/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=LOWLEXORDER --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/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:15:16,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:15:16,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:15:16,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:15:16,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:15:16,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:15:16,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:15:16,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:15:16,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:15:16,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:15:16,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:15:16,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:15:16,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:15:16,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:15:16,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:15:16,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:15:16,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:15:16,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:15:16,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:15:16,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:15:16,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:15:16,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:15:16,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:15:16,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:15:16,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:15:16,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:15:16,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:15:16,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:15:16,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:15:16,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:15:16,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:15:16,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:15:16,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:15:16,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:15:16,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:15:16,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:15:16,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:15:16,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:15:16,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:15:16,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:15:16,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:15:16,552 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 18:15:16,595 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:15:16,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:15:16,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:15:16,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:15:16,598 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:15:16,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:15:16,599 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:15:16,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:15:16,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:15:16,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:15:16,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:15:16,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:15:16,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:15:16,602 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:15:16,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:15:16,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:15:16,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:15:16,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:15:16,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:15:16,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:15:16,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:15:16,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:15:16,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:15:16,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:15:16,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:15:16,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:15:16,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:15:16,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:15:16,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:15:16,605 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:15:16,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:15:16,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:15:16,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:15:16,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:15:16,959 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:15:16,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-21 18:15:17,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85bd89517/b020cf84515b4802acc5ee50540e1d9b/FLAG6d8d41910 [2020-08-21 18:15:17,538 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:15:17,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-21 18:15:17,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85bd89517/b020cf84515b4802acc5ee50540e1d9b/FLAG6d8d41910 [2020-08-21 18:15:17,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85bd89517/b020cf84515b4802acc5ee50540e1d9b [2020-08-21 18:15:17,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:15:17,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:15:17,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:17,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:15:17,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:15:17,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:17" (1/1) ... [2020-08-21 18:15:17,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1987833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:17, skipping insertion in model container [2020-08-21 18:15:17,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:15:17" (1/1) ... [2020-08-21 18:15:17,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:15:17,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:15:18,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:18,205 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:15:18,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:15:18,242 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:15:18,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18 WrapperNode [2020-08-21 18:15:18,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:15:18,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:15:18,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:15:18,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:15:18,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (1/1) ... [2020-08-21 18:15:18,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:15:18,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:15:18,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:15:18,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:15:18,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (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 18:15:18,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:15:18,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:15:18,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 18:15:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:15:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:15:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:15:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:15:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 18:15:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:15:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:15:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:15:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:15:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:15:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:15:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:15:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:15:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:15:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:15:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:15:18,714 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:15:18,714 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 18:15:18,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:18 BoogieIcfgContainer [2020-08-21 18:15:18,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:15:18,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:15:18,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:15:18,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:15:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:15:17" (1/3) ... [2020-08-21 18:15:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8d406d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:18, skipping insertion in model container [2020-08-21 18:15:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:15:18" (2/3) ... [2020-08-21 18:15:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8d406d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:15:18, skipping insertion in model container [2020-08-21 18:15:18,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:15:18" (3/3) ... [2020-08-21 18:15:18,725 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-08-21 18:15:18,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:15:18,743 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:15:18,757 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:15:18,779 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:15:18,779 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:15:18,779 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:15:18,779 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:15:18,780 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:15:18,780 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:15:18,780 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:15:18,780 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:15:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 18:15:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:15:18,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:18,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:18,804 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-21 18:15:18,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:18,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611458877] [2020-08-21 18:15:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:18,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:15:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,014 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 18:15:19,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611458877] [2020-08-21 18:15:19,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:19,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:15:19,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969996895] [2020-08-21 18:15:19,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:15:19,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:15:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:15:19,044 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-21 18:15:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:19,158 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-21 18:15:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:15:19,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:15:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:19,169 INFO L225 Difference]: With dead ends: 56 [2020-08-21 18:15:19,169 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 18:15:19,173 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 18:15:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 18:15:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 18:15:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 18:15:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 18:15:19,210 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-21 18:15:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:19,211 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 18:15:19,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:15:19,211 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 18:15:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:15:19,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:19,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:19,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:15:19,213 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-21 18:15:19,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:19,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664839724] [2020-08-21 18:15:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:15:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 18:15:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:15:19,352 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 18:15:19,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664839724] [2020-08-21 18:15:19,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:15:19,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:15:19,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092006778] [2020-08-21 18:15:19,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:15:19,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:15:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:15:19,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:15:19,361 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-21 18:15:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:15:19,495 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 18:15:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:15:19,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 18:15:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:15:19,497 INFO L225 Difference]: With dead ends: 45 [2020-08-21 18:15:19,498 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 18:15:19,499 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 18:15:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 18:15:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 18:15:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 18:15:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-21 18:15:19,508 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-21 18:15:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:15:19,508 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-21 18:15:19,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:15:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-21 18:15:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:15:19,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:15:19,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:15:19,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:15:19,510 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:15:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:15:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-21 18:15:19,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:15:19,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052924144] [2020-08-21 18:15:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:15:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:15:19,552 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:15:19,552 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:15:19,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:15:19,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:15:19 BoogieIcfgContainer [2020-08-21 18:15:19,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:15:19,576 INFO L168 Benchmark]: Toolchain (without parser) took 1616.07 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 103.2 MB in the beginning and 108.9 MB in the end (delta: -5.7 MB). Peak memory consumption was 49.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:19,578 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-21 18:15:19,579 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.81 ms. Allocated memory is still 147.3 MB. Free memory was 102.8 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:19,580 INFO L168 Benchmark]: Boogie Preprocessor took 126.31 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.4 MB in the beginning and 180.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:19,581 INFO L168 Benchmark]: RCFGBuilder took 347.64 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 162.8 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:19,582 INFO L168 Benchmark]: TraceAbstraction took 855.21 ms. Allocated memory is still 202.9 MB. Free memory was 162.8 MB in the beginning and 108.9 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:15:19,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.81 ms. Allocated memory is still 147.3 MB. Free memory was 102.8 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.31 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.4 MB in the beginning and 180.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.64 ms. Allocated memory is still 202.9 MB. Free memory was 180.0 MB in the beginning and 162.8 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 855.21 ms. Allocated memory is still 202.9 MB. Free memory was 162.8 MB in the beginning and 108.9 MB in the end (delta: 53.9 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i