/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_25x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:56:12,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:56:12,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:56:12,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:56:12,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:56:12,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:56:12,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:56:12,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:56:12,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:56:12,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:56:12,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:56:12,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:56:12,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:56:12,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:56:12,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:56:12,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:56:12,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:56:12,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:56:12,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:56:12,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:56:12,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:56:12,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:56:12,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:56:12,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:56:12,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:56:12,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:56:12,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:56:12,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:56:12,229 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 18:56:12,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:56:12,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:56:12,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:56:12,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:56:12,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:56:12,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:56:12,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:56:12,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:56:12,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:56:12,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:56:12,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:56:12,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:56:12,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:56:12,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:56:12,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:56:12,245 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:56:12,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:56:12,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:56:12,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:56:12,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:56:12,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:56:12,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:56:12,246 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:56:12,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:56:12,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:56:12,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:56:12,611 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:56:12,612 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:56:12,613 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-08-22 18:56:12,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a699606b2/bd104b1451b44a3d914410a155515622/FLAG531111be8 [2020-08-22 18:56:13,229 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:56:13,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-08-22 18:56:13,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a699606b2/bd104b1451b44a3d914410a155515622/FLAG531111be8 [2020-08-22 18:56:13,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a699606b2/bd104b1451b44a3d914410a155515622 [2020-08-22 18:56:13,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:56:13,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:56:13,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:13,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:56:13,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:56:13,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:13,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cabb57a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13, skipping insertion in model container [2020-08-22 18:56:13,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:13,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:56:13,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:56:13,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:13,860 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:56:13,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:13,891 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:56:13,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13 WrapperNode [2020-08-22 18:56:13,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:13,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:56:13,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:56:13,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:56:13,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:13,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:14,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:14,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:14,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:14,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:14,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (1/1) ... [2020-08-22 18:56:14,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:56:14,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:56:14,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:56:14,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:56:14,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (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 18:56:14,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:56:14,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:56:14,111 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 18:56:14,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:56:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:56:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 18:56:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:56:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:56:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:56:14,329 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:56:14,329 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:56:14,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:14 BoogieIcfgContainer [2020-08-22 18:56:14,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:56:14,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:56:14,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:56:14,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:56:14,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:56:13" (1/3) ... [2020-08-22 18:56:14,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578412f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:14, skipping insertion in model container [2020-08-22 18:56:14,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:13" (2/3) ... [2020-08-22 18:56:14,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578412f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:14, skipping insertion in model container [2020-08-22 18:56:14,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:14" (3/3) ... [2020-08-22 18:56:14,374 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2020-08-22 18:56:14,392 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:56:14,403 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:56:14,438 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:56:14,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:56:14,467 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:56:14,467 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:56:14,468 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:56:14,468 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:56:14,468 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:56:14,469 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:56:14,469 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:56:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 18:56:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 18:56:14,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:14,501 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 18:56:14,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-08-22 18:56:14,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:14,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065421097] [2020-08-22 18:56:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:14,587 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:14,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:14,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:56:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:14,820 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 18:56:14,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065421097] [2020-08-22 18:56:14,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:56:14,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:56:14,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496843268] [2020-08-22 18:56:14,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:56:14,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:56:14,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:56:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:56:14,866 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-22 18:56:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:56:15,050 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-08-22 18:56:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:56:15,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 18:56:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:56:15,073 INFO L225 Difference]: With dead ends: 39 [2020-08-22 18:56:15,073 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 18:56:15,081 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 18:56:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 18:56:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 18:56:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 18:56:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-22 18:56:15,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-08-22 18:56:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:56:15,167 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-22 18:56:15,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:56:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-22 18:56:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 18:56:15,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:15,178 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 18:56:15,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:56:15,180 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-08-22 18:56:15,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:15,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007307082] [2020-08-22 18:56:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:15,335 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:56:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:15,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:15,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:56:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:56:15,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:56:15,430 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: has to be unsat by construction, we do check only for interpolant computation at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:100) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:294) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 18:56:15,437 INFO L168 Benchmark]: Toolchain (without parser) took 1799.29 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 100.9 MB in the beginning and 128.6 MB in the end (delta: -27.8 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:15,438 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 119.1 MB in the beginning and 118.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:56:15,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.21 ms. Allocated memory is still 136.8 MB. Free memory was 100.5 MB in the beginning and 91.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:15,440 INFO L168 Benchmark]: Boogie Preprocessor took 134.24 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 91.3 MB in the beginning and 180.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:15,441 INFO L168 Benchmark]: RCFGBuilder took 308.46 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 168.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:15,442 INFO L168 Benchmark]: TraceAbstraction took 1080.94 ms. Allocated memory is still 201.9 MB. Free memory was 167.1 MB in the beginning and 128.6 MB in the end (delta: 38.5 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:15,448 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 119.1 MB in the beginning and 118.7 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.21 ms. Allocated memory is still 136.8 MB. Free memory was 100.5 MB in the beginning and 91.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.24 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 91.3 MB in the beginning and 180.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.46 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 168.1 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1080.94 ms. Allocated memory is still 201.9 MB. Free memory was 167.1 MB in the beginning and 128.6 MB in the end (delta: 38.5 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: has to be unsat by construction, we do check only for interpolant computation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: has to be unsat by construction, we do check only for interpolant computation: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...