/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_25x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:56:06,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:56:06,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:56:06,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:56:06,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:56:06,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:56:06,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:56:06,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:56:06,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:56:06,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:56:06,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:56:06,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:56:06,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:56:06,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:56:06,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:56:06,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:56:06,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:56:06,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:56:06,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:56:06,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:56:06,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:56:06,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:56:06,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:56:06,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:56:06,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:56:06,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:56:06,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:56:06,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:56:06,418 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 18:56:06,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:56:06,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:56:06,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:56:06,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:56:06,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:56:06,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:56:06,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:56:06,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:56:06,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:56:06,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:56:06,435 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:56:06,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:56:06,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:56:06,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:56:06,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:56:06,436 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:56:06,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:56:06,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:56:06,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:56:06,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:56:06,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:56:06,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:56:06,437 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:56:06,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:56:06,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:56:06,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:56:06,841 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:56:06,841 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:56:06,842 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-08-22 18:56:06,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb3f3f12/51a012cd1c9441a2bda476100b0bb0a2/FLAG831cc4b8e [2020-08-22 18:56:07,584 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:56:07,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-08-22 18:56:07,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb3f3f12/51a012cd1c9441a2bda476100b0bb0a2/FLAG831cc4b8e [2020-08-22 18:56:07,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb3f3f12/51a012cd1c9441a2bda476100b0bb0a2 [2020-08-22 18:56:07,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:56:07,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:56:07,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:07,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:56:07,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:56:07,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:07" (1/1) ... [2020-08-22 18:56:07,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd7b52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:07, skipping insertion in model container [2020-08-22 18:56:07,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:07" (1/1) ... [2020-08-22 18:56:07,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:56:07,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:56:08,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:08,204 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:56:08,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:08,244 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:56:08,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08 WrapperNode [2020-08-22 18:56:08,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:08,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:56:08,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:56:08,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:56:08,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (1/1) ... [2020-08-22 18:56:08,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (1/1) ... [2020-08-22 18:56:08,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (1/1) ... [2020-08-22 18:56:08,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (1/1) ... [2020-08-22 18:56:08,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (1/1) ... [2020-08-22 18:56:08,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (1/1) ... [2020-08-22 18:56:08,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (1/1) ... [2020-08-22 18:56:08,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:56:08,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:56:08,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:56:08,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:56:08,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (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 18:56:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:56:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:56:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 18:56:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:56:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:56:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 18:56:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:56:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:56:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:56:08,629 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:56:08,629 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:56:08,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:08 BoogieIcfgContainer [2020-08-22 18:56:08,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:56:08,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:56:08,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:56:08,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:56:08,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:56:07" (1/3) ... [2020-08-22 18:56:08,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ab7158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:08, skipping insertion in model container [2020-08-22 18:56:08,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:08" (2/3) ... [2020-08-22 18:56:08,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ab7158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:08, skipping insertion in model container [2020-08-22 18:56:08,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:08" (3/3) ... [2020-08-22 18:56:08,645 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2020-08-22 18:56:08,659 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:56:08,668 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:56:08,721 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:56:08,786 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:56:08,789 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:56:08,789 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:56:08,789 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:56:08,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:56:08,790 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:56:08,790 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:56:08,790 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:56:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 18:56:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 18:56:08,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:08,843 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 18:56:08,844 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:08,851 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-08-22 18:56:08,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:08,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756796972] [2020-08-22 18:56:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:08,923 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:09,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:09,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:56:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:09,095 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 18:56:09,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756796972] [2020-08-22 18:56:09,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:56:09,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:56:09,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844683086] [2020-08-22 18:56:09,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:56:09,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:56:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:56:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:56:09,125 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-22 18:56:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:56:09,246 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-08-22 18:56:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:56:09,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 18:56:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:56:09,259 INFO L225 Difference]: With dead ends: 39 [2020-08-22 18:56:09,260 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 18:56:09,264 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 18:56:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 18:56:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 18:56:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 18:56:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-22 18:56:09,312 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-08-22 18:56:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:56:09,313 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-22 18:56:09,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:56:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-22 18:56:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 18:56:09,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:09,317 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 18:56:09,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:56:09,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-08-22 18:56:09,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:09,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735377590] [2020-08-22 18:56:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:09,449 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:56:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:09,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:09,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:56:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:56:09,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:56:09,549 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 18:56:09,559 INFO L168 Benchmark]: Toolchain (without parser) took 1617.89 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 128.4 MB in the end (delta: -26.4 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:09,567 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:56:09,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.96 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:09,569 INFO L168 Benchmark]: Boogie Preprocessor took 26.60 ms. Allocated memory is still 137.4 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:09,573 INFO L168 Benchmark]: RCFGBuilder took 362.74 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 167.6 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:09,574 INFO L168 Benchmark]: TraceAbstraction took 918.99 ms. Allocated memory is still 200.3 MB. Free memory was 167.6 MB in the beginning and 128.4 MB in the end (delta: 39.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:09,579 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.96 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 92.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.60 ms. Allocated memory is still 137.4 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 362.74 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 167.6 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 918.99 ms. Allocated memory is still 200.3 MB. Free memory was 167.6 MB in the beginning and 128.4 MB in the end (delta: 39.2 MB). Peak memory consumption was 39.2 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...