/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/s4liff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:08:19,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:08:19,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:08:19,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:08:19,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:08:19,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:08:19,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:08:19,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:08:19,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:08:19,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:08:19,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:08:19,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:08:19,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:08:19,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:08:19,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:08:19,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:08:19,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:08:19,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:08:19,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:08:19,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:08:19,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:08:19,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:08:19,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:08:19,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:08:19,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:08:19,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:08:19,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:08:19,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:08:19,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:08:19,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:08:19,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:08:19,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:08:19,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:08:19,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:08:19,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:08:19,860 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:08:19,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:08:19,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:08:19,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:08:19,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:08:19,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:08:19,863 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 09:08:19,886 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:08:19,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:08:19,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:08:19,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:08:19,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:08:19,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:08:19,887 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:08:19,887 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:08:19,887 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:08:19,888 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:08:19,888 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:08:19,888 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:08:19,888 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:08:19,888 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:08:19,888 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:08:19,889 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:08:19,889 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:08:19,889 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:08:19,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:08:19,889 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:08:19,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:08:19,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:08:19,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:08:19,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:08:19,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:08:19,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:08:19,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:08:19,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:08:20,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:08:20,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:08:20,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:08:20,103 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:08:20,104 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:08:20,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4liff.c [2023-04-01 09:08:21,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:08:21,278 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:08:21,278 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4liff.c [2023-04-01 09:08:21,287 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c51325b/100825f80d3d42418197cb253b2122ac/FLAG5cf9ec99a [2023-04-01 09:08:21,315 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2c51325b/100825f80d3d42418197cb253b2122ac [2023-04-01 09:08:21,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:08:21,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:08:21,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:08:21,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:08:21,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:08:21,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50bf58e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21, skipping insertion in model container [2023-04-01 09:08:21,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:08:21,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:08:21,460 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/s4liff.c[589,602] [2023-04-01 09:08:21,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:08:21,490 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:08:21,499 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/s4liff.c[589,602] [2023-04-01 09:08:21,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:08:21,516 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:08:21,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21 WrapperNode [2023-04-01 09:08:21,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:08:21,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:08:21,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:08:21,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:08:21,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:08:21,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:08:21,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:08:21,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:08:21,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (1/1) ... [2023-04-01 09:08:21,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:08:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:08:21,593 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 09:08:21,606 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 09:08:21,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:08:21,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:08:21,634 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:08:21,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:08:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:08:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:08:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:08:21,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:08:21,718 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:08:21,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:08:21,954 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:08:22,011 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:08:22,011 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:08:22,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:08:22 BoogieIcfgContainer [2023-04-01 09:08:22,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:08:22,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:08:22,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:08:22,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:08:22,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:08:21" (1/3) ... [2023-04-01 09:08:22,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7ffd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:08:22, skipping insertion in model container [2023-04-01 09:08:22,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:08:21" (2/3) ... [2023-04-01 09:08:22,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7ffd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:08:22, skipping insertion in model container [2023-04-01 09:08:22,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:08:22" (3/3) ... [2023-04-01 09:08:22,026 INFO L112 eAbstractionObserver]: Analyzing ICFG s4liff.c [2023-04-01 09:08:22,041 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:08:22,041 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:08:22,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:08:22,099 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;@479aefc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:08:22,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:08:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 09:08:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:08:22,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:22,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:08:22,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:22,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:22,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1638581746, now seen corresponding path program 1 times [2023-04-01 09:08:22,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:22,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254054097] [2023-04-01 09:08:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:22,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:08:22,385 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 09:08:22,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:08:22,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254054097] [2023-04-01 09:08:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254054097] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:08:22,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:08:22,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:08:22,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510375816] [2023-04-01 09:08:22,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:08:22,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:08:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:08:22,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:08:22,427 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 09:08:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:08:22,483 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-04-01 09:08:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:08:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 17 [2023-04-01 09:08:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:08:22,498 INFO L225 Difference]: With dead ends: 46 [2023-04-01 09:08:22,498 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 09:08:22,500 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 09:08:22,502 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:08:22,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:08:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 09:08:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 09:08:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 09:08:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 09:08:22,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2023-04-01 09:08:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:08:22,544 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 09:08:22,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 09:08:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 09:08:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 09:08:22,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:22,552 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 09:08:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:08:22,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:22,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1163256344, now seen corresponding path program 1 times [2023-04-01 09:08:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:22,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760492185] [2023-04-01 09:08:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:08:22,628 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 09:08:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:08:22,676 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 09:08:22,676 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 09:08:22,677 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 09:08:22,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:08:22,681 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-04-01 09:08:22,684 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 09:08:22,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 09:08:22 BoogieIcfgContainer [2023-04-01 09:08:22,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 09:08:22,715 INFO L158 Benchmark]: Toolchain (without parser) took 1397.34ms. Allocated memory is still 263.2MB. Free memory was 227.8MB in the beginning and 228.6MB in the end (delta: -811.3kB). Peak memory consumption was 80.0kB. Max. memory is 8.0GB. [2023-04-01 09:08:22,715 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory was 136.2MB in the beginning and 136.0MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 09:08:22,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.60ms. Allocated memory is still 263.2MB. Free memory was 227.7MB in the beginning and 216.8MB in the end (delta: 10.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 09:08:22,716 INFO L158 Benchmark]: Boogie Preprocessor took 38.59ms. Allocated memory is still 263.2MB. Free memory was 216.8MB in the beginning and 215.1MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 09:08:22,716 INFO L158 Benchmark]: RCFGBuilder took 456.54ms. Allocated memory is still 263.2MB. Free memory was 215.1MB in the beginning and 200.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-01 09:08:22,717 INFO L158 Benchmark]: TraceAbstraction took 696.96ms. Allocated memory is still 263.2MB. Free memory was 199.7MB in the beginning and 228.6MB in the end (delta: -28.9MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 09:08:22,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory was 136.2MB in the beginning and 136.0MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.60ms. Allocated memory is still 263.2MB. Free memory was 227.7MB in the beginning and 216.8MB in the end (delta: 10.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.59ms. Allocated memory is still 263.2MB. Free memory was 216.8MB in the beginning and 215.1MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 456.54ms. Allocated memory is still 263.2MB. Free memory was 215.1MB in the beginning and 200.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 696.96ms. Allocated memory is still 263.2MB. Free memory was 199.7MB in the beginning and 228.6MB in the end (delta: -28.9MB). 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); [L31] sum[0] = N [L32] i=0 VAL [N=1, \old(N)=0, a={-1:0}, i=0, sum={7:0}] [L32] COND TRUE i