/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:47:20,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:47:20,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:47:20,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:47:20,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:47:20,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:47:20,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:47:20,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:47:20,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:47:20,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:47:20,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:47:20,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:47:20,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:47:20,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:47:20,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:47:20,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:47:20,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:47:20,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:47:20,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:47:20,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:47:20,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:47:20,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:47:20,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:47:20,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:47:20,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:47:20,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:47:20,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:47:20,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:47:20,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:47:20,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:47:20,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:47:20,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:47:20,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:47:20,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:47:20,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:47:20,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:47:20,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:47:20,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:47:20,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:47:20,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:47:20,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:47:20,401 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:47:20,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:47:20,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:47:20,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:47:20,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:47:20,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:47:20,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:47:20,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:47:20,403 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:47:20,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:47:20,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:47:20,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:47:20,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:47:20,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:47:20,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:47:20,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:47:20,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:47:20,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:47:20,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:47:20,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:47:20,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:47:20,405 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:47:20,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:47:20,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:47:20,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:47:20,838 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:47:20,839 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:47:20,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_3-1.i [2020-12-23 06:47:20,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5779fba7/a3a3665910f0458e90b2bfdefca46ab9/FLAG2f494abf5 [2020-12-23 06:47:21,485 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:47:21,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-1.i [2020-12-23 06:47:21,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5779fba7/a3a3665910f0458e90b2bfdefca46ab9/FLAG2f494abf5 [2020-12-23 06:47:21,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5779fba7/a3a3665910f0458e90b2bfdefca46ab9 [2020-12-23 06:47:21,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:47:21,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:47:21,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:47:21,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:47:21,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:47:21,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:47:21" (1/1) ... [2020-12-23 06:47:21,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de10702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:21, skipping insertion in model container [2020-12-23 06:47:21,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:47:21" (1/1) ... [2020-12-23 06:47:21,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:47:21,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:47:22,163 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:47:22,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:47:22,197 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:47:22,213 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-1.i[849,862] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:47:22,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:47:22,245 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:47:22,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22 WrapperNode [2020-12-23 06:47:22,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:47:22,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:47:22,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:47:22,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:47:22,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:47:22,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:47:22,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:47:22,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:47:22,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... [2020-12-23 06:47:22,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:47:22,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:47:22,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:47:22,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:47:22,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:47:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:47:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:47:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:47:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:47:22,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:47:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:47:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:47:22,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:47:22,703 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:47:22,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:22 BoogieIcfgContainer [2020-12-23 06:47:22,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:47:22,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:47:22,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:47:22,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:47:22,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:47:21" (1/3) ... [2020-12-23 06:47:22,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c464ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:47:22, skipping insertion in model container [2020-12-23 06:47:22,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:47:22" (2/3) ... [2020-12-23 06:47:22,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c464ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:47:22, skipping insertion in model container [2020-12-23 06:47:22,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:22" (3/3) ... [2020-12-23 06:47:22,714 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-12-23 06:47:22,729 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:47:22,739 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:47:22,801 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:47:22,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:47:22,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:47:22,865 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:47:22,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:47:22,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:47:22,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:47:22,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:47:22,866 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:47:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 06:47:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:47:22,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:22,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:22,896 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash 212411183, now seen corresponding path program 1 times [2020-12-23 06:47:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:22,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285293530] [2020-12-23 06:47:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:23,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285293530] [2020-12-23 06:47:23,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:47:23,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:47:23,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72903466] [2020-12-23 06:47:23,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:47:23,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:47:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:47:23,188 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 06:47:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:23,207 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-12-23 06:47:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:47:23,209 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 06:47:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:23,221 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:47:23,222 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:47:23,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:47:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:47:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:47:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:47:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-23 06:47:23,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-12-23 06:47:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:23,265 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-23 06:47:23,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:47:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-23 06:47:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:47:23,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:23,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:23,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:47:23,268 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2018507400, now seen corresponding path program 1 times [2020-12-23 06:47:23,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:23,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873061882] [2020-12-23 06:47:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:23,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873061882] [2020-12-23 06:47:23,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:47:23,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:47:23,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25921458] [2020-12-23 06:47:23,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:47:23,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:47:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:47:23,405 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-12-23 06:47:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:23,448 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-23 06:47:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:47:23,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 06:47:23,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:23,450 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:47:23,450 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:47:23,451 INFO L677 BasicCegarLoop]: 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 [2020-12-23 06:47:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:47:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2020-12-23 06:47:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:47:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-23 06:47:23,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2020-12-23 06:47:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:23,457 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-23 06:47:23,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:47:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-23 06:47:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:47:23,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:23,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:23,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:47:23,459 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:23,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1562587830, now seen corresponding path program 1 times [2020-12-23 06:47:23,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:23,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811220539] [2020-12-23 06:47:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:23,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811220539] [2020-12-23 06:47:23,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960085705] [2020-12-23 06:47:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:47:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:47:23,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:23,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:47:23,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945233164] [2020-12-23 06:47:23,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:47:23,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:47:23,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:23,677 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-23 06:47:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:23,732 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-23 06:47:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:47:23,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 06:47:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:23,734 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:47:23,734 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:47:23,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:47:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-12-23 06:47:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:47:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-23 06:47:23,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2020-12-23 06:47:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:23,742 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-23 06:47:23,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:47:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-23 06:47:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:47:23,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:23,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:23,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:47:23,957 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1568667532, now seen corresponding path program 2 times [2020-12-23 06:47:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:23,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974798724] [2020-12-23 06:47:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:47:24,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974798724] [2020-12-23 06:47:24,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:47:24,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:47:24,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824727271] [2020-12-23 06:47:24,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:47:24,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:47:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:47:24,030 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-12-23 06:47:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:24,080 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-12-23 06:47:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:47:24,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 06:47:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:24,085 INFO L225 Difference]: With dead ends: 27 [2020-12-23 06:47:24,085 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:47:24,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:47:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 06:47:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:47:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-23 06:47:24,091 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2020-12-23 06:47:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:24,092 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-23 06:47:24,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:47:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-23 06:47:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:47:24,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:24,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:24,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:47:24,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1592576845, now seen corresponding path program 1 times [2020-12-23 06:47:24,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:24,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054924664] [2020-12-23 06:47:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:47:24,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054924664] [2020-12-23 06:47:24,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104050704] [2020-12-23 06:47:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:24,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:47:24,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:47:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:47:24,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:47:24,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 06:47:24,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153002097] [2020-12-23 06:47:24,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:47:24,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:47:24,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:47:24,302 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2020-12-23 06:47:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:24,401 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-23 06:47:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:47:24,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-23 06:47:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:24,403 INFO L225 Difference]: With dead ends: 51 [2020-12-23 06:47:24,403 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:47:24,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:47:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:47:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-23 06:47:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:47:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-23 06:47:24,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 17 [2020-12-23 06:47:24,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:24,421 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-23 06:47:24,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:47:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-23 06:47:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:47:24,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:47:24,422 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:47:24,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:47:24,635 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:47:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:47:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash -834386755, now seen corresponding path program 2 times [2020-12-23 06:47:24,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:47:24,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009763191] [2020-12-23 06:47:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:47:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:47:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-23 06:47:24,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009763191] [2020-12-23 06:47:24,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:47:24,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:47:24,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273452715] [2020-12-23 06:47:24,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:47:24,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:47:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:47:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:47:24,704 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2020-12-23 06:47:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:47:24,738 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-23 06:47:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:47:24,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 06:47:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:47:24,739 INFO L225 Difference]: With dead ends: 29 [2020-12-23 06:47:24,739 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:47:24,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:47:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:47:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:47:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:47:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:47:24,741 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-12-23 06:47:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:47:24,741 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:47:24,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:47:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:47:24,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:47:24,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 06:47:24,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:47:24,765 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:47:24,766 INFO L189 CegarLoopUtils]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-12-23 06:47:24,766 INFO L189 CegarLoopUtils]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-12-23 06:47:24,766 INFO L192 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2020-12-23 06:47:24,766 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:47:24,766 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:47:24,766 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:47:24,767 INFO L189 CegarLoopUtils]: For program point L28-1(lines 28 32) no Hoare annotation was computed. [2020-12-23 06:47:24,767 INFO L189 CegarLoopUtils]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2020-12-23 06:47:24,767 INFO L185 CegarLoopUtils]: At program point L28-4(lines 28 32) the Hoare annotation is: (<= ULTIMATE.start_main_~i~0 1023) [2020-12-23 06:47:24,767 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-12-23 06:47:24,767 INFO L189 CegarLoopUtils]: For program point L28-5(lines 28 32) no Hoare annotation was computed. [2020-12-23 06:47:24,767 INFO L189 CegarLoopUtils]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-12-23 06:47:24,767 INFO L192 CegarLoopUtils]: At program point L24-3(lines 24 26) the Hoare annotation is: true [2020-12-23 06:47:24,768 INFO L189 CegarLoopUtils]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2020-12-23 06:47:24,768 INFO L189 CegarLoopUtils]: For program point L20(lines 20 34) no Hoare annotation was computed. [2020-12-23 06:47:24,768 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-23 06:47:24,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:47:24 BoogieIcfgContainer [2020-12-23 06:47:24,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:47:24,785 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:47:24,786 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:47:24,786 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:47:24,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:47:22" (3/4) ... [2020-12-23 06:47:24,790 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:47:24,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 06:47:24,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:47:24,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 06:47:24,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:47:24,845 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/array_3-1.i-witness.graphml [2020-12-23 06:47:24,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:47:24,848 INFO L168 Benchmark]: Toolchain (without parser) took 2988.26 ms. Allocated memory was 152.0 MB in the beginning and 187.7 MB in the end (delta: 35.7 MB). Free memory was 108.5 MB in the beginning and 106.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 38.9 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:24,848 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:47:24,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.32 ms. Allocated memory is still 152.0 MB. Free memory was 108.4 MB in the beginning and 126.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:24,850 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 125.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:24,851 INFO L168 Benchmark]: Boogie Preprocessor took 66.02 ms. Allocated memory is still 152.0 MB. Free memory was 125.5 MB in the beginning and 134.8 MB in the end (delta: -9.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:24,851 INFO L168 Benchmark]: RCFGBuilder took 353.65 ms. Allocated memory is still 152.0 MB. Free memory was 134.4 MB in the beginning and 122.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:24,852 INFO L168 Benchmark]: TraceAbstraction took 2078.22 ms. Allocated memory was 152.0 MB in the beginning and 187.7 MB in the end (delta: 35.7 MB). Free memory was 121.8 MB in the beginning and 108.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:24,853 INFO L168 Benchmark]: Witness Printer took 60.22 ms. Allocated memory is still 187.7 MB. Free memory was 108.3 MB in the beginning and 106.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:47:24,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 152.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 385.32 ms. Allocated memory is still 152.0 MB. Free memory was 108.4 MB in the beginning and 126.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 125.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.02 ms. Allocated memory is still 152.0 MB. Free memory was 125.5 MB in the beginning and 134.8 MB in the end (delta: -9.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 353.65 ms. Allocated memory is still 152.0 MB. Free memory was 134.4 MB in the beginning and 122.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2078.22 ms. Allocated memory was 152.0 MB in the beginning and 187.7 MB in the end (delta: 35.7 MB). Free memory was 121.8 MB in the beginning and 108.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. * Witness Printer took 60.22 ms. Allocated memory is still 187.7 MB. Free memory was 108.3 MB in the beginning and 106.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i <= 1023 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 56 SDslu, 67 SDs, 0 SdLazy, 126 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 11 NumberOfFragments, 5 HoareAnnotationTreeSize, 3 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 2607 SizeOfPredicates, 0 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 37/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...