/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 IntervalDomain -i ../sv-benchmarks/c/array-fpi/eqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:59:42,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:59:42,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:59:42,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:59:42,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:59:42,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:59:42,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:59:42,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:59:42,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:59:42,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:59:42,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:59:42,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:59:42,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:59:42,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:59:42,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:59:42,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:59:42,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:59:42,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:59:42,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:59:42,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:59:42,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:59:42,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:59:42,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:59:42,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:59:42,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:59:42,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:59:42,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:59:42,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:59:42,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:59:42,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:59:42,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:59:42,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:59:42,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:59:42,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:59:42,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:59:42,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:59:42,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:59:42,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:59:42,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:59:42,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:59:42,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:59:42,908 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 [2023-03-31 20:59:42,929 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:59:42,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:59:42,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:59:42,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:59:42,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:59:42,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:59:42,930 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:59:42,930 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:59:42,930 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:59:42,930 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:59:42,930 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:59:42,931 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:59:42,931 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:59:42,931 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:59:42,931 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:59:42,931 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:59:42,931 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:59:42,931 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:59:42,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:59:42,932 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:59:42,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:59:42,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:59:42,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:59:42,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:59:42,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:59:43,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:59:43,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:59:43,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:59:43,126 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:59:43,127 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:59:43,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn4f.c [2023-03-31 20:59:44,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:59:44,305 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:59:44,305 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn4f.c [2023-03-31 20:59:44,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9acbecc6/bd913063118d4ba3961f3f138d0120df/FLAG87a9468c5 [2023-03-31 20:59:44,318 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9acbecc6/bd913063118d4ba3961f3f138d0120df [2023-03-31 20:59:44,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:59:44,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:59:44,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:59:44,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:59:44,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:59:44,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791f0e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44, skipping insertion in model container [2023-03-31 20:59:44,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:59:44,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:59:44,416 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/eqn4f.c[588,601] [2023-03-31 20:59:44,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:59:44,443 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:59:44,452 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/eqn4f.c[588,601] [2023-03-31 20:59:44,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:59:44,465 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:59:44,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44 WrapperNode [2023-03-31 20:59:44,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:59:44,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:59:44,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:59:44,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:59:44,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,499 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:59:44,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:59:44,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:59:44,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:59:44,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (1/1) ... [2023-03-31 20:59:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:59:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:59:44,559 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) [2023-03-31 20:59:44,564 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 [2023-03-31 20:59:44,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:59:44,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:59:44,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:59:44,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:59:44,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:59:44,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:59:44,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 20:59:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:59:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:59:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:59:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:59:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:59:44,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:59:44,652 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:59:44,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:59:44,832 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:59:44,877 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:59:44,877 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 20:59:44,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:59:44 BoogieIcfgContainer [2023-03-31 20:59:44,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:59:44,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:59:44,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:59:44,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:59:44,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:59:44" (1/3) ... [2023-03-31 20:59:44,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff1e505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:59:44, skipping insertion in model container [2023-03-31 20:59:44,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:59:44" (2/3) ... [2023-03-31 20:59:44,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff1e505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:59:44, skipping insertion in model container [2023-03-31 20:59:44,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:59:44" (3/3) ... [2023-03-31 20:59:44,884 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn4f.c [2023-03-31 20:59:44,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:59:44,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:59:44,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:59:44,932 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;@68cca093, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:59:44,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:59:44,935 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) [2023-03-31 20:59:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:59:44,941 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:59:44,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:59:44,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:59:44,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:59:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash -180370941, now seen corresponding path program 1 times [2023-03-31 20:59:44,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:59:44,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623826545] [2023-03-31 20:59:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:59:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:59:45,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:59:45,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214413740] [2023-03-31 20:59:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:59:45,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:59:45,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:59:45,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:59:45,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:59:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 20:59:45,215 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 20:59:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 20:59:45,262 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 20:59:45,264 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 20:59:45,267 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 20:59:45,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 20:59:45,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 20:59:45,479 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-03-31 20:59:45,482 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 20:59:45,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 08:59:45 BoogieIcfgContainer [2023-03-31 20:59:45,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 20:59:45,495 INFO L158 Benchmark]: Toolchain (without parser) took 1175.16ms. Allocated memory is still 182.5MB. Free memory was 138.5MB in the beginning and 89.7MB in the end (delta: 48.8MB). Peak memory consumption was 49.3MB. Max. memory is 8.0GB. [2023-03-31 20:59:45,496 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 182.5MB. Free memory is still 136.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 20:59:45,496 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.70ms. Allocated memory is still 182.5MB. Free memory was 138.5MB in the beginning and 128.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 20:59:45,496 INFO L158 Benchmark]: Boogie Preprocessor took 35.25ms. Allocated memory is still 182.5MB. Free memory was 127.9MB in the beginning and 126.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 20:59:45,497 INFO L158 Benchmark]: RCFGBuilder took 377.00ms. Allocated memory is still 182.5MB. Free memory was 126.0MB in the beginning and 110.7MB in the end (delta: 15.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-03-31 20:59:45,497 INFO L158 Benchmark]: TraceAbstraction took 614.04ms. Allocated memory is still 182.5MB. Free memory was 110.2MB in the beginning and 90.2MB in the end (delta: 20.1MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-03-31 20:59:45,498 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 182.5MB. Free memory is still 136.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 144.70ms. Allocated memory is still 182.5MB. Free memory was 138.5MB in the beginning and 128.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.25ms. Allocated memory is still 182.5MB. Free memory was 127.9MB in the beginning and 126.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 377.00ms. Allocated memory is still 182.5MB. Free memory was 126.0MB in the beginning and 110.7MB in the end (delta: 15.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 614.04ms. Allocated memory is still 182.5MB. Free memory was 110.2MB in the beginning and 90.2MB in the end (delta: 20.1MB). Peak memory consumption was 19.9MB. 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 *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 0 [L33] i=1 VAL [N=1, \old(N)=0, a={4:0}, b={5:0}, i=1] [L33] COND FALSE !(i