead ends: 60 [2020-08-21 20:40:30,729 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 20:40:30,733 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 20:40:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 20:40:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 20:40:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 20:40:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-21 20:40:30,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-08-21 20:40:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:30,776 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-21 20:40:30,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 20:40:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-21 20:40:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:40:30,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:30,778 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] [2020-08-21 20:40:30,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:40:30,778 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-08-21 20:40:30,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:30,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239053952] [2020-08-21 20:40:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 20:40:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:30,927 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 20:40:30,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239053952] [2020-08-21 20:40:30,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:40:30,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 20:40:30,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013667813] [2020-08-21 20:40:30,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 20:40:30,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:30,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 20:40:30,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 20:40:30,931 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-08-21 20:40:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:31,076 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-08-21 20:40:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 20:40:31,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-21 20:40:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:31,078 INFO L225 Difference]: With dead ends: 48 [2020-08-21 20:40:31,078 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 20:40:31,079 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 20:40:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 20:40:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-21 20:40:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 20:40:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-21 20:40:31,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-08-21 20:40:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:31,089 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-21 20:40:31,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 20:40:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-21 20:40:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 20:40:31,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:31,091 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] [2020-08-21 20:40:31,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:40:31,091 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-08-21 20:40:31,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:31,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340266526] [2020-08-21 20:40:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:40:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 20:40:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:40:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 20:40:31,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340266526] [2020-08-21 20:40:31,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:40:31,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 20:40:31,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921348512] [2020-08-21 20:40:31,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:40:31,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:40:31,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:40:31,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:40:31,508 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 9 states. [2020-08-21 20:40:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:40:31,709 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 20:40:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:40:31,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-21 20:40:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:40:31,711 INFO L225 Difference]: With dead ends: 50 [2020-08-21 20:40:31,712 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 20:40:31,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:40:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 20:40:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-08-21 20:40:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 20:40:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-21 20:40:31,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 30 [2020-08-21 20:40:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:40:31,721 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-21 20:40:31,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:40:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-21 20:40:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 20:40:31,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:40:31,723 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] [2020-08-21 20:40:31,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:40:31,723 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:40:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:40:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-08-21 20:40:31,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:40:31,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415658627] [2020-08-21 20:40:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:40:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:40:31,758 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:40:31,759 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:40:31,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:40:31,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:40:31 BoogieIcfgContainer [2020-08-21 20:40:31,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:40:31,785 INFO L168 Benchmark]: Toolchain (without parser) took 2350.69 ms. Allocated memory was 139.5 MB in the beginning and 234.4 MB in the end (delta: 94.9 MB). Free memory was 101.3 MB in the beginning and 166.5 MB in the end (delta: -65.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:40:31,786 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 20:40:31,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.65 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 101.1 MB in the beginning and 179.8 MB in the end (delta: -78.7 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-21 20:40:31,788 INFO L168 Benchmark]: Boogie Preprocessor took 37.87 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 177.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:40:31,788 INFO L168 Benchmark]: RCFGBuilder took 399.08 ms. Allocated memory is still 200.8 MB. Free memory was 176.9 MB in the beginning and 159.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:40:31,789 INFO L168 Benchmark]: TraceAbstraction took 1527.43 ms. Allocated memory was 200.8 MB in the beginning and 234.4 MB in the end (delta: 33.6 MB). Free memory was 158.9 MB in the beginning and 166.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-08-21 20:40:31,793 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 370.65 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 101.1 MB in the beginning and 179.8 MB in the end (delta: -78.7 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.87 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 177.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.08 ms. Allocated memory is still 200.8 MB. Free memory was 176.9 MB in the beginning and 159.5 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1527.43 ms. Allocated memory was 200.8 MB in the beginning and 234.4 MB in the end (delta: 33.6 MB). Free memory was 158.9 MB in the beginning and 166.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 25.9 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] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 0 [L30] i=0 [L30] COND TRUE i