/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-lopstr16/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:03:04,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:03:04,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:03:04,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:03:04,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:03:04,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:03:04,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:03:04,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:03:04,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:03:04,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:03:04,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:03:04,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:03:04,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:03:04,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:03:04,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:03:04,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:03:04,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:03:04,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:03:04,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:03:04,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:03:04,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:03:04,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:03:04,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:03:04,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:03:04,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:03:04,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:03:04,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:03:04,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:03:04,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:03:04,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:03:04,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:03:04,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:03:04,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:03:04,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:03:04,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:03:04,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:03:04,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:03:04,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:03:04,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:03:04,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:03:04,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:03:04,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:03:04,258 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:03:04,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:03:04,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:03:04,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:03:04,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:03:04,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:03:04,259 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:03:04,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:03:04,259 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:03:04,259 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:03:04,259 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:03:04,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:03:04,260 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:03:04,260 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:03:04,260 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:03:04,260 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:03:04,260 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:03:04,260 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:03:04,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:03:04,261 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:03:04,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:03:04,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:03:04,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:03:04,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:03:04,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:03:04,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:03:04,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:03:04,263 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:03:04,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:03:04,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:03:04,263 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:03:04,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:03:04,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:03:04,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:03:04,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:03:04,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:03:04,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:03:04,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:03:04,442 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:03:04,442 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:03:04,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2023-04-01 09:03:05,472 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:03:05,585 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:03:05,585 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/sum_multi_array.i [2023-04-01 09:03:05,589 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a57f3d9a/8d9a5528c75f4e2fa4a5c83f847aa9fc/FLAGaaa4cfbe8 [2023-04-01 09:03:05,598 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a57f3d9a/8d9a5528c75f4e2fa4a5c83f847aa9fc [2023-04-01 09:03:05,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:03:05,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:03:05,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:03:05,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:03:05,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:03:05,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:03:05" (1/1) ... [2023-04-01 09:03:05,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561526f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:05, skipping insertion in model container [2023-04-01 09:03:05,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:03:05" (1/1) ... [2023-04-01 09:03:05,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:03:05,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:03:05,738 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-lopstr16/sum_multi_array.i[808,821] [2023-04-01 09:03:05,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:03:15,635 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:03:15,646 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-lopstr16/sum_multi_array.i[808,821] [2023-04-01 09:03:15,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:03:15,702 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:03:15,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15 WrapperNode [2023-04-01 09:03:15,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:03:15,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:03:15,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:03:15,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:03:15,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:03:15,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:03:15,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:03:15,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:03:15,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (1/1) ... [2023-04-01 09:03:15,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:03:15,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:15,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:03:15,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:03:15,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:03:15,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:03:15,927 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:03:15,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:03:15,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:03:15,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:03:15,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:03:15,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:03:15,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:03:15,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:03:15,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:03:16,035 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:03:16,036 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:03:16,235 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:03:16,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:03:16,282 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:03:16,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:03:16 BoogieIcfgContainer [2023-04-01 09:03:16,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:03:16,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:03:16,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:03:16,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:03:16,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:03:05" (1/3) ... [2023-04-01 09:03:16,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9f5e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:03:16, skipping insertion in model container [2023-04-01 09:03:16,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:15" (2/3) ... [2023-04-01 09:03:16,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9f5e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:03:16, skipping insertion in model container [2023-04-01 09:03:16,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:03:16" (3/3) ... [2023-04-01 09:03:16,313 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2023-04-01 09:03:16,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:03:16,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:03:16,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:03:16,417 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;@7a26984f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:03:16,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:03:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:03:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 09:03:16,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:16,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:16,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:16,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash -182059322, now seen corresponding path program 1 times [2023-04-01 09:03:16,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:16,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545376758] [2023-04-01 09:03:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:16,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:16,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:16,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545376758] [2023-04-01 09:03:16,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545376758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:03:16,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:03:16,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:03:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309384354] [2023-04-01 09:03:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:03:16,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:03:16,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:03:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:03:16,872 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:16,933 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-04-01 09:03:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:03:16,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 09:03:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:16,940 INFO L225 Difference]: With dead ends: 37 [2023-04-01 09:03:16,940 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 09:03:16,942 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 [2023-04-01 09:03:16,944 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:16,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:03:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 09:03:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-04-01 09:03:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 09:03:16,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-01 09:03:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:16,981 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 09:03:16,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 09:03:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 09:03:16,983 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:16,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:16,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:03:16,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:16,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash -179635494, now seen corresponding path program 1 times [2023-04-01 09:03:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554065099] [2023-04-01 09:03:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:03:17,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554065099] [2023-04-01 09:03:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554065099] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209483681] [2023-04-01 09:03:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:17,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:17,155 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) [2023-04-01 09:03:17,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:03:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:17,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 09:03:17,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:03:17,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:03:17,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209483681] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24847134] [2023-04-01 09:03:17,409 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:17,409 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:17,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:17,415 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:17,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:17,857 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2023-04-01 09:03:18,927 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 09:03:18,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 09:03:19,012 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:19,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '196#(and (= |~#c~0.offset| 0) (= 4000000 (select |#length| 5)) (= 1 (select |#valid| 5)) (= 18 (select |#length| 2)) (= 2 (select |#length| 1)) (= 4000000 (select |#length| 4)) (= (select |#valid| 3) 1) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= 3 |~#a~0.base|) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:03:19,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:19,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:19,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 09:03:19,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190020401] [2023-04-01 09:03:19,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:19,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 09:03:19,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:19,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 09:03:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-04-01 09:03:19,879 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:19,935 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-04-01 09:03:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:03:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 09:03:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:19,938 INFO L225 Difference]: With dead ends: 45 [2023-04-01 09:03:19,938 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 09:03:19,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-04-01 09:03:19,941 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:19,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 38 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:03:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 09:03:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2023-04-01 09:03:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 09:03:19,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-04-01 09:03:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:19,950 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 09:03:19,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 09:03:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 09:03:19,951 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:19,951 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:19,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 09:03:20,156 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 [2023-04-01 09:03:20,156 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:20,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1639494726, now seen corresponding path program 2 times [2023-04-01 09:03:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:20,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062755135] [2023-04-01 09:03:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:03:20,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:20,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062755135] [2023-04-01 09:03:20,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062755135] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:20,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512896808] [2023-04-01 09:03:20,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:03:20,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:20,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:20,346 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) [2023-04-01 09:03:20,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:03:20,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:03:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:03:20,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:03:20,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:03:20,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:03:20,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512896808] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:20,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143960310] [2023-04-01 09:03:20,556 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:20,556 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:20,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:20,556 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:20,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:20,680 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2023-04-01 09:03:21,281 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 09:03:21,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 09:03:21,310 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:22,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '450#(and (= |~#c~0.offset| 0) (= 4000000 (select |#length| 5)) (= 1 (select |#valid| 5)) (= 18 (select |#length| 2)) (= 2 (select |#length| 1)) (= 4000000 (select |#length| 4)) (= (select |#valid| 3) 1) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= 3 |~#a~0.base|) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:03:22,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:22,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:22,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 09:03:22,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753408601] [2023-04-01 09:03:22,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:22,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 09:03:22,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 09:03:22,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-04-01 09:03:22,236 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:22,337 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2023-04-01 09:03:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:03:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 09:03:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:22,339 INFO L225 Difference]: With dead ends: 78 [2023-04-01 09:03:22,339 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 09:03:22,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-04-01 09:03:22,343 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:22,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 29 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:03:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 09:03:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2023-04-01 09:03:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-04-01 09:03:22,359 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2023-04-01 09:03:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:22,359 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-04-01 09:03:22,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-04-01 09:03:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 09:03:22,361 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:22,361 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:22,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 09:03:22,565 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,SelfDestructingSolverStorable2 [2023-04-01 09:03:22,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:22,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash -823286650, now seen corresponding path program 3 times [2023-04-01 09:03:22,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:22,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774977139] [2023-04-01 09:03:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:22,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 09:03:22,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774977139] [2023-04-01 09:03:22,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774977139] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409045540] [2023-04-01 09:03:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:03:22,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:22,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:22,748 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:03:22,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:03:22,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:03:22,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:03:22,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 09:03:22,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 09:03:22,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 09:03:22,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409045540] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:22,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490961723] [2023-04-01 09:03:22,994 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:22,994 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:22,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:22,994 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:22,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:23,046 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2023-04-01 09:03:23,305 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 09:03:23,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 09:03:23,331 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:23,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '872#(and (= |~#c~0.offset| 0) (= 4000000 (select |#length| 5)) (= 1 (select |#valid| 5)) (= 18 (select |#length| 2)) (= 2 (select |#length| 1)) (= 4000000 (select |#length| 4)) (= (select |#valid| 3) 1) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= 3 |~#a~0.base|) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:03:23,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:23,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:23,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 09:03:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074379785] [2023-04-01 09:03:23,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:23,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:03:23,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:03:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 09:03:23,964 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:24,172 INFO L93 Difference]: Finished difference Result 144 states and 192 transitions. [2023-04-01 09:03:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 09:03:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-01 09:03:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:24,175 INFO L225 Difference]: With dead ends: 144 [2023-04-01 09:03:24,175 INFO L226 Difference]: Without dead ends: 124 [2023-04-01 09:03:24,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 09:03:24,179 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:24,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 47 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:03:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-01 09:03:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 60. [2023-04-01 09:03:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-04-01 09:03:24,200 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2023-04-01 09:03:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:24,200 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-04-01 09:03:24,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-04-01 09:03:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 09:03:24,205 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:24,205 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:24,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:03:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:24,412 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:24,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1045185798, now seen corresponding path program 4 times [2023-04-01 09:03:24,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:24,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928149696] [2023-04-01 09:03:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 09:03:24,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:24,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928149696] [2023-04-01 09:03:24,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928149696] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:24,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423808765] [2023-04-01 09:03:24,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:03:24,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:24,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:24,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:03:24,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:03:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:25,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 09:03:25,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 09:03:25,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 09:03:25,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423808765] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:25,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523273197] [2023-04-01 09:03:25,706 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:25,706 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:25,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:25,706 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:25,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:25,767 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2023-04-01 09:03:26,007 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 09:03:26,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 28 for LOIs [2023-04-01 09:03:26,033 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:26,699 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1630#(and (= |~#c~0.offset| 0) (= 4000000 (select |#length| 5)) (= 1 (select |#valid| 5)) (= 18 (select |#length| 2)) (= 2 (select |#length| 1)) (= 4000000 (select |#length| 4)) (= (select |#valid| 3) 1) (not (= (select (select |#memory_int| 5) 0) (+ (select (select |#memory_int| 3) 0) (select (select |#memory_int| 4) 0)))) (= |~#b~0.offset| 0) (= 5 |~#c~0.base|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= 3 |~#a~0.base|) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |~#b~0.base| 4) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:03:26,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:26,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:26,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 09:03:26,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868500885] [2023-04-01 09:03:26,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 09:03:26,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 09:03:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=2007, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 09:03:26,703 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:27,148 INFO L93 Difference]: Finished difference Result 276 states and 372 transitions. [2023-04-01 09:03:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 09:03:27,148 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 09:03:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:27,149 INFO L225 Difference]: With dead ends: 276 [2023-04-01 09:03:27,150 INFO L226 Difference]: Without dead ends: 244 [2023-04-01 09:03:27,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1299, Invalid=2007, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 09:03:27,151 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:27,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 92 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:03:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-04-01 09:03:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 108. [2023-04-01 09:03:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2023-04-01 09:03:27,161 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2023-04-01 09:03:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:27,161 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2023-04-01 09:03:27,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2023-04-01 09:03:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 09:03:27,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:27,163 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:27,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 09:03:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:27,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:27,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash -348355066, now seen corresponding path program 5 times [2023-04-01 09:03:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748921273] [2023-04-01 09:03:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-01 09:03:29,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:29,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748921273] [2023-04-01 09:03:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748921273] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:29,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594402291] [2023-04-01 09:03:29,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:03:29,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:29,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:03:29,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process