/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-fpi/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:07:14,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:07:14,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:07:14,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:07:14,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:07:14,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:07:14,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:07:14,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:07:14,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:07:14,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:07:14,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:07:14,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:07:14,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:07:14,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:07:14,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:07:14,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:07:14,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:07:14,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:07:14,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:07:14,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:07:14,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:07:14,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:07:14,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:07:14,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:07:14,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:07:14,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:07:14,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:07:14,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:07:14,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:07:14,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:07:14,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:07:14,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:07:14,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:07:14,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:07:14,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:07:14,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:07:14,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:07:14,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:07:14,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:07:14,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:07:14,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:07:14,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:07:14,907 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:07:14,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:07:14,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:07:14,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:07:14,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:07:14,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:07:14,909 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:07:14,909 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:07:14,909 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:07:14,910 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:07:14,910 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:07:14,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:07:14,911 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:07:14,911 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:07:14,911 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:07:14,911 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:07:14,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:07:14,911 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:07:14,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:07:14,912 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:07:14,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:07:14,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:07:14,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:07:14,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:07:14,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:07:14,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:07:14,913 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:07:14,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:07:14,913 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:07:14,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:07:14,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:07:14,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:07:14,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:07:14,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:07:14,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:07:15,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:07:15,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:07:15,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:07:15,193 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:07:15,193 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:07:15,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2of.c [2023-04-01 09:07:16,337 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:07:16,518 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:07:16,518 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2of.c [2023-04-01 09:07:16,523 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58f780dd/1a733667debf4bdaa68674d2a811caf3/FLAGb113486e2 [2023-04-01 09:07:16,536 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f58f780dd/1a733667debf4bdaa68674d2a811caf3 [2023-04-01 09:07:16,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:07:16,539 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:07:16,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:07:16,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:07:16,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:07:16,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1def70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16, skipping insertion in model container [2023-04-01 09:07:16,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:07:16,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:07:16,675 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2of.c[589,602] [2023-04-01 09:07:16,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:07:16,701 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:07:16,709 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2of.c[589,602] [2023-04-01 09:07:16,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:07:16,734 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:07:16,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16 WrapperNode [2023-04-01 09:07:16,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:07:16,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:07:16,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:07:16,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:07:16,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:07:16,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:07:16,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:07:16,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:07:16,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (1/1) ... [2023-04-01 09:07:16,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:07:16,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:16,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:07:16,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:07:16,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:07:16,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:07:16,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:07:16,825 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:07:16,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:07:16,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:07:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:07:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:07:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:07:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:07:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:07:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:07:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:07:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:07:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:07:16,924 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:07:16,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:07:17,139 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:07:17,176 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:07:17,176 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 09:07:17,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:07:17 BoogieIcfgContainer [2023-04-01 09:07:17,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:07:17,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:07:17,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:07:17,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:07:17,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:07:16" (1/3) ... [2023-04-01 09:07:17,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5376e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:07:17, skipping insertion in model container [2023-04-01 09:07:17,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:16" (2/3) ... [2023-04-01 09:07:17,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5376e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:07:17, skipping insertion in model container [2023-04-01 09:07:17,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:07:17" (3/3) ... [2023-04-01 09:07:17,186 INFO L112 eAbstractionObserver]: Analyzing ICFG res2of.c [2023-04-01 09:07:17,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:07:17,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:07:17,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:07:17,256 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@297248aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:07:17,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:07:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:07:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 09:07:17,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:17,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:17,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:17,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1698240331, now seen corresponding path program 1 times [2023-04-01 09:07:17,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:17,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772902201] [2023-04-01 09:07:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:17,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:17,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:17,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772902201] [2023-04-01 09:07:17,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772902201] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:07:17,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:07:17,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:07:17,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787979522] [2023-04-01 09:07:17,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:07:17,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:07:17,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:07:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:07:17,679 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:17,793 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-04-01 09:07:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:07:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-01 09:07:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:17,801 INFO L225 Difference]: With dead ends: 55 [2023-04-01 09:07:17,801 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 09:07:17,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:07:17,806 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:17,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 42 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 09:07:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 09:07:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-04-01 09:07:17,836 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2023-04-01 09:07:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:17,836 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-04-01 09:07:17,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:07:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-04-01 09:07:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:07:17,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:17,838 INFO L195 NwaCegarLoop]: 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] [2023-04-01 09:07:17,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:07:17,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:17,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1845636993, now seen corresponding path program 1 times [2023-04-01 09:07:17,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073452565] [2023-04-01 09:07:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:17,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:07:17,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 09:07:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:07:17,998 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 09:07:17,998 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 09:07:18,000 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 09:07:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:07:18,004 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-04-01 09:07:18,007 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 09:07:18,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 09:07:18 BoogieIcfgContainer [2023-04-01 09:07:18,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 09:07:18,032 INFO L158 Benchmark]: Toolchain (without parser) took 1492.94ms. Allocated memory is still 262.1MB. Free memory was 216.6MB in the beginning and 213.9MB in the end (delta: 2.7MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-04-01 09:07:18,033 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 185.6MB. Free memory is still 132.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 09:07:18,033 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.42ms. Allocated memory is still 262.1MB. Free memory was 216.1MB in the beginning and 205.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 09:07:18,034 INFO L158 Benchmark]: Boogie Preprocessor took 28.95ms. Allocated memory is still 262.1MB. Free memory was 205.5MB in the beginning and 203.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 09:07:18,034 INFO L158 Benchmark]: RCFGBuilder took 413.73ms. Allocated memory is still 262.1MB. Free memory was 203.6MB in the beginning and 185.7MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-04-01 09:07:18,034 INFO L158 Benchmark]: TraceAbstraction took 851.26ms. Allocated memory is still 262.1MB. Free memory was 185.1MB in the beginning and 213.9MB in the end (delta: -28.7MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 09:07:18,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 185.6MB. Free memory is still 132.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.42ms. Allocated memory is still 262.1MB. Free memory was 216.1MB in the beginning and 205.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.95ms. Allocated memory is still 262.1MB. Free memory was 205.5MB in the beginning and 203.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 413.73ms. Allocated memory is still 262.1MB. Free memory was 203.6MB in the beginning and 185.7MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 851.26ms. Allocated memory is still 262.1MB. Free memory was 185.1MB in the beginning and 213.9MB in the end (delta: -28.7MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [N=1, \old(N)=0] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=1, \old(N)=0, \old(cond)=1] [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=1, \old(N)=0] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 0 [L34] i=0 VAL [N=1, \old(N)=0, a={-2:0}, b={-3:0}, c={-1:0}, i=0, sum={5:0}] [L34] COND TRUE i