/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:11:54,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:11:54,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:11:54,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:11:54,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:11:54,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:11:54,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:11:54,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:11:54,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:11:54,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:11:54,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:11:54,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:11:54,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:11:54,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:11:54,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:11:54,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:11:54,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:11:54,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:11:54,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:11:54,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:11:54,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:11:54,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:11:54,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:11:54,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:11:54,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:11:54,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:11:54,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:11:54,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:11:54,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:11:54,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:11:54,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:11:54,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:11:54,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:11:54,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:11:54,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:11:54,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:11:54,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:11:54,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:11:54,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:11:54,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:11:54,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:11:54,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:11:54,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:11:54,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:11:54,528 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:11:54,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:11:54,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:11:54,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:11:54,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:11:54,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:11:54,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:11:54,530 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 22:11:54,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:11:54,854 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:11:54,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:11:54,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:11:54,860 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:11:54,860 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-08-22 22:11:54,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac6feadf/b93ebe8900ad4c3a9572075dc6f87b66/FLAG8e9565101 [2020-08-22 22:11:55,394 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:11:55,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c [2020-08-22 22:11:55,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac6feadf/b93ebe8900ad4c3a9572075dc6f87b66/FLAG8e9565101 [2020-08-22 22:11:55,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac6feadf/b93ebe8900ad4c3a9572075dc6f87b66 [2020-08-22 22:11:55,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:11:55,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:11:55,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:11:55,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:11:55,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:11:55,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:11:55" (1/1) ... [2020-08-22 22:11:55,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528baabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:55, skipping insertion in model container [2020-08-22 22:11:55,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:11:55" (1/1) ... [2020-08-22 22:11:55,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:11:55,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:11:55,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:11:55,994 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:11:56,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:11:56,028 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:11:56,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56 WrapperNode [2020-08-22 22:11:56,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:11:56,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:11:56,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:11:56,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:11:56,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (1/1) ... [2020-08-22 22:11:56,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (1/1) ... [2020-08-22 22:11:56,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (1/1) ... [2020-08-22 22:11:56,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (1/1) ... [2020-08-22 22:11:56,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (1/1) ... [2020-08-22 22:11:56,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (1/1) ... [2020-08-22 22:11:56,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (1/1) ... [2020-08-22 22:11:56,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:11:56,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:11:56,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:11:56,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:11:56,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (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 [2020-08-22 22:11:56,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:11:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:11:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 22:11:56,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:11:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:11:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 22:11:56,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:11:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:11:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:11:56,487 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:11:56,488 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:11:56,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:11:56 BoogieIcfgContainer [2020-08-22 22:11:56,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:11:56,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:11:56,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:11:56,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:11:56,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:11:55" (1/3) ... [2020-08-22 22:11:56,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73234926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:11:56, skipping insertion in model container [2020-08-22 22:11:56,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:11:56" (2/3) ... [2020-08-22 22:11:56,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73234926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:11:56, skipping insertion in model container [2020-08-22 22:11:56,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:11:56" (3/3) ... [2020-08-22 22:11:56,502 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-08-22 22:11:56,524 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:11:56,533 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:11:56,548 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:11:56,572 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:11:56,572 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:11:56,573 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:11:56,573 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:11:56,573 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:11:56,573 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:11:56,573 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:11:56,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:11:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 22:11:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 22:11:56,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:56,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:11:56,604 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:56,611 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-08-22 22:11:56,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:56,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543652293] [2020-08-22 22:11:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:56,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:11:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:56,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:11:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:11:56,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543652293] [2020-08-22 22:11:56,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:11:56,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:11:56,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25075582] [2020-08-22 22:11:56,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:11:56,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:11:56,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:11:56,877 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-22 22:11:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:56,989 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-08-22 22:11:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:11:56,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 22:11:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:57,008 INFO L225 Difference]: With dead ends: 39 [2020-08-22 22:11:57,009 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 22:11:57,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:11:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 22:11:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 22:11:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 22:11:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-22 22:11:57,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-08-22 22:11:57,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:57,073 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-22 22:11:57,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:11:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-22 22:11:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 22:11:57,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:57,076 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] [2020-08-22 22:11:57,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:11:57,077 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-08-22 22:11:57,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:57,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885425817] [2020-08-22 22:11:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:11:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:11:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:11:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 22:11:57,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885425817] [2020-08-22 22:11:57,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:11:57,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:11:57,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223271063] [2020-08-22 22:11:57,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:11:57,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:57,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:11:57,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:11:57,226 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-08-22 22:11:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:57,358 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-08-22 22:11:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:11:57,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-22 22:11:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:57,361 INFO L225 Difference]: With dead ends: 36 [2020-08-22 22:11:57,361 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 22:11:57,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:11:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 22:11:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 22:11:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 22:11:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 22:11:57,383 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-08-22 22:11:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:57,383 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 22:11:57,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:11:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 22:11:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 22:11:57,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:11:57,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:11:57,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:11:57,388 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:11:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:11:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash -175020829, now seen corresponding path program 2 times [2020-08-22 22:11:57,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:11:57,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749847575] [2020-08-22 22:11:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:11:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:11:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 22:11:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:11:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 22:11:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:11:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 22:11:57,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749847575] [2020-08-22 22:11:57,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:11:57,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:11:57,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190907058] [2020-08-22 22:11:57,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:11:57,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:11:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:11:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:11:57,989 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 14 states. [2020-08-22 22:11:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:11:58,418 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-08-22 22:11:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 22:11:58,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-22 22:11:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:11:58,419 INFO L225 Difference]: With dead ends: 30 [2020-08-22 22:11:58,419 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 22:11:58,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:11:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 22:11:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 22:11:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 22:11:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 22:11:58,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-08-22 22:11:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:11:58,422 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 22:11:58,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:11:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 22:11:58,422 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 22:11:58,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:11:58,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 22:11:58,937 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-08-22 22:11:59,108 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-08-22 22:11:59,240 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-08-22 22:11:59,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:11:59,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:11:59,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 22:11:59,266 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 22:11:59,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 22:11:59,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 22:11:59,266 INFO L264 CegarLoopResult]: At program point sumEXIT(lines 3 9) the Hoare annotation is: (and (let ((.cse0 (= sum_~n |sum_#in~n|))) (or (and .cse0 (<= (+ |sum_#in~m| 2) |sum_#res|)) (and .cse0 (<= |sum_#in~n| 1)))) (let ((.cse1 (= sum_~m |sum_#in~m|)) (.cse2 (+ |sum_#in~n| |sum_#in~m|))) (or (and (<= (+ |sum_#in~m| 1) |sum_#res|) .cse1 (<= |sum_#res| .cse2)) (and (<= |sum_#res| |sum_#in~m|) .cse1 (<= .cse2 |sum_#res|))))) [2020-08-22 22:11:59,268 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-08-22 22:11:59,268 INFO L264 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (and (<= |sum_#t~ret0| (+ |sum_#in~n| |sum_#in~m|)) (let ((.cse0 (= sum_~n |sum_#in~n|))) (or (and .cse0 (<= |sum_#in~n| 1)) (and .cse0 (<= (+ |sum_#in~m| 2) |sum_#t~ret0|)))) (= sum_~m |sum_#in~m|) (<= (+ |sum_#in~m| 1) |sum_#t~ret0|)) [2020-08-22 22:11:59,268 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= sum_~n 0)) [2020-08-22 22:11:59,269 INFO L264 CegarLoopResult]: At program point L7-2(line 7) the Hoare annotation is: (and (<= |sum_#t~ret0| (+ |sum_#in~n| |sum_#in~m|)) (let ((.cse0 (= sum_~n |sum_#in~n|))) (or (and .cse0 (<= |sum_#in~n| 1)) (and .cse0 (<= (+ |sum_#in~m| 2) |sum_#t~ret0|)))) (= sum_~m |sum_#in~m|) (<= (+ |sum_#in~m| 1) |sum_#t~ret0|)) [2020-08-22 22:11:59,269 INFO L264 CegarLoopResult]: At program point L4(lines 4 8) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-22 22:11:59,269 INFO L264 CegarLoopResult]: At program point L7-3(line 7) the Hoare annotation is: (let ((.cse1 (+ |sum_#in~n| |sum_#in~m|)) (.cse0 (+ |sum_#in~m| 1))) (and (<= .cse0 |sum_#res|) (<= |sum_#t~ret0| .cse1) (= sum_~m |sum_#in~m|) (<= |sum_#res| .cse1) (<= .cse0 |sum_#t~ret0|) (let ((.cse2 (= sum_~n |sum_#in~n|))) (or (let ((.cse3 (+ |sum_#in~m| 2))) (and .cse2 (<= .cse3 |sum_#res|) (<= .cse3 |sum_#t~ret0|))) (and .cse2 (<= |sum_#in~n| 1)))))) [2020-08-22 22:11:59,269 INFO L264 CegarLoopResult]: At program point L3(lines 3 9) the Hoare annotation is: (= sum_~n |sum_#in~n|) [2020-08-22 22:11:59,270 INFO L264 CegarLoopResult]: At program point sumFINAL(lines 3 9) the Hoare annotation is: (and (let ((.cse0 (= sum_~n |sum_#in~n|))) (or (and .cse0 (<= (+ |sum_#in~m| 2) |sum_#res|)) (and .cse0 (<= |sum_#in~n| 1)))) (let ((.cse1 (= sum_~m |sum_#in~m|)) (.cse2 (+ |sum_#in~n| |sum_#in~m|))) (or (and (<= (+ |sum_#in~m| 1) |sum_#res|) .cse1 (<= |sum_#res| .cse2)) (and (<= |sum_#res| |sum_#in~m|) .cse1 (<= .cse2 |sum_#res|))))) [2020-08-22 22:11:59,270 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-08-22 22:11:59,270 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: false [2020-08-22 22:11:59,270 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-08-22 22:11:59,270 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 11 18) the Hoare annotation is: (<= 2 main_~a~0) [2020-08-22 22:11:59,271 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: false [2020-08-22 22:11:59,271 INFO L264 CegarLoopResult]: At program point L15(lines 15 17) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 main_~result~0) (<= main_~a~0 2) (<= 2 main_~a~0) (<= main_~result~0 .cse0))) [2020-08-22 22:11:59,271 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 2) (<= 2 main_~a~0)) [2020-08-22 22:11:59,271 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= main_~a~0 2) (<= 2 main_~a~0)) [2020-08-22 22:11:59,271 INFO L264 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0))) (and (<= |main_#t~ret1| .cse0) (<= .cse0 |main_#t~ret1|) (<= main_~a~0 2) (<= 2 main_~a~0))) [2020-08-22 22:11:59,272 INFO L264 CegarLoopResult]: At program point L15-2(lines 11 18) the Hoare annotation is: (<= 2 main_~a~0) [2020-08-22 22:11:59,272 INFO L264 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0))) (and (<= |main_#t~ret1| .cse0) (<= .cse0 |main_#t~ret1|) (<= main_~a~0 2) (<= 2 main_~a~0))) [2020-08-22 22:11:59,272 INFO L264 CegarLoopResult]: At program point L14-3(line 14) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 main_~result~0) (<= |main_#t~ret1| .cse0) (<= .cse0 |main_#t~ret1|) (<= main_~a~0 2) (<= 2 main_~a~0) (<= main_~result~0 .cse0))) [2020-08-22 22:11:59,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:11:59 BoogieIcfgContainer [2020-08-22 22:11:59,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:11:59,319 INFO L168 Benchmark]: Toolchain (without parser) took 3543.06 ms. Allocated memory was 144.2 MB in the beginning and 246.9 MB in the end (delta: 102.8 MB). Free memory was 102.1 MB in the beginning and 200.1 MB in the end (delta: -98.0 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:59,321 INFO L168 Benchmark]: CDTParser took 1.06 ms. Allocated memory is still 144.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 22:11:59,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.57 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:59,323 INFO L168 Benchmark]: Boogie Preprocessor took 33.57 ms. Allocated memory is still 144.2 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:59,328 INFO L168 Benchmark]: RCFGBuilder took 429.12 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 91.2 MB in the beginning and 170.3 MB in the end (delta: -79.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:59,329 INFO L168 Benchmark]: TraceAbstraction took 2822.92 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 170.3 MB in the beginning and 200.1 MB in the end (delta: -29.7 MB). Peak memory consumption was 120.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:11:59,334 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06 ms. Allocated memory is still 144.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.57 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.57 ms. Allocated memory is still 144.2 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 429.12 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 91.2 MB in the beginning and 170.3 MB in the end (delta: -79.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2822.92 ms. Allocated memory was 203.4 MB in the beginning and 246.9 MB in the end (delta: 43.5 MB). Free memory was 170.3 MB in the beginning and 200.1 MB in the end (delta: -29.7 MB). Peak memory consumption was 120.2 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: ((n == \old(n) && \old(m) + 2 <= \result) || (n == \old(n) && \old(n) <= 1)) && (((\old(m) + 1 <= \result && m == \old(m)) && \result <= \old(n) + \old(m)) || ((\result <= \old(m) && m == \old(m)) && \old(n) + \old(m) <= \result)) - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 2 <= a - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 60 SDslu, 181 SDs, 0 SdLazy, 193 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 27 LocationsWithAnnotation, 37 PreInvPairs, 67 NumberOfFragments, 336 HoareAnnotationTreeSize, 37 FomulaSimplifications, 160 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 27 FomulaSimplificationsInter, 205 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 10488 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 18/24 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...