/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:19:17,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:19:17,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:19:17,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:19:17,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:19:17,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:19:17,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:19:17,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:19:17,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:19:17,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:19:17,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:19:17,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:19:17,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:19:17,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:19:17,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:19:17,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:19:17,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:19:17,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:19:17,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:19:17,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:19:17,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:19:17,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:19:17,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:19:17,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:19:17,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:19:17,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:19:17,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:19:17,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:19:17,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:19:17,730 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:19:17,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:19:17,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:19:17,733 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:19:17,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:19:17,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:19:17,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:19:17,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:19:17,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:19:17,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:19:17,735 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:19:17,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:19:17,735 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:19:17,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:19:17,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:19:17,736 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:19:17,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:19:17,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:19:17,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:19:17,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:19:17,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:19:17,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:19:17,738 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:19:18,008 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:19:18,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:19:18,029 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:19:18,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:19:18,031 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:19:18,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-07-07 13:19:18,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca7e9c4f/29fc3072c50d41f8aed6ff9d753dbc00/FLAG1fabfd6de [2020-07-07 13:19:18,598 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:19:18,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-07-07 13:19:18,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca7e9c4f/29fc3072c50d41f8aed6ff9d753dbc00/FLAG1fabfd6de [2020-07-07 13:19:18,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca7e9c4f/29fc3072c50d41f8aed6ff9d753dbc00 [2020-07-07 13:19:18,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:19:18,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:19:18,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:18,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:19:18,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:19:18,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:18" (1/1) ... [2020-07-07 13:19:18,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38133dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:18, skipping insertion in model container [2020-07-07 13:19:18,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:19:18" (1/1) ... [2020-07-07 13:19:18,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:19:19,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:19:19,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:19,176 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:19:19,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:19:19,208 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:19:19,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19 WrapperNode [2020-07-07 13:19:19,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:19:19,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:19:19,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:19:19,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:19:19,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... [2020-07-07 13:19:19,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... [2020-07-07 13:19:19,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... [2020-07-07 13:19:19,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... [2020-07-07 13:19:19,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... [2020-07-07 13:19:19,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... [2020-07-07 13:19:19,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... [2020-07-07 13:19:19,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:19:19,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:19:19,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:19:19,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:19:19,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-07 13:19:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:19:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:19:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-07 13:19:19,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:19:19,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:19:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-07 13:19:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:19:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:19:19,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:19:19,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:19:19,583 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:19:19,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:19 BoogieIcfgContainer [2020-07-07 13:19:19,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:19:19,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:19:19,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:19:19,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:19:19,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:19:18" (1/3) ... [2020-07-07 13:19:19,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f323981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:19, skipping insertion in model container [2020-07-07 13:19:19,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:19:19" (2/3) ... [2020-07-07 13:19:19,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f323981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:19:19, skipping insertion in model container [2020-07-07 13:19:19,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:19:19" (3/3) ... [2020-07-07 13:19:19,595 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-07-07 13:19:19,606 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:19:19,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:19:19,634 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:19:19,659 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:19:19,659 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:19:19,659 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:19:19,660 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:19:19,660 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:19:19,660 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:19:19,660 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:19:19,660 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:19:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-07 13:19:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 13:19:19,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:19,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:19:19,700 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:19,708 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-07-07 13:19:19,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:19,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322572609] [2020-07-07 13:19:19,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:19:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:19:19,965 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:19,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322572609] [2020-07-07 13:19:19,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:19:19,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:19:19,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598871601] [2020-07-07 13:19:19,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:19:19,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:19:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:19:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:19:19,994 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-07 13:19:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:19:20,082 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-07-07 13:19:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 13:19:20,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-07 13:19:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:19:20,096 INFO L225 Difference]: With dead ends: 39 [2020-07-07 13:19:20,097 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 13:19:20,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:19:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 13:19:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-07 13:19:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 13:19:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-07 13:19:20,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-07-07 13:19:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:19:20,159 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-07 13:19:20,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:19:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-07 13:19:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 13:19:20,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:19:20,162 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:19:20,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:19:20,163 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:19:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:19:20,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-07-07 13:19:20,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:19:20,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282955027] [2020-07-07 13:19:20,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.001s / 0.001s total Resizing node table from 19 to 37 Garbage collection #3: 37 nodes / 0 free / 0.0s / 0.001s total Resizing node table from 37 to 73 Garbage collection #1: 11 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 11 to 19 Garbage collection #2: 19 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 19 to 37 [2020-07-07 13:19:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:19:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:19:20,726 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:19:20,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282955027] [2020-07-07 13:19:20,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:19:20,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 13:19:20,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27909362] [2020-07-07 13:19:20,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 13:19:20,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:19:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 13:19:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-07-07 13:19:20,731 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 16 states. [2020-07-07 13:19:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:19:20,973 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 13:19:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:19:20,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-07-07 13:19:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:19:20,975 INFO L225 Difference]: With dead ends: 25 [2020-07-07 13:19:20,975 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 13:19:20,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-07-07 13:19:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 13:19:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 13:19:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 13:19:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 13:19:20,979 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-07-07 13:19:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:19:20,979 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 13:19:20,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 13:19:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 13:19:20,980 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 13:19:20,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:19:20,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 13:19:21,331 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-07 13:19:21,439 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-07-07 13:19:21,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:19:21,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:19:21,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 13:19:21,465 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 13:19:21,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 13:19:21,466 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 13:19:21,466 INFO L264 CegarLoopResult]: At program point sumEXIT(lines 3 9) the Hoare annotation is: (let ((.cse0 (not (< 0 (+ |sum_#in~n| 1))))) (and (or .cse0 (= sum_~m |sum_#in~m|)) (let ((.cse1 (= sum_~n |sum_#in~n|))) (or .cse0 (and (<= |sum_#in~n| 1) .cse1 (<= |sum_#res| 2147483647) (<= 0 (+ |sum_#res| 2147483648))) (and .cse1 (<= sum_~n 0)))))) [2020-07-07 13:19:21,466 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (or (not (< 0 (+ |sum_#in~n| 1))) (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n))) [2020-07-07 13:19:21,466 INFO L264 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (or (not (< 0 (+ |sum_#in~n| 1))) (and (<= |sum_#in~n| 1) (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n))) [2020-07-07 13:19:21,467 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (let ((.cse0 (not (< 0 (+ |sum_#in~n| 1))))) (and (or .cse0 (= sum_~m |sum_#in~m|)) (or .cse0 (and (= sum_~n |sum_#in~n|) (<= sum_~n 0))))) [2020-07-07 13:19:21,467 INFO L264 CegarLoopResult]: At program point L7-2(line 7) the Hoare annotation is: (or (not (< 0 (+ |sum_#in~n| 1))) (and (<= |sum_#in~n| 1) (= sum_~m |sum_#in~m|) (<= |sum_#t~ret0| 2147483647) (= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= 0 (+ |sum_#t~ret0| 2147483648)))) [2020-07-07 13:19:21,467 INFO L264 CegarLoopResult]: At program point L4(lines 4 8) the Hoare annotation is: (or (not (< 0 (+ |sum_#in~n| 1))) (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|))) [2020-07-07 13:19:21,467 INFO L264 CegarLoopResult]: At program point L7-3(line 7) the Hoare annotation is: (or (not (< 0 (+ |sum_#in~n| 1))) (and (<= |sum_#in~n| 1) (<= 0 (+ |sum_#t~ret0| 2147483648)) (= sum_~m |sum_#in~m|) (<= |sum_#t~ret0| 2147483647) (= sum_~n |sum_#in~n|) (< 0 sum_~n) (= |sum_#res| |sum_#t~ret0|))) [2020-07-07 13:19:21,468 INFO L264 CegarLoopResult]: At program point L3(lines 3 9) the Hoare annotation is: (or (not (< 0 (+ |sum_#in~n| 1))) (= sum_~n |sum_#in~n|)) [2020-07-07 13:19:21,468 INFO L264 CegarLoopResult]: At program point sumFINAL(lines 3 9) the Hoare annotation is: (let ((.cse0 (not (< 0 (+ |sum_#in~n| 1))))) (and (let ((.cse1 (= sum_~n |sum_#in~n|))) (or .cse0 (and (<= |sum_#in~n| 1) .cse1 (<= 0 (+ |sum_#res| 2147483648)) (<= |sum_#res| 2147483647)) (and .cse1 (<= sum_~n 0)))) (or .cse0 (= sum_~m |sum_#in~m|)))) [2020-07-07 13:19:21,468 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-07 13:19:21,469 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: false [2020-07-07 13:19:21,469 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-07 13:19:21,469 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 11 18) the Hoare annotation is: (<= 20 main_~a~0) [2020-07-07 13:19:21,469 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: false [2020-07-07 13:19:21,469 INFO L264 CegarLoopResult]: At program point L15(lines 15 17) the Hoare annotation is: false [2020-07-07 13:19:21,470 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (<= 20 main_~a~0) [2020-07-07 13:19:21,470 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (<= 20 main_~a~0) [2020-07-07 13:19:21,470 INFO L264 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: false [2020-07-07 13:19:21,470 INFO L264 CegarLoopResult]: At program point L15-2(lines 11 18) the Hoare annotation is: (<= 20 main_~a~0) [2020-07-07 13:19:21,470 INFO L264 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: false [2020-07-07 13:19:21,470 INFO L264 CegarLoopResult]: At program point L14-3(line 14) the Hoare annotation is: false [2020-07-07 13:19:21,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:19:21 BoogieIcfgContainer [2020-07-07 13:19:21,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:19:21,494 INFO L168 Benchmark]: Toolchain (without parser) took 2517.96 ms. Allocated memory was 137.4 MB in the beginning and 233.3 MB in the end (delta: 95.9 MB). Free memory was 102.8 MB in the beginning and 128.8 MB in the end (delta: -26.0 MB). Peak memory consumption was 69.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:21,495 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:19:21,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.12 ms. Allocated memory is still 137.4 MB. Free memory was 102.6 MB in the beginning and 92.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:21,497 INFO L168 Benchmark]: Boogie Preprocessor took 29.66 ms. Allocated memory is still 137.4 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:21,498 INFO L168 Benchmark]: RCFGBuilder took 347.44 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 91.5 MB in the beginning and 170.4 MB in the end (delta: -78.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:21,499 INFO L168 Benchmark]: TraceAbstraction took 1903.50 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 169.7 MB in the beginning and 128.8 MB in the end (delta: 40.9 MB). Peak memory consumption was 71.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:19:21,503 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.12 ms. Allocated memory is still 137.4 MB. Free memory was 102.6 MB in the beginning and 92.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.66 ms. Allocated memory is still 137.4 MB. Free memory was 92.8 MB in the beginning and 91.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.44 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 91.5 MB in the beginning and 170.4 MB in the end (delta: -78.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1903.50 ms. Allocated memory was 202.4 MB in the beginning and 233.3 MB in the end (delta: 30.9 MB). Free memory was 169.7 MB in the beginning and 128.8 MB in the end (delta: 40.9 MB). Peak memory consumption was 71.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 3]: Procedure Contract for sum Derived contract for procedure sum: (!(0 < \old(n) + 1) || m == \old(m)) && ((!(0 < \old(n) + 1) || (((\old(n) <= 1 && n == \old(n)) && \result <= 2147483647) && 0 <= \result + 2147483648)) || (n == \old(n) && n <= 0)) - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 20 <= a - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 53 SDslu, 119 SDs, 0 SdLazy, 89 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 27 LocationsWithAnnotation, 37 PreInvPairs, 48 NumberOfFragments, 251 HoareAnnotationTreeSize, 37 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 27 FomulaSimplificationsInter, 110 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...