/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:48:08,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:48:08,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:48:08,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:48:08,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:48:08,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:48:08,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:48:08,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:48:08,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:48:08,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:48:08,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:48:08,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:48:08,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:48:08,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:48:08,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:48:08,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:48:08,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:48:08,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:48:08,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:48:08,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:48:08,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:48:08,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:48:08,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:48:08,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:48:08,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:48:08,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:48:08,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:48:08,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:48:08,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:48:08,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:48:08,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:48:08,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:48:08,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:48:08,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:48:08,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:48:08,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:48:08,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:48:08,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:48:08,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:48:08,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:48:08,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:48:08,660 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 [2020-08-18 18:48:08,702 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:48:08,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:48:08,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:48:08,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:48:08,705 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:48:08,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:48:08,705 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:48:08,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:48:08,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:48:08,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:48:08,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:48:08,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:48:08,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:48:08,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:48:08,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:48:08,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:48:08,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:48:08,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:48:08,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:48:08,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:48:08,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:48:08,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:48:08,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:48:08,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:48:08,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:48:08,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:48:08,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:48:08,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:48:08,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:48:08,711 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=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:48:09,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:48:09,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:48:09,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:48:09,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:48:09,021 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:48:09,022 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1f.c [2020-08-18 18:48:09,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4020f125/88c8832db3d24b8b9f9081256875f1e8/FLAG18ce90988 [2020-08-18 18:48:09,563 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:48:09,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs1f.c [2020-08-18 18:48:09,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4020f125/88c8832db3d24b8b9f9081256875f1e8/FLAG18ce90988 [2020-08-18 18:48:09,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4020f125/88c8832db3d24b8b9f9081256875f1e8 [2020-08-18 18:48:09,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:48:09,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:48:09,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:48:09,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:48:09,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:48:09,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:48:09" (1/1) ... [2020-08-18 18:48:09,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264e4517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:09, skipping insertion in model container [2020-08-18 18:48:09,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:48:09" (1/1) ... [2020-08-18 18:48:09,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:48:09,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:48:10,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:48:10,237 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:48:10,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:48:10,355 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:48:10,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10 WrapperNode [2020-08-18 18:48:10,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:48:10,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:48:10,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:48:10,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:48:10,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (1/1) ... [2020-08-18 18:48:10,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (1/1) ... [2020-08-18 18:48:10,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (1/1) ... [2020-08-18 18:48:10,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (1/1) ... [2020-08-18 18:48:10,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (1/1) ... [2020-08-18 18:48:10,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (1/1) ... [2020-08-18 18:48:10,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (1/1) ... [2020-08-18 18:48:10,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:48:10,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:48:10,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:48:10,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:48:10,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (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 [2020-08-18 18:48:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:48:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:48:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:48:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:48:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 18:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 18:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 18:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 18:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 18:48:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 18:48:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:48:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:48:10,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:48:10,782 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 18:48:10,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:48:10 BoogieIcfgContainer [2020-08-18 18:48:10,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:48:10,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:48:10,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:48:10,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:48:10,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:48:09" (1/3) ... [2020-08-18 18:48:10,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac68c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:48:10, skipping insertion in model container [2020-08-18 18:48:10,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:10" (2/3) ... [2020-08-18 18:48:10,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac68c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:48:10, skipping insertion in model container [2020-08-18 18:48:10,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:48:10" (3/3) ... [2020-08-18 18:48:10,795 INFO L109 eAbstractionObserver]: Analyzing ICFG brs1f.c [2020-08-18 18:48:10,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:48:10,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:48:10,835 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:48:10,855 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:48:10,855 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:48:10,855 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:48:10,855 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:48:10,855 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:48:10,855 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:48:10,855 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:48:10,855 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:48:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 18:48:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:48:10,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:10,882 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] [2020-08-18 18:48:10,882 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:10,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-18 18:48:10,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:10,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986623943] [2020-08-18 18:48:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:11,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:11,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 18:48:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:48:11,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986623943] [2020-08-18 18:48:11,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:48:11,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:48:11,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908418048] [2020-08-18 18:48:11,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:48:11,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:48:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:48:11,147 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-18 18:48:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:11,298 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 18:48:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:48:11,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:48:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:11,311 INFO L225 Difference]: With dead ends: 56 [2020-08-18 18:48:11,312 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:48:11,319 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 [2020-08-18 18:48:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:48:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 18:48:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:48:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-08-18 18:48:11,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-08-18 18:48:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:11,362 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-08-18 18:48:11,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:48:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-08-18 18:48:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:48:11,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:11,364 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] [2020-08-18 18:48:11,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:48:11,365 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-18 18:48:11,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:11,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260179075] [2020-08-18 18:48:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:11,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 18:48:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:48:11,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260179075] [2020-08-18 18:48:11,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:48:11,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:48:11,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616097083] [2020-08-18 18:48:11,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:48:11,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:11,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:48:11,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:48:11,496 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-08-18 18:48:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:11,617 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-08-18 18:48:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:48:11,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 18:48:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:11,619 INFO L225 Difference]: With dead ends: 42 [2020-08-18 18:48:11,619 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 18:48:11,620 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 [2020-08-18 18:48:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 18:48:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-08-18 18:48:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 18:48:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-08-18 18:48:11,629 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-08-18 18:48:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:11,630 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-08-18 18:48:11,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:48:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-08-18 18:48:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:48:11,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:11,634 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] [2020-08-18 18:48:11,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:48:11,634 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-18 18:48:11,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:11,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064923155] [2020-08-18 18:48:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:48:11,710 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:48:11,710 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:48:11,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:48:11,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:48:11 BoogieIcfgContainer [2020-08-18 18:48:11,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:48:11,734 INFO L168 Benchmark]: Toolchain (without parser) took 1774.91 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 104.2 MB in the beginning and 110.7 MB in the end (delta: -6.5 MB). Peak memory consumption was 56.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:11,735 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:48:11,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.56 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 104.0 MB in the beginning and 183.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:11,737 INFO L168 Benchmark]: Boogie Preprocessor took 45.19 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:11,738 INFO L168 Benchmark]: RCFGBuilder took 383.44 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 163.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:11,739 INFO L168 Benchmark]: TraceAbstraction took 943.42 ms. Allocated memory is still 204.5 MB. Free memory was 163.3 MB in the beginning and 110.7 MB in the end (delta: 52.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:11,743 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 397.56 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 104.0 MB in the beginning and 183.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.19 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.44 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 163.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 943.42 ms. Allocated memory is still 204.5 MB. Free memory was 163.3 MB in the beginning and 110.7 MB in the end (delta: 52.6 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i