/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:56:00,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:56:00,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:56:00,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:56:00,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:56:00,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:56:00,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:56:00,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:56:00,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:56:00,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:56:00,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:56:00,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:56:00,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:56:00,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:56:00,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:56:00,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:56:00,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:56:00,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:56:00,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:56:00,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:56:00,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:56:00,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:56:00,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:56:00,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:56:00,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:56:00,297 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 18:56:00,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:56:00,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:56:00,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:56:00,312 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:56:00,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:56:00,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:56:00,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:56:00,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:56:00,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:56:00,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:56:00,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:56:00,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:56:00,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:56:00,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:56:00,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:56:00,315 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:56:00,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:56:00,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:56:00,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:56:00,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:56:00,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:56:00,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:56:00,316 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:56:00,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:56:00,738 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:56:00,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:56:00,746 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:56:00,747 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:56:00,748 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-22 18:56:00,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/703d88de7/541b37a6b21041b5b74213647bb793ca/FLAGe555b1238 [2020-08-22 18:56:01,497 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:56:01,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-08-22 18:56:01,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/703d88de7/541b37a6b21041b5b74213647bb793ca/FLAGe555b1238 [2020-08-22 18:56:01,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/703d88de7/541b37a6b21041b5b74213647bb793ca [2020-08-22 18:56:01,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:56:01,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:56:01,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:01,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:56:01,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:56:01,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:01" (1/1) ... [2020-08-22 18:56:01,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3699edcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:01, skipping insertion in model container [2020-08-22 18:56:01,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:56:01" (1/1) ... [2020-08-22 18:56:01,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:56:01,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:56:02,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:02,158 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:56:02,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:56:02,191 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:56:02,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02 WrapperNode [2020-08-22 18:56:02,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:56:02,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:56:02,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:56:02,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:56:02,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (1/1) ... [2020-08-22 18:56:02,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (1/1) ... [2020-08-22 18:56:02,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (1/1) ... [2020-08-22 18:56:02,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (1/1) ... [2020-08-22 18:56:02,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (1/1) ... [2020-08-22 18:56:02,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (1/1) ... [2020-08-22 18:56:02,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (1/1) ... [2020-08-22 18:56:02,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:56:02,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:56:02,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:56:02,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:56:02,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (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 18:56:02,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:56:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:56:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-22 18:56:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:56:02,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:56:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-22 18:56:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:56:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:56:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:56:02,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:56:02,679 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:56:02,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:02 BoogieIcfgContainer [2020-08-22 18:56:02,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:56:02,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:56:02,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:56:02,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:56:02,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:56:01" (1/3) ... [2020-08-22 18:56:02,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee6bee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:02, skipping insertion in model container [2020-08-22 18:56:02,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:56:02" (2/3) ... [2020-08-22 18:56:02,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee6bee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:56:02, skipping insertion in model container [2020-08-22 18:56:02,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:56:02" (3/3) ... [2020-08-22 18:56:02,697 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-08-22 18:56:02,709 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:56:02,719 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:56:02,737 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:56:02,764 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:56:02,765 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:56:02,765 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:56:02,765 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:56:02,765 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:56:02,765 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:56:02,766 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:56:02,766 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:56:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 18:56:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 18:56:02,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:02,799 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 18:56:02,799 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:02,806 INFO L82 PathProgramCache]: Analyzing trace with hash 989240825, now seen corresponding path program 1 times [2020-08-22 18:56:02,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:02,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405638318] [2020-08-22 18:56:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:02,889 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:56:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:03,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:03,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:56:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:03,095 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 18:56:03,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405638318] [2020-08-22 18:56:03,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:56:03,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:56:03,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630879108] [2020-08-22 18:56:03,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:56:03,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:56:03,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:56:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:56:03,152 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-22 18:56:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:56:03,315 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-08-22 18:56:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:56:03,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-22 18:56:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:56:03,332 INFO L225 Difference]: With dead ends: 39 [2020-08-22 18:56:03,333 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 18:56:03,337 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 18:56:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 18:56:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 18:56:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 18:56:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-22 18:56:03,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2020-08-22 18:56:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:56:03,397 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-22 18:56:03,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:56:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-22 18:56:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 18:56:03,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:56:03,402 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 18:56:03,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:56:03,403 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:56:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:56:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1852726759, now seen corresponding path program 1 times [2020-08-22 18:56:03,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:56:03,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094651949] [2020-08-22 18:56:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:56:03,568 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:56:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:03,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:56:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:56:03,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:56:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:56:03,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:56:03,666 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 18:56:03,681 INFO L168 Benchmark]: Toolchain (without parser) took 1824.46 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 101.0 MB in the beginning and 128.0 MB in the end (delta: -27.0 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:03,682 INFO L168 Benchmark]: CDTParser took 1.04 ms. Allocated memory is still 144.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:56:03,686 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.19 ms. Allocated memory is still 144.2 MB. Free memory was 100.8 MB in the beginning and 91.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:03,688 INFO L168 Benchmark]: Boogie Preprocessor took 165.76 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 180.4 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:03,692 INFO L168 Benchmark]: RCFGBuilder took 324.66 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 168.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:03,697 INFO L168 Benchmark]: TraceAbstraction took 984.93 ms. Allocated memory is still 201.3 MB. Free memory was 167.6 MB in the beginning and 128.6 MB in the end (delta: 39.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2020-08-22 18:56:03,711 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04 ms. Allocated memory is still 144.2 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.19 ms. Allocated memory is still 144.2 MB. Free memory was 100.8 MB in the beginning and 91.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 165.76 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 180.4 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.66 ms. Allocated memory is still 201.3 MB. Free memory was 180.4 MB in the beginning and 168.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 984.93 ms. Allocated memory is still 201.3 MB. Free memory was 167.6 MB in the beginning and 128.6 MB in the end (delta: 39.0 MB). Peak memory consumption was 39.0 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...