/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 OctagonDomain -i ../sv-benchmarks/c/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:45:14,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:45:14,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:45:14,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:45:14,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:45:14,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:45:14,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:45:14,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:45:14,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:45:14,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:45:14,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:45:14,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:45:14,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:45:14,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:45:14,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:45:14,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:45:14,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:45:14,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:45:14,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:45:14,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:45:14,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:45:14,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:45:14,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:45:14,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:45:14,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:45:14,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:45:14,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:45:14,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:45:14,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:45:14,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:45:14,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:45:14,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:45:14,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:45:14,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:45:14,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:45:14,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:45:14,250 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 02:45:14,277 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:45:14,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:45:14,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:45:14,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:45:14,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:45:14,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:45:14,278 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:45:14,279 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:45:14,279 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:45:14,279 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:45:14,279 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:45:14,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:45:14,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:45:14,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:45:14,280 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:45:14,280 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:45:14,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:45:14,280 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:45:14,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:45:14,281 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:45:14,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:45:14,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:45:14,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:45:14,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:45:14,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:45:14,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:45:14,282 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:45:14,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:45:14,282 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:45:14,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:45:14,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:45:14,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:45:14,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:45:14,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:45:14,283 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:45:14,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:45:14,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:45:14,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:45:14,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:45:14,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:45:14,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:45:14,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:45:14,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:45:14,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:45:14,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:45:14,521 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:45:14,521 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:45:14,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2023-04-01 02:45:15,737 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:45:15,899 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:45:15,899 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2023-04-01 02:45:15,905 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5b92a99/e498a5ea0cb14169ac073ee23906069e/FLAGe1e19c5f4 [2023-04-01 02:45:15,915 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b5b92a99/e498a5ea0cb14169ac073ee23906069e [2023-04-01 02:45:15,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:45:15,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:45:15,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:45:15,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:45:15,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:45:15,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:45:15" (1/1) ... [2023-04-01 02:45:15,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dad0909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:15, skipping insertion in model container [2023-04-01 02:45:15,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:45:15" (1/1) ... [2023-04-01 02:45:15,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:45:15,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:45:16,080 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/reducercommutativity/rangesum.i[1544,1557] [2023-04-01 02:45:16,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:45:16,096 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:45:16,131 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/reducercommutativity/rangesum.i[1544,1557] [2023-04-01 02:45:16,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:45:16,145 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:45:16,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16 WrapperNode [2023-04-01 02:45:16,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:45:16,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:45:16,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:45:16,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:45:16,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,194 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:45:16,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:45:16,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:45:16,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:45:16,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (1/1) ... [2023-04-01 02:45:16,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:45:16,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:16,226 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 02:45:16,233 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 02:45:16,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:45:16,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:45:16,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:45:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2023-04-01 02:45:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-04-01 02:45:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:45:16,263 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:45:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:45:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:45:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:45:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:45:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:45:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:45:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:45:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:45:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:45:16,354 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:45:16,356 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:45:16,603 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:45:16,657 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:45:16,658 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:45:16,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:45:16 BoogieIcfgContainer [2023-04-01 02:45:16,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:45:16,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:45:16,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:45:16,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:45:16,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:45:15" (1/3) ... [2023-04-01 02:45:16,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca7e552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:45:16, skipping insertion in model container [2023-04-01 02:45:16,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:45:16" (2/3) ... [2023-04-01 02:45:16,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca7e552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:45:16, skipping insertion in model container [2023-04-01 02:45:16,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:45:16" (3/3) ... [2023-04-01 02:45:16,673 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum.i [2023-04-01 02:45:16,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:45:16,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:45:16,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:45:16,737 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;@46d745a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:45:16,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:45:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:45:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:45:16,750 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:16,750 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, 1, 1, 1] [2023-04-01 02:45:16,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:16,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash -320671087, now seen corresponding path program 1 times [2023-04-01 02:45:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:16,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010308728] [2023-04-01 02:45:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:16,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:16,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:16,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010308728] [2023-04-01 02:45:16,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 02:45:16,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272122887] [2023-04-01 02:45:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:16,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:16,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:16,972 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 02:45:16,985 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 02:45:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:17,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:45:17,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:45:17,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:45:17,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272122887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:45:17,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:45:17,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:45:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902830714] [2023-04-01 02:45:17,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:45:17,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:45:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:45:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:45:17,235 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 02:45:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:17,322 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-04-01 02:45:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:45:17,325 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2023-04-01 02:45:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:17,330 INFO L225 Difference]: With dead ends: 54 [2023-04-01 02:45:17,331 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 02:45:17,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:45:17,338 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:17,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:45:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 02:45:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 02:45:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:45:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 02:45:17,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 02:45:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:17,372 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 02:45:17,372 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 02:45:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 02:45:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 02:45:17,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:17,374 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, 1, 1, 1, 1] [2023-04-01 02:45:17,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:17,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 02:45:17,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:17,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2030063906, now seen corresponding path program 1 times [2023-04-01 02:45:17,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:17,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652890770] [2023-04-01 02:45:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:17,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:45:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199003943] [2023-04-01 02:45:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:17,635 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 02:45:17,638 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 02:45:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:17,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:45:17,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:45:17,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:45:17,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:17,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652890770] [2023-04-01 02:45:17,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:45:17,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199003943] [2023-04-01 02:45:17,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199003943] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483596927] [2023-04-01 02:45:17,906 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 02:45:17,906 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:17,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:17,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:17,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:17,997 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:45:18,170 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 39 for LOIs [2023-04-01 02:45:18,287 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 20 for LOIs [2023-04-01 02:45:18,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:45:18,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:18,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1483596927] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:45:18,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:45:18,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [5, 6] total 20 [2023-04-01 02:45:18,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228072899] [2023-04-01 02:45:18,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:45:18,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:45:18,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:18,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:45:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-04-01 02:45:18,828 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 02:45:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:19,312 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-04-01 02:45:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:45:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 30 [2023-04-01 02:45:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:19,313 INFO L225 Difference]: With dead ends: 38 [2023-04-01 02:45:19,313 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 02:45:19,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-04-01 02:45:19,315 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:19,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 38 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:45:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 02:45:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 02:45:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:45:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-01 02:45:19,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 30 [2023-04-01 02:45:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:19,329 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-01 02:45:19,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 02:45:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-01 02:45:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 02:45:19,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:19,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:45:19,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:19,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 02:45:19,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:19,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1980889047, now seen corresponding path program 1 times [2023-04-01 02:45:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341211533] [2023-04-01 02:45:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:19,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:19,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:45:19,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944797201] [2023-04-01 02:45:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:19,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:19,563 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 02:45:19,583 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 02:45:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:19,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:45:19,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:45:19,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:45:19,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341211533] [2023-04-01 02:45:19,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:45:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944797201] [2023-04-01 02:45:19,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944797201] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:19,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714737229] [2023-04-01 02:45:19,751 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 02:45:19,751 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:19,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:19,752 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:19,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:19,781 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:45:22,139 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 39 for LOIs [2023-04-01 02:45:22,178 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 37 for LOIs [2023-04-01 02:45:22,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:45:22,729 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:23,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [714737229] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:45:23,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:45:23,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [5, 6] total 24 [2023-04-01 02:45:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924566116] [2023-04-01 02:45:23,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:45:24,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 02:45:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 02:45:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=464, Unknown=1, NotChecked=0, Total=552 [2023-04-01 02:45:24,001 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:45:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:24,709 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-04-01 02:45:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 02:45:24,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2023-04-01 02:45:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:24,711 INFO L225 Difference]: With dead ends: 36 [2023-04-01 02:45:24,711 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 02:45:24,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=848, Unknown=1, NotChecked=0, Total=992 [2023-04-01 02:45:24,713 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:24,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 44 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 265 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:45:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 02:45:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 02:45:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:45:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-01 02:45:24,723 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2023-04-01 02:45:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:24,725 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-01 02:45:24,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:45:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-01 02:45:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 02:45:24,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:24,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:45:24,737 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 02:45:24,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:24,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:24,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:24,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1203147266, now seen corresponding path program 1 times [2023-04-01 02:45:24,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:24,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390201455] [2023-04-01 02:45:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:24,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:24,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:45:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216450456] [2023-04-01 02:45:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:24,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:24,960 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 02:45:24,963 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 02:45:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:45:25,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:45:25,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:45:25,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:45:25,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390201455] [2023-04-01 02:45:25,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:45:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216450456] [2023-04-01 02:45:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216450456] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:25,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264176167] [2023-04-01 02:45:25,159 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 02:45:25,159 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:25,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:25,159 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:25,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:25,188 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:45:28,799 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 39 for LOIs [2023-04-01 02:45:28,832 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 37 for LOIs [2023-04-01 02:45:29,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:45:29,161 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:30,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1086#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= ~N~0 2147483647) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= ~N~0 (+ main_~i~2 1)) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 2 ~N~0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:45:30,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:45:30,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:45:30,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2023-04-01 02:45:30,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191549183] [2023-04-01 02:45:30,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:45:30,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:45:30,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:45:30,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=633, Unknown=8, NotChecked=0, Total=756 [2023-04-01 02:45:30,934 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 02:45:30,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:30,994 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-04-01 02:45:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:45:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2023-04-01 02:45:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:30,996 INFO L225 Difference]: With dead ends: 45 [2023-04-01 02:45:30,996 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 02:45:30,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=115, Invalid=633, Unknown=8, NotChecked=0, Total=756 [2023-04-01 02:45:30,998 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:30,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 47 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:45:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 02:45:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 02:45:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:45:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 02:45:31,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2023-04-01 02:45:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:31,006 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 02:45:31,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 02:45:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 02:45:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 02:45:31,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:31,007 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, 1, 1, 1, 1] [2023-04-01 02:45:31,017 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 02:45:31,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:31,214 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:31,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 615687697, now seen corresponding path program 2 times [2023-04-01 02:45:31,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:31,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94191107] [2023-04-01 02:45:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:31,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:31,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:45:31,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39579165] [2023-04-01 02:45:31,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:45:31,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:31,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:31,243 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 02:45:31,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:45:31,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:45:31,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:45:31,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:45:31,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 02:45:31,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 02:45:31,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:45:31,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94191107] [2023-04-01 02:45:31,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:45:31,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39579165] [2023-04-01 02:45:31,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39579165] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:45:31,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539154689] [2023-04-01 02:45:31,415 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 02:45:31,415 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:45:31,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:45:31,416 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:45:31,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:45:31,432 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:45:33,828 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 39 for LOIs [2023-04-01 02:45:33,865 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 37 for LOIs [2023-04-01 02:45:34,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:45:34,208 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:45:35,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1436#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= ~N~0 2147483647) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= ~N~0 (+ main_~i~2 1)) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 2 ~N~0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:45:35,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:45:35,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:45:35,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2023-04-01 02:45:35,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414950935] [2023-04-01 02:45:35,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:45:35,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:45:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:45:35,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:45:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=633, Unknown=8, NotChecked=0, Total=756 [2023-04-01 02:45:35,827 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:45:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:45:35,887 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-04-01 02:45:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:45:35,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 35 [2023-04-01 02:45:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:45:35,888 INFO L225 Difference]: With dead ends: 43 [2023-04-01 02:45:35,889 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 02:45:35,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=633, Unknown=8, NotChecked=0, Total=756 [2023-04-01 02:45:35,890 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:45:35,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:45:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 02:45:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 02:45:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:45:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 02:45:35,898 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 35 [2023-04-01 02:45:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:45:35,899 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 02:45:35,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:45:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 02:45:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 02:45:35,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:45:35,900 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:45:35,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:45:36,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:36,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:45:36,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:45:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1021011018, now seen corresponding path program 3 times [2023-04-01 02:45:36,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:45:36,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298182484] [2023-04-01 02:45:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:45:36,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:45:36,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:45:36,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218373277] [2023-04-01 02:45:36,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:45:36,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:45:36,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:45:36,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:45:36,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:45:36,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:45:36,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:45:36,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 02:45:36,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:45:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:45:36,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:45:37,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:45:37,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 49 [2023-04-01 02:45:52,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:45:52,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 265