/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=SHALLOWEST --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 19:52:02,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:52:02,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:52:02,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:52:02,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:52:02,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:52:02,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:52:02,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:52:02,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:52:02,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:52:02,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:52:02,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:52:02,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:52:02,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:52:02,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:52:02,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:52:02,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:52:02,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:52:02,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:52:02,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:52:02,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:52:02,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:52:02,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:52:02,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:52:02,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:52:02,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:52:02,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:52:02,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:52:02,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:52:02,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:52:02,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:52:02,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:52:02,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:52:02,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:52:02,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:52:02,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:52:02,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:52:02,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:52:02,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:52:02,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:52:02,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:52:02,575 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 19:52:02,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:52:02,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:52:02,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:52:02,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:52:02,603 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:52:02,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:52:02,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:52:02,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:52:02,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:52:02,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:52:02,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:52:02,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:52:02,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:52:02,608 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:52:02,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:52:02,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:52:02,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:52:02,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:52:02,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:52:02,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:52:02,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:52:02,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:52:02,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:52:02,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:52:02,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:52:02,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:52:02,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:52:02,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:52:02,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:52:02,612 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=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:52:02,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:52:02,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:52:02,940 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:52:02,941 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:52:02,942 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:52:02,943 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c [2020-08-21 19:52:03,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/815c7dfa3/4258f0bd6fa24c6088f87316ade73b80/FLAG388d6d7b7 [2020-08-21 19:52:03,478 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:52:03,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/condaf.c [2020-08-21 19:52:03,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/815c7dfa3/4258f0bd6fa24c6088f87316ade73b80/FLAG388d6d7b7 [2020-08-21 19:52:03,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/815c7dfa3/4258f0bd6fa24c6088f87316ade73b80 [2020-08-21 19:52:03,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:52:03,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:52:03,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:52:03,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:52:03,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:52:03,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:52:03" (1/1) ... [2020-08-21 19:52:03,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176fd554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:03, skipping insertion in model container [2020-08-21 19:52:03,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:52:03" (1/1) ... [2020-08-21 19:52:03,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:52:03,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:52:04,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:52:04,126 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:52:04,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:52:04,264 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:52:04,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04 WrapperNode [2020-08-21 19:52:04,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:52:04,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:52:04,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:52:04,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:52:04,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (1/1) ... [2020-08-21 19:52:04,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (1/1) ... [2020-08-21 19:52:04,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (1/1) ... [2020-08-21 19:52:04,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (1/1) ... [2020-08-21 19:52:04,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (1/1) ... [2020-08-21 19:52:04,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (1/1) ... [2020-08-21 19:52:04,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (1/1) ... [2020-08-21 19:52:04,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:52:04,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:52:04,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:52:04,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:52:04,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (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 19:52:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:52:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:52:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 19:52:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 19:52:04,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:52:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:52:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 19:52:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 19:52:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 19:52:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:52:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 19:52:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:52:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:52:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 19:52:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:52:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:52:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:52:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:52:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:52:04,679 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:52:04,680 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-21 19:52:04,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:52:04 BoogieIcfgContainer [2020-08-21 19:52:04,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:52:04,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:52:04,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:52:04,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:52:04,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:52:03" (1/3) ... [2020-08-21 19:52:04,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a8939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:52:04, skipping insertion in model container [2020-08-21 19:52:04,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:52:04" (2/3) ... [2020-08-21 19:52:04,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a8939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:52:04, skipping insertion in model container [2020-08-21 19:52:04,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:52:04" (3/3) ... [2020-08-21 19:52:04,695 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2020-08-21 19:52:04,710 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:52:04,726 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:52:04,766 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:52:04,818 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:52:04,818 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:52:04,818 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:52:04,818 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:52:04,819 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:52:04,819 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:52:04,819 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:52:04,819 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:52:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-21 19:52:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:52:04,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:04,847 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 19:52:04,848 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-08-21 19:52:04,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:04,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280074099] [2020-08-21 19:52:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:52:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,074 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 19:52:05,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280074099] [2020-08-21 19:52:05,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:05,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:52:05,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199256790] [2020-08-21 19:52:05,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:52:05,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:05,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:52:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:52:05,098 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-21 19:52:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:05,234 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-08-21 19:52:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:52:05,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 19:52:05,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:05,247 INFO L225 Difference]: With dead ends: 60 [2020-08-21 19:52:05,247 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 19:52:05,252 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 19:52:05,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 19:52:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 19:52:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 19:52:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-21 19:52:05,297 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-08-21 19:52:05,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:05,298 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-21 19:52:05,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:52:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-21 19:52:05,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 19:52:05,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:05,299 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 19:52:05,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:52:05,300 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-08-21 19:52:05,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:05,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895607446] [2020-08-21 19:52:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:52:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,440 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 19:52:05,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895607446] [2020-08-21 19:52:05,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:05,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:52:05,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240021671] [2020-08-21 19:52:05,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:52:05,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:05,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:52:05,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:52:05,445 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-08-21 19:52:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:05,578 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-08-21 19:52:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:52:05,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-21 19:52:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:05,580 INFO L225 Difference]: With dead ends: 48 [2020-08-21 19:52:05,580 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 19:52:05,581 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 19:52:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 19:52:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-21 19:52:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-21 19:52:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-21 19:52:05,590 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-08-21 19:52:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:05,591 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-21 19:52:05,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:52:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-21 19:52:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 19:52:05,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:05,593 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 19:52:05,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:52:05,593 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-08-21 19:52:05,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:05,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571501301] [2020-08-21 19:52:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:52:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:06,002 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 19:52:06,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571501301] [2020-08-21 19:52:06,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:06,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 19:52:06,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214326158] [2020-08-21 19:52:06,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:52:06,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:52:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:52:06,006 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 9 states. [2020-08-21 19:52:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:06,217 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 19:52:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:52:06,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-08-21 19:52:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:06,219 INFO L225 Difference]: With dead ends: 50 [2020-08-21 19:52:06,219 INFO L226 Difference]: Without dead ends: 37 [2020-08-21 19:52:06,221 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 19:52:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-21 19:52:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-08-21 19:52:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 19:52:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-21 19:52:06,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 30 [2020-08-21 19:52:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:06,234 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-21 19:52:06,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:52:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-21 19:52:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 19:52:06,236 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:06,237 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 19:52:06,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:52:06,237 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:06,238 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-08-21 19:52:06,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:06,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228018613] [2020-08-21 19:52:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:52:06,305 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:52:06,306 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:52:06,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:52:06,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:52:06 BoogieIcfgContainer [2020-08-21 19:52:06,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:52:06,332 INFO L168 Benchmark]: Toolchain (without parser) took 2453.61 ms. Allocated memory was 145.8 MB in the beginning and 233.3 MB in the end (delta: 87.6 MB). Free memory was 101.5 MB in the beginning and 167.5 MB in the end (delta: -66.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:06,333 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 19:52:06,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.75 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 101.1 MB in the beginning and 181.1 MB in the end (delta: -80.0 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:06,335 INFO L168 Benchmark]: Boogie Preprocessor took 71.69 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 178.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:06,336 INFO L168 Benchmark]: RCFGBuilder took 348.60 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 160.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:06,337 INFO L168 Benchmark]: TraceAbstraction took 1641.04 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 160.6 MB in the beginning and 167.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:06,341 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 384.75 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 101.1 MB in the beginning and 181.1 MB in the end (delta: -80.0 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.69 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 178.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.60 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 160.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1641.04 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 160.6 MB in the beginning and 167.5 MB in the end (delta: -7.0 MB). Peak memory consumption was 24.0 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