/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/modpf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:01:05,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:01:05,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:01:05,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:01:05,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:01:05,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:01:05,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:01:05,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:01:05,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:01:05,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:01:05,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:01:05,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:01:05,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:01:05,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:01:05,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:01:05,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:01:05,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:01:05,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:01:05,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:01:05,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:01:05,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:01:05,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:01:05,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:01:05,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:01:05,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:01:05,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:01:05,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:01:05,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:01:05,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:01:05,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:01:05,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:01:05,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:01:05,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:01:05,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:01:05,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:01:05,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:01:05,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:01:05,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:01:05,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:01:05,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:01:05,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:01:05,952 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 21:01:05,965 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:01:05,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:01:05,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:01:05,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:01:05,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:01:05,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:01:05,967 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:01:05,967 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:01:05,967 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:01:05,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:01:05,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:01:05,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:01:05,968 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:01:05,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:01:05,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:01:05,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:01:05,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:01:05,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:01:05,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:01:05,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:01:06,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:01:06,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:01:06,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:01:06,190 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:01:06,190 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:01:06,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/modpf.c [2023-03-31 21:01:07,375 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:01:07,532 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:01:07,533 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/modpf.c [2023-03-31 21:01:07,537 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c996904/664a37225e3446fe9153999453d000aa/FLAGf39b3a418 [2023-03-31 21:01:07,550 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c996904/664a37225e3446fe9153999453d000aa [2023-03-31 21:01:07,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:01:07,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:01:07,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:01:07,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:01:07,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:01:07,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b53e662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07, skipping insertion in model container [2023-03-31 21:01:07,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:01:07,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:01:07,669 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/modpf.c[588,601] [2023-03-31 21:01:07,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:01:07,686 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:01:07,695 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/modpf.c[588,601] [2023-03-31 21:01:07,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:01:07,709 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:01:07,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07 WrapperNode [2023-03-31 21:01:07,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:01:07,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:01:07,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:01:07,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:01:07,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,730 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:01:07,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:01:07,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:01:07,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:01:07,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (1/1) ... [2023-03-31 21:01:07,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:01:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:01:07,777 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 21:01:07,782 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 21:01:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:01:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:01:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:01:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 21:01:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 21:01:07,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:01:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:01:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:01:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:01:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:01:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:01:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:01:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:01:07,888 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:01:07,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:01:08,031 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:01:08,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:01:08,055 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 21:01:08,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:01:08 BoogieIcfgContainer [2023-03-31 21:01:08,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:01:08,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:01:08,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:01:08,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:01:08,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:01:07" (1/3) ... [2023-03-31 21:01:08,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6559305d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:01:08, skipping insertion in model container [2023-03-31 21:01:08,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:01:07" (2/3) ... [2023-03-31 21:01:08,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6559305d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:01:08, skipping insertion in model container [2023-03-31 21:01:08,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:01:08" (3/3) ... [2023-03-31 21:01:08,063 INFO L112 eAbstractionObserver]: Analyzing ICFG modpf.c [2023-03-31 21:01:08,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:01:08,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:01:08,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:01:08,137 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;@1e0a18af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:01:08,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:01:08,141 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 21:01:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 21:01:08,147 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:01:08,147 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 21:01:08,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:01:08,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:01:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash -237629243, now seen corresponding path program 1 times [2023-03-31 21:01:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:01:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409413190] [2023-03-31 21:01:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:01:08,271 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:01:08,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829315538] [2023-03-31 21:01:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:01:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:01:08,275 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 21:01:08,277 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 21:01:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:01:08,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 21:01:08,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:01:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:01:08,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:01:08,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:01:08,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409413190] [2023-03-31 21:01:08,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:01:08,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829315538] [2023-03-31 21:01:08,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829315538] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:01:08,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:01:08,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 21:01:08,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936439107] [2023-03-31 21:01:08,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:01:08,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:01:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:01:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:01:08,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:01:08,467 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), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:01:08,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:01:08,517 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-03-31 21:01:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:01:08,519 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), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-03-31 21:01:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:01:08,524 INFO L225 Difference]: With dead ends: 48 [2023-03-31 21:01:08,524 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 21:01:08,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:01:08,528 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:01:08,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:01:08,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 21:01:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-03-31 21:01:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:01:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-03-31 21:01:08,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2023-03-31 21:01:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:01:08,582 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-03-31 21:01:08,582 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), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:01:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-03-31 21:01:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 21:01:08,582 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:01:08,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:01:08,589 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 21:01:08,785 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 21:01:08,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:01:08,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:01:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1421732166, now seen corresponding path program 1 times [2023-03-31 21:01:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:01:08,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696099281] [2023-03-31 21:01:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:08,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:01:08,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:01:08,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971650334] [2023-03-31 21:01:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:01:08,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:01:08,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:01:08,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:01:08,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:01:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 21:01:08,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 21:01:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 21:01:08,900 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 21:01:08,900 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 21:01:08,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 21:01:08,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:01:09,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 21:01:09,108 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-03-31 21:01:09,110 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 21:01:09,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 09:01:09 BoogieIcfgContainer [2023-03-31 21:01:09,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 21:01:09,136 INFO L158 Benchmark]: Toolchain (without parser) took 1582.01ms. Allocated memory is still 257.9MB. Free memory was 211.7MB in the beginning and 140.4MB in the end (delta: 71.3MB). Peak memory consumption was 71.3MB. Max. memory is 8.0GB. [2023-03-31 21:01:09,140 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 169.9MB. Free memory is still 121.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 21:01:09,141 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.84ms. Allocated memory is still 257.9MB. Free memory was 211.2MB in the beginning and 200.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 21:01:09,141 INFO L158 Benchmark]: Boogie Preprocessor took 21.60ms. Allocated memory is still 257.9MB. Free memory was 200.7MB in the beginning and 199.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-03-31 21:01:09,141 INFO L158 Benchmark]: RCFGBuilder took 324.64ms. Allocated memory is still 257.9MB. Free memory was 199.2MB in the beginning and 183.9MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-03-31 21:01:09,142 INFO L158 Benchmark]: TraceAbstraction took 1077.34ms. Allocated memory is still 257.9MB. Free memory was 183.4MB in the beginning and 140.4MB in the end (delta: 43.0MB). Peak memory consumption was 43.0MB. Max. memory is 8.0GB. [2023-03-31 21:01:09,149 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 169.9MB. Free memory is still 121.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 153.84ms. Allocated memory is still 257.9MB. Free memory was 211.2MB in the beginning and 200.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.60ms. Allocated memory is still 257.9MB. Free memory was 200.7MB in the beginning and 199.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 324.64ms. Allocated memory is still 257.9MB. Free memory was 199.2MB in the beginning and 183.9MB in the end (delta: 15.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1077.34ms. Allocated memory is still 257.9MB. Free memory was 183.4MB in the beginning and 140.4MB in the end (delta: 43.0MB). Peak memory consumption was 43.0MB. 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] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [N=1, \old(N)=0, a={4:0}, i=0, sum={6:0}] [L32] COND TRUE i