/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-crafted/xor5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:50:31,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:50:31,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:50:31,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:50:31,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:50:31,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:50:31,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:50:31,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:50:31,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:50:31,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:50:31,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:50:31,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:50:31,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:50:31,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:50:31,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:50:31,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:50:31,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:50:31,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:50:31,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:50:31,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:50:31,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:50:31,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:50:31,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:50:31,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:50:31,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:50:31,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:50:31,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:50:31,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:50:31,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:50:31,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:50:31,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:50:31,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:50:31,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:50:31,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:50:31,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:50:31,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:50:31,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:50:31,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:50:31,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:50:31,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:50:31,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:50:31,635 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 20:50:31,649 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:50:31,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:50:31,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:50:31,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:50:31,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:50:31,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:50:31,650 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:50:31,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:50:31,650 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:50:31,651 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:50:31,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:50:31,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:50:31,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:50:31,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:50:31,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:50:31,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:50:31,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:50:31,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:50:31,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:50:31,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:50:31,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:50:31,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:50:31,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:50:31,865 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:50:31,865 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:50:31,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor5.i [2023-03-31 20:50:32,830 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:50:33,012 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:50:33,012 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2023-03-31 20:50:33,020 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee3e0cd4/4d96760908f740a1b41521b9e5fad6ad/FLAGa29b53798 [2023-03-31 20:50:33,032 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ee3e0cd4/4d96760908f740a1b41521b9e5fad6ad [2023-03-31 20:50:33,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:50:33,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:50:33,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:50:33,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:50:33,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:50:33,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55511273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33, skipping insertion in model container [2023-03-31 20:50:33,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:50:33,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:50:33,175 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-crafted/xor5.i[1364,1377] [2023-03-31 20:50:33,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:50:33,194 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:50:33,218 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-crafted/xor5.i[1364,1377] [2023-03-31 20:50:33,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:50:33,228 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:50:33,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33 WrapperNode [2023-03-31 20:50:33,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:50:33,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:50:33,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:50:33,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:50:33,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:50:33,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:50:33,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:50:33,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:50:33,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (1/1) ... [2023-03-31 20:50:33,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:50:33,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:33,295 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 20:50:33,313 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 20:50:33,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:50:33,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:50:33,329 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:50:33,330 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-03-31 20:50:33,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-03-31 20:50:33,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:50:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:50:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:50:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:50:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:50:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:50:33,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:50:33,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:50:33,406 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:50:33,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:50:33,574 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:50:33,631 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:50:33,631 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 20:50:33,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:50:33 BoogieIcfgContainer [2023-03-31 20:50:33,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:50:33,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:50:33,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:50:33,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:50:33,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:50:33" (1/3) ... [2023-03-31 20:50:33,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152b1b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:50:33, skipping insertion in model container [2023-03-31 20:50:33,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:50:33" (2/3) ... [2023-03-31 20:50:33,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152b1b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:50:33, skipping insertion in model container [2023-03-31 20:50:33,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:50:33" (3/3) ... [2023-03-31 20:50:33,638 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2023-03-31 20:50:33,650 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:50:33,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:50:33,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:50:33,686 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;@775aafd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:50:33,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:50:33,690 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), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:50:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 20:50:33,695 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:33,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:33,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:33,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1558770381, now seen corresponding path program 1 times [2023-03-31 20:50:33,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:33,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405743277] [2023-03-31 20:50:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:33,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:50:33,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:33,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405743277] [2023-03-31 20:50:33,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405743277] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:50:33,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:50:33,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:50:33,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474006094] [2023-03-31 20:50:33,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:50:33,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:50:33,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:33,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:50:33,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:50:33,964 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), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:50:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:34,034 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-03-31 20:50:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:50:34,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-03-31 20:50:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:34,044 INFO L225 Difference]: With dead ends: 44 [2023-03-31 20:50:34,044 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:50:34,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:50:34,048 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:34,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:50:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:50:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 20:50:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-03-31 20:50:34,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-03-31 20:50:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:34,083 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-03-31 20:50:34,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:50:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-03-31 20:50:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 20:50:34,085 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:34,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:34,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:50:34,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:34,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash -770508391, now seen corresponding path program 1 times [2023-03-31 20:50:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:34,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783650859] [2023-03-31 20:50:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:34,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:50:34,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783650859] [2023-03-31 20:50:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783650859] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:50:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751147920] [2023-03-31 20:50:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:34,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:50:34,274 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 20:50:34,275 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 20:50:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:34,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:50:34,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:50:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:50:34,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:50:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:50:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751147920] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:50:34,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354517217] [2023-03-31 20:50:34,520 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 20:50:34,520 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:50:34,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:50:34,535 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:50:34,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:50:34,629 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:50:34,973 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 20 for LOIs [2023-03-31 20:50:34,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:50:35,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:50:35,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= 1 main_~i~1) (= ~N~0 1) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (= main_~i~2 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:50:35,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:50:35,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:50:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-03-31 20:50:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228162559] [2023-03-31 20:50:35,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:50:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 20:50:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 20:50:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=541, Unknown=4, NotChecked=0, Total=650 [2023-03-31 20:50:35,717 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-03-31 20:50:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:35,785 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-03-31 20:50:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:50:35,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 26 [2023-03-31 20:50:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:35,786 INFO L225 Difference]: With dead ends: 36 [2023-03-31 20:50:35,786 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:50:35,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=589, Unknown=4, NotChecked=0, Total=702 [2023-03-31 20:50:35,787 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:35,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:50:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:50:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 20:50:35,790 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), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-03-31 20:50:35,791 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2023-03-31 20:50:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:35,791 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-03-31 20:50:35,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-03-31 20:50:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-03-31 20:50:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 20:50:35,792 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:35,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:35,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:50:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:50:35,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:35,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1673356592, now seen corresponding path program 1 times [2023-03-31 20:50:35,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:35,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94600282] [2023-03-31 20:50:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:50:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 20:50:36,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:50:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94600282] [2023-03-31 20:50:36,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94600282] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:50:36,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:50:36,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:50:36,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303941095] [2023-03-31 20:50:36,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:50:36,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:50:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:50:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:50:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:50:36,066 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 20:50:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:50:36,091 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-03-31 20:50:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:50:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-03-31 20:50:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:50:36,094 INFO L225 Difference]: With dead ends: 33 [2023-03-31 20:50:36,094 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 20:50:36,094 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 [2023-03-31 20:50:36,096 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:50:36,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:50:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 20:50:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 20:50:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:50:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-03-31 20:50:36,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-03-31 20:50:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:50:36,104 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-03-31 20:50:36,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 20:50:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-03-31 20:50:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 20:50:36,105 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:50:36,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:50:36,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 20:50:36,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:50:36,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:50:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash -330810740, now seen corresponding path program 1 times [2023-03-31 20:50:36,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:50:36,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310880262] [2023-03-31 20:50:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:50:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:50:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 20:50:36,285 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 20:50:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 20:50:36,362 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 20:50:36,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 20:50:36,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 20:50:36,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 20:50:36,368 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-03-31 20:50:36,371 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 20:50:36,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 08:50:36 BoogieIcfgContainer [2023-03-31 20:50:36,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 20:50:36,409 INFO L158 Benchmark]: Toolchain (without parser) took 3374.23ms. Allocated memory was 345.0MB in the beginning and 414.2MB in the end (delta: 69.2MB). Free memory was 310.4MB in the beginning and 255.3MB in the end (delta: 55.1MB). Peak memory consumption was 125.2MB. Max. memory is 8.0GB. [2023-03-31 20:50:36,410 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 206.6MB. Free memory was 150.1MB in the beginning and 149.9MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 20:50:36,410 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.70ms. Allocated memory is still 345.0MB. Free memory was 310.4MB in the beginning and 299.3MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-03-31 20:50:36,410 INFO L158 Benchmark]: Boogie Preprocessor took 39.50ms. Allocated memory is still 345.0MB. Free memory was 299.3MB in the beginning and 297.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-03-31 20:50:36,410 INFO L158 Benchmark]: RCFGBuilder took 363.46ms. Allocated memory is still 345.0MB. Free memory was 297.8MB in the beginning and 277.9MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-03-31 20:50:36,410 INFO L158 Benchmark]: TraceAbstraction took 2774.69ms. Allocated memory was 345.0MB in the beginning and 414.2MB in the end (delta: 69.2MB). Free memory was 277.3MB in the beginning and 255.3MB in the end (delta: 22.0MB). Peak memory consumption was 91.6MB. Max. memory is 8.0GB. [2023-03-31 20:50:36,411 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 206.6MB. Free memory was 150.1MB in the beginning and 149.9MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.70ms. Allocated memory is still 345.0MB. Free memory was 310.4MB in the beginning and 299.3MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.50ms. Allocated memory is still 345.0MB. Free memory was 299.3MB in the beginning and 297.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 363.46ms. Allocated memory is still 345.0MB. Free memory was 297.8MB in the beginning and 277.9MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 2774.69ms. Allocated memory was 345.0MB in the beginning and 414.2MB in the end (delta: 69.2MB). Free memory was 277.3MB in the beginning and 255.3MB in the end (delta: 22.0MB). Peak memory consumption was 91.6MB. 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 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 25. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2, \old(N)=0, i=0, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, \old(N)=0, i=1, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, \old(N)=0, i=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [N=2, \old(N)=0, i=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [N=2, \old(N)=0, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, \old(N)=0, i=1, res=-3, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] EXPR res ^ x[i] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, \old(N)=0, i=2, res=11, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) [L27] return res; [L45] RET, EXPR xor(x) VAL [N=2, \old(N)=0, i=2, x={9:0}, xor(x)=11] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [N=2, \old(N)=0, i=2, ret=11, temp=-3, x={9:0}] [L48] CALL, EXPR xor(x) VAL [N=2, \old(N)=0, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, \old(N)=0, i=1, res=-2, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] EXPR res ^ x[i] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, \old(N)=0, i=2, res=10, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) [L27] return res; [L48] RET, EXPR xor(x) VAL [N=2, \old(N)=0, i=2, ret=11, temp=-3, x={9:0}, xor(x)=10] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2, \old(N)=0, i=0, i=2, ret2=10, ret=11, temp=-2, x={9:0}] [L50] COND TRUE i