/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-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:50:21,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:50:21,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:50:21,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:50:21,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:50:21,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:50:21,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:50:21,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:50:21,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:50:21,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:50:21,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:50:21,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:50:21,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:50:21,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:50:21,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:50:21,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:50:21,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:50:21,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:50:21,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:50:21,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:50:21,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:50:21,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:50:21,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:50:21,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:50:21,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:50:21,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:50:21,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:50:21,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:50:21,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:50:21,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:50:21,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:50:21,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:50:21,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:50:21,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:50:21,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:50:21,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:50:21,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:50:21,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:50:21,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:50:21,453 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:50:21,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:50:21,454 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:50:21,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:50:21,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:50:21,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:50:21,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:50:21,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:50:21,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:50:21,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:50:21,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:50:21,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:50:21,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:50:21,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:50:21,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:50:21,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:50:21,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:50:21,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:50:21,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:50:21,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:50:21,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:50:21,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:50:21,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:50:21,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:50:21,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:50:21,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:50:21,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:50:21,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:50:21,943 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:50:21,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested9.i [2021-01-06 16:50:22,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aad2db8a7/e85da75f0f11430abaf417c522d0f2fa/FLAGd8ad34e26 [2021-01-06 16:50:22,650 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:50:22,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i [2021-01-06 16:50:22,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aad2db8a7/e85da75f0f11430abaf417c522d0f2fa/FLAGd8ad34e26 [2021-01-06 16:50:23,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aad2db8a7/e85da75f0f11430abaf417c522d0f2fa [2021-01-06 16:50:23,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:50:23,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:50:23,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:23,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:50:23,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:50:23,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fba9203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23, skipping insertion in model container [2021-01-06 16:50:23,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:50:23,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:50:23,193 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-invgen/nested9.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:50:23,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:23,224 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:50:23,240 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-invgen/nested9.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~m~0,] left hand side expression in assignment: lhs: VariableLHS[~l~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] [2021-01-06 16:50:23,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:23,264 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:50:23,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23 WrapperNode [2021-01-06 16:50:23,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:23,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:23,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:50:23,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:50:23,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:23,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:50:23,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:50:23,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:50:23,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (1/1) ... [2021-01-06 16:50:23,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:50:23,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:50:23,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:50:23,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:50:23,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (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 [2021-01-06 16:50:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:50:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:50:23,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:50:23,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:50:23,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:50:23,902 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:50:23,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:23 BoogieIcfgContainer [2021-01-06 16:50:23,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:50:23,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:50:23,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:50:23,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:50:23,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:50:23" (1/3) ... [2021-01-06 16:50:23,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78cf1dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:23, skipping insertion in model container [2021-01-06 16:50:23,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:23" (2/3) ... [2021-01-06 16:50:23,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78cf1dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:23, skipping insertion in model container [2021-01-06 16:50:23,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:23" (3/3) ... [2021-01-06 16:50:23,917 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2021-01-06 16:50:23,926 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:50:23,933 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:50:23,959 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:50:24,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:50:24,035 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:50:24,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:50:24,036 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:50:24,036 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:50:24,036 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:50:24,036 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:50:24,036 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:50:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 16:50:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:50:24,084 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:24,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:24,085 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash -331449283, now seen corresponding path program 1 times [2021-01-06 16:50:24,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:24,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905193031] [2021-01-06 16:50:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:24,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905193031] [2021-01-06 16:50:24,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:24,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 16:50:24,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146778794] [2021-01-06 16:50:24,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:50:24,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:50:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:50:24,460 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2021-01-06 16:50:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:24,633 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-01-06 16:50:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:50:24,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 16:50:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:24,646 INFO L225 Difference]: With dead ends: 67 [2021-01-06 16:50:24,646 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:50:24,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:50:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:50:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2021-01-06 16:50:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:50:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-01-06 16:50:24,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 12 [2021-01-06 16:50:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:24,694 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-01-06 16:50:24,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:50:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-01-06 16:50:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:50:24,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:24,695 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:24,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:50:24,696 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1296087111, now seen corresponding path program 1 times [2021-01-06 16:50:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:24,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964940978] [2021-01-06 16:50:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:24,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964940978] [2021-01-06 16:50:24,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379415627] [2021-01-06 16:50:24,792 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 [2021-01-06 16:50:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:24,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:50:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:25,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:25,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:25,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:25,056 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:25,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:50:25,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-01-06 16:50:25,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811248154] [2021-01-06 16:50:25,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:50:25,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:50:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:50:25,084 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 7 states. [2021-01-06 16:50:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:25,305 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-01-06 16:50:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:50:25,307 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 16:50:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:25,309 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:50:25,310 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:50:25,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:50:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:50:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 18. [2021-01-06 16:50:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:50:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 16:50:25,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2021-01-06 16:50:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:25,334 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 16:50:25,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:50:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 16:50:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:50:25,336 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:25,336 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:25,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:50:25,552 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:25,553 INFO L82 PathProgramCache]: Analyzing trace with hash -70902445, now seen corresponding path program 1 times [2021-01-06 16:50:25,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:25,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727851745] [2021-01-06 16:50:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:25,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727851745] [2021-01-06 16:50:25,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3659905] [2021-01-06 16:50:25,745 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 [2021-01-06 16:50:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:50:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:50:25,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:50:25,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 16:50:25,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829441305] [2021-01-06 16:50:25,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:50:25,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:50:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:50:25,852 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2021-01-06 16:50:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:25,891 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-01-06 16:50:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:50:25,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 16:50:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:25,892 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:50:25,892 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:50:25,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:50:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:50:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 16:50:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:50:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-01-06 16:50:25,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-01-06 16:50:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:25,900 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-01-06 16:50:25,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:50:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-01-06 16:50:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:50:25,901 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:25,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:26,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:26,116 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:26,118 INFO L82 PathProgramCache]: Analyzing trace with hash 29741143, now seen corresponding path program 1 times [2021-01-06 16:50:26,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:26,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170655760] [2021-01-06 16:50:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:26,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170655760] [2021-01-06 16:50:26,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462167378] [2021-01-06 16:50:26,236 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:50:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:26,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:26,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-01-06 16:50:26,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091854211] [2021-01-06 16:50:26,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:50:26,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:50:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:50:26,428 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 11 states. [2021-01-06 16:50:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:26,634 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-01-06 16:50:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:50:26,635 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2021-01-06 16:50:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:26,636 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:50:26,636 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:50:26,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:50:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:50:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-01-06 16:50:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:50:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 16:50:26,644 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-01-06 16:50:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:26,645 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 16:50:26,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:50:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 16:50:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:50:26,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:26,646 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:26,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:26,860 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 48602575, now seen corresponding path program 1 times [2021-01-06 16:50:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:26,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003325315] [2021-01-06 16:50:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:50:26,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003325315] [2021-01-06 16:50:26,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896252443] [2021-01-06 16:50:26,943 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:27,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:50:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:50:27,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:50:27,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-01-06 16:50:27,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990788184] [2021-01-06 16:50:27,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:50:27,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:50:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:50:27,127 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2021-01-06 16:50:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:27,198 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-01-06 16:50:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:50:27,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-01-06 16:50:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:27,199 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:50:27,199 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:50:27,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:50:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:50:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-01-06 16:50:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:50:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-01-06 16:50:27,207 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2021-01-06 16:50:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:27,208 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-01-06 16:50:27,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:50:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-01-06 16:50:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:50:27,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:27,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:27,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:27,423 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash 67888881, now seen corresponding path program 2 times [2021-01-06 16:50:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:27,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787449392] [2021-01-06 16:50:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:50:27,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787449392] [2021-01-06 16:50:27,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351823603] [2021-01-06 16:50:27,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:27,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 16:50:27,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:50:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:27,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:27,640 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:27,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:27,647 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:50:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 16:50:27,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:27,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 16:50:27,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812034344] [2021-01-06 16:50:27,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:50:27,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:50:27,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:50:27,664 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2021-01-06 16:50:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:27,819 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-01-06 16:50:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:50:27,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-01-06 16:50:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:27,821 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:50:27,821 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:50:27,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:50:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:50:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:50:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:50:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:50:27,823 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-01-06 16:50:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:27,823 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:50:27,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:50:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:50:27,823 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:50:28,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:50:28,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:50:28,287 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-01-06 16:50:28,430 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-01-06 16:50:28,432 INFO L189 CegarLoopUtils]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2021-01-06 16:50:28,433 INFO L185 CegarLoopUtils]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse0 (<= .cse2 ULTIMATE.start_main_~j~0))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 1) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~i~0)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~j~0 .cse2))))) [2021-01-06 16:50:28,433 INFO L189 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-01-06 16:50:28,433 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-01-06 16:50:28,434 INFO L185 CegarLoopUtils]: At program point L36-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse2 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) (<= ULTIMATE.start_main_~i~0 1) .cse2 (<= (div (* ULTIMATE.start_main_~j~0 (- 1)) (- 2)) ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2))) [2021-01-06 16:50:28,434 INFO L189 CegarLoopUtils]: For program point L32(line 32) no Hoare annotation was computed. [2021-01-06 16:50:28,434 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:50:28,434 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:50:28,434 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:50:28,434 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-01-06 16:50:28,435 INFO L189 CegarLoopUtils]: For program point L33(line 33) no Hoare annotation was computed. [2021-01-06 16:50:28,435 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:50:28,435 INFO L189 CegarLoopUtils]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-01-06 16:50:28,435 INFO L192 CegarLoopUtils]: At program point L38(lines 25 40) the Hoare annotation is: true [2021-01-06 16:50:28,435 INFO L189 CegarLoopUtils]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2021-01-06 16:50:28,435 INFO L185 CegarLoopUtils]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 1 ULTIMATE.start_main_~i~0))) (or (= ULTIMATE.start_main_~i~0 0) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (<= ULTIMATE.start_main_~j~0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= 2 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2021-01-06 16:50:28,435 INFO L189 CegarLoopUtils]: For program point L30(line 30) no Hoare annotation was computed. [2021-01-06 16:50:28,436 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-01-06 16:50:28,436 INFO L185 CegarLoopUtils]: At program point L18-2(lines 1 40) the Hoare annotation is: (and (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) [2021-01-06 16:50:28,436 INFO L192 CegarLoopUtils]: At program point L39(lines 25 40) the Hoare annotation is: true [2021-01-06 16:50:28,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:50:28 BoogieIcfgContainer [2021-01-06 16:50:28,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:50:28,477 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:50:28,477 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:50:28,477 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:50:28,481 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:23" (3/4) ... [2021-01-06 16:50:28,488 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:50:28,507 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:50:28,507 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:50:28,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:50:28,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:50:28,613 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-invgen/nested9.i-witness.graphml [2021-01-06 16:50:28,614 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:50:28,615 INFO L168 Benchmark]: Toolchain (without parser) took 5609.17 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 125.8 MB in the beginning and 160.5 MB in the end (delta: -34.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:50:28,615 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:50:28,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.35 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:28,617 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.65 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:28,617 INFO L168 Benchmark]: Boogie Preprocessor took 24.94 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 113.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:28,618 INFO L168 Benchmark]: RCFGBuilder took 570.25 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 99.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:28,619 INFO L168 Benchmark]: TraceAbstraction took 4569.54 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 99.2 MB in the beginning and 163.1 MB in the end (delta: -63.9 MB). Peak memory consumption was 71.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:28,619 INFO L168 Benchmark]: Witness Printer took 136.55 ms. Allocated memory is still 184.5 MB. Free memory was 163.1 MB in the beginning and 160.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:50:28,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.35 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 115.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.65 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.94 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 113.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 570.25 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 99.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4569.54 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 99.2 MB in the beginning and 163.1 MB in the end (delta: -63.9 MB). Peak memory consumption was 71.5 MB. Max. memory is 8.0 GB. * Witness Printer took 136.55 ms. Allocated memory is still 184.5 MB. Free memory was 163.1 MB in the beginning and 160.5 MB in the end (delta: 2.6 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: 19]: 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: 34]: Loop Invariant Derived loop invariant: (i == 0 || ((i <= 1 && 1 <= i) && j <= 2 * i)) || ((2 <= n && 1 <= cond) && 1 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && i < n) && i <= 1) && j < 3 * i) || (((2 * i <= j && i < n) && 1 <= cond) && 1 <= i)) || (((2 * i <= j && i == 0) && i + 1 <= n) && j <= 2 * i) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((2 * i <= j && i < n) && k <= j / 2) && i <= 1) && j < 3 * i) && j * -1 / -2 <= k) || (((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 161 SDslu, 202 SDs, 0 SdLazy, 319 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=4, 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, 51 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 144 HoareAnnotationTreeSize, 6 FomulaSimplifications, 1327 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 101 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 210 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 199 ConstructedInterpolants, 0 QuantifiedInterpolants, 12059 SizeOfPredicates, 17 NumberOfNonLiveVariables, 364 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 56/84 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...