/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_non_eq-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:31:37,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:31:37,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:31:37,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:31:37,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:31:37,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:31:37,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:31:37,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:31:37,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:31:37,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:31:37,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:31:37,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:31:37,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:31:37,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:31:37,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:31:37,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:31:37,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:31:37,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:31:37,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:31:37,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:31:37,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:31:37,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:31:37,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:31:37,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:31:37,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:31:37,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:31:37,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:31:37,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:31:37,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:31:37,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:31:37,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:31:37,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:31:37,340 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:31:37,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:31:37,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:31:37,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:31:37,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:31:37,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:31:37,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:31:37,341 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:31:37,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:31:37,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:31:37,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:31:37,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:31:37,342 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:31:37,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:31:37,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:31:37,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:31:37,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:31:37,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:31:37,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:31:37,344 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:31:37,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:31:37,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:31:37,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:31:37,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:31:37,826 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:31:37,827 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-09-04 16:31:37,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d819d378/e0800c50fd9e475e8b8676b28ff35d74/FLAGb7c2c8f51 [2020-09-04 16:31:38,465 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:31:38,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-09-04 16:31:38,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d819d378/e0800c50fd9e475e8b8676b28ff35d74/FLAGb7c2c8f51 [2020-09-04 16:31:38,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d819d378/e0800c50fd9e475e8b8676b28ff35d74 [2020-09-04 16:31:38,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:31:38,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:31:38,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:31:38,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:31:38,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:31:38,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:31:38" (1/1) ... [2020-09-04 16:31:38,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa107a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:38, skipping insertion in model container [2020-09-04 16:31:38,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:31:38" (1/1) ... [2020-09-04 16:31:38,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:31:38,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:31:39,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:31:39,168 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:31:39,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:31:39,209 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:31:39,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39 WrapperNode [2020-09-04 16:31:39,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:31:39,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:31:39,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:31:39,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:31:39,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... [2020-09-04 16:31:39,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... [2020-09-04 16:31:39,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... [2020-09-04 16:31:39,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... [2020-09-04 16:31:39,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... [2020-09-04 16:31:39,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... [2020-09-04 16:31:39,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... [2020-09-04 16:31:39,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:31:39,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:31:39,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:31:39,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:31:39,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:31:39,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:31:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:31:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-09-04 16:31:39,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:31:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 16:31:39,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:31:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-09-04 16:31:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:31:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:31:39,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:31:39,650 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:31:39,650 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:31:39,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:31:39 BoogieIcfgContainer [2020-09-04 16:31:39,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:31:39,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:31:39,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:31:39,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:31:39,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:31:38" (1/3) ... [2020-09-04 16:31:39,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba6edf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:31:39, skipping insertion in model container [2020-09-04 16:31:39,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:39" (2/3) ... [2020-09-04 16:31:39,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba6edf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:31:39, skipping insertion in model container [2020-09-04 16:31:39,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:31:39" (3/3) ... [2020-09-04 16:31:39,668 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_non_eq-2.c [2020-09-04 16:31:39,715 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:31:39,742 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:31:39,797 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:31:39,827 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:31:39,828 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:31:39,828 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:31:39,828 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:31:39,828 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:31:39,828 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:31:39,829 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:31:39,829 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:31:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-04 16:31:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 16:31:39,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:31:39,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:31:39,862 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:31:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:31:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1061236160, now seen corresponding path program 1 times [2020-09-04 16:31:39,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:31:39,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993550524] [2020-09-04 16:31:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:31:39,951 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:31:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:40,331 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2020-09-04 16:31:40,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:31:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:40,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:31:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:31:40,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993550524] [2020-09-04 16:31:40,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:31:40,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:31:40,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879588368] [2020-09-04 16:31:40,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:31:40,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:31:40,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:31:40,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:31:40,506 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 8 states. [2020-09-04 16:31:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:31:40,762 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-04 16:31:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 16:31:40,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-04 16:31:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:31:40,780 INFO L225 Difference]: With dead ends: 40 [2020-09-04 16:31:40,780 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 16:31:40,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:31:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 16:31:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 16:31:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 16:31:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-04 16:31:40,849 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2020-09-04 16:31:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:31:40,850 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-04 16:31:40,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:31:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-04 16:31:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 16:31:40,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:31:40,853 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] [2020-09-04 16:31:40,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:31:40,854 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:31:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:31:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash 964161843, now seen corresponding path program 1 times [2020-09-04 16:31:40,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:31:40,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616902719] [2020-09-04 16:31:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:31:40,858 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:31:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:41,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:31:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:41,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-04 16:31:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:41,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:31:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 16:31:41,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616902719] [2020-09-04 16:31:41,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:31:41,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 16:31:41,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508916405] [2020-09-04 16:31:41,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 16:31:41,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:31:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 16:31:41,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:31:41,266 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 10 states. [2020-09-04 16:31:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:31:41,523 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-04 16:31:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 16:31:41,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-09-04 16:31:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:31:41,525 INFO L225 Difference]: With dead ends: 25 [2020-09-04 16:31:41,525 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 16:31:41,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:31:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 16:31:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 16:31:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 16:31:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 16:31:41,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-09-04 16:31:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:31:41,530 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 16:31:41,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 16:31:41,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 16:31:41,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 16:31:41,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:31:41,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 16:31:43,909 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2020-09-04 16:31:43,954 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 16:31:43,955 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 16:31:43,955 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 16:31:43,956 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 16:31:43,956 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 16:31:43,956 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 16:31:43,956 INFO L264 CegarLoopResult]: At program point sumEXIT(lines 4 10) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= |sum_#res| (+ |sum_#in~n| |sum_#in~m| (* 4294967296 (div (+ (* |sum_#in~n| (- 1)) |sum_#res| (* |sum_#in~m| (- 1))) 4294967296))))) [2020-09-04 16:31:43,957 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-09-04 16:31:43,957 INFO L264 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= |sum_#t~ret0| (+ |sum_#in~n| |sum_#in~m| (* 4294967296 (div (+ (* |sum_#in~n| (- 1)) (* |sum_#in~m| (- 1)) |sum_#t~ret0|) 4294967296))))) [2020-09-04 16:31:43,957 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= |sum_#in~n| (* 4294967296 (div |sum_#in~n| 4294967296)))) [2020-09-04 16:31:43,960 INFO L264 CegarLoopResult]: At program point L8-2(line 8) the Hoare annotation is: (let ((.cse0 (* |sum_#in~n| (- 1))) (.cse1 (* |sum_#in~m| (- 1)))) (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= |sum_#t~ret0| (+ |sum_#in~n| |sum_#in~m| (* 4294967296 (div (+ .cse0 .cse1 |sum_#t~ret0|) 4294967296)))) (<= |sum_#res| (+ |sum_#in~n| |sum_#in~m| (* 4294967296 (div (+ .cse0 |sum_#res| .cse1) 4294967296)))))) [2020-09-04 16:31:43,960 INFO L264 CegarLoopResult]: At program point L5(lines 5 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-09-04 16:31:43,961 INFO L264 CegarLoopResult]: At program point L4(lines 4 10) the Hoare annotation is: (= sum_~n |sum_#in~n|) [2020-09-04 16:31:43,961 INFO L264 CegarLoopResult]: At program point sumFINAL(lines 4 10) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= |sum_#res| (+ |sum_#in~n| |sum_#in~m| (* 4294967296 (div (+ (* |sum_#in~n| (- 1)) |sum_#res| (* |sum_#in~m| (- 1))) 4294967296))))) [2020-09-04 16:31:43,961 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 4 10) the Hoare annotation is: true [2020-09-04 16:31:43,962 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: false [2020-09-04 16:31:43,962 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 19) the Hoare annotation is: true [2020-09-04 16:31:43,963 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 12 19) the Hoare annotation is: true [2020-09-04 16:31:43,963 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: false [2020-09-04 16:31:43,965 INFO L264 CegarLoopResult]: At program point L16(lines 16 18) the Hoare annotation is: (let ((.cse1 (+ (* 4294967296 (div main_~result~0 4294967296)) main_~a~0 main_~b~0)) (.cse0 (+ main_~result~0 (* 4294967296 (div (+ main_~a~0 main_~b~0) 4294967296))))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 16:31:43,966 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 16:31:43,966 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 16:31:43,966 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (<= (+ main_~a~0 main_~b~0) (+ |main_#t~ret3| (* 4294967296 (div (+ (* |main_#t~ret3| (- 1)) main_~a~0 main_~b~0) 4294967296)))) [2020-09-04 16:31:43,966 INFO L271 CegarLoopResult]: At program point L16-2(lines 12 19) the Hoare annotation is: true [2020-09-04 16:31:43,966 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-09-04 16:31:43,967 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-09-04 16:31:43,969 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0))) (let ((.cse2 (+ (* 4294967296 (div main_~result~0 4294967296)) main_~a~0 main_~b~0)) (.cse1 (+ main_~result~0 (* 4294967296 (div .cse0 4294967296))))) (and (<= .cse0 (+ |main_#t~ret3| (* 4294967296 (div (+ (* |main_#t~ret3| (- 1)) main_~a~0 main_~b~0) 4294967296)))) (<= .cse1 .cse2) (<= .cse2 .cse1)))) [2020-09-04 16:31:44,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:31:44 BoogieIcfgContainer [2020-09-04 16:31:44,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:31:44,009 INFO L168 Benchmark]: Toolchain (without parser) took 5224.31 ms. Allocated memory was 137.4 MB in the beginning and 230.7 MB in the end (delta: 93.3 MB). Free memory was 101.7 MB in the beginning and 153.1 MB in the end (delta: -51.4 MB). Peak memory consumption was 41.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:44,011 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 16:31:44,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 425.44 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:44,014 INFO L168 Benchmark]: Boogie Preprocessor took 43.11 ms. Allocated memory is still 137.4 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:44,016 INFO L168 Benchmark]: RCFGBuilder took 402.40 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.8 MB in the beginning and 167.8 MB in the end (delta: -77.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:44,019 INFO L168 Benchmark]: TraceAbstraction took 4346.87 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 167.8 MB in the beginning and 153.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:44,031 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 425.44 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.11 ms. Allocated memory is still 137.4 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.40 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.8 MB in the beginning and 167.8 MB in the end (delta: -77.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4346.87 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 167.8 MB in the beginning and 153.1 MB in the end (delta: 14.8 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 4]: Procedure Contract for sum Derived contract for procedure sum: (n == \old(n) && m == \old(m)) && \result <= \old(n) + \old(m) + 4294967296 * ((\old(n) * -1 + \result + \old(m) * -1) / 4294967296) - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 38 SDslu, 143 SDs, 0 SdLazy, 115 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s 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, 36 PreInvPairs, 52 NumberOfFragments, 266 HoareAnnotationTreeSize, 36 FomulaSimplifications, 82 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 27 FomulaSimplificationsInter, 232 FormulaSimplificationTreeSizeReductionInter, 2.3s 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...