/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/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:33:28,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:33:28,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:33:28,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 18:33:28,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:33:28,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:33:28,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:33:28,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:33:28,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:33:28,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:33:28,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:33:28,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:33:28,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:33:28,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:33:28,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:33:28,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:33:28,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:33:28,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:33:28,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:33:28,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:33:28,521 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 18:33:28,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:33:28,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:33:28,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:33:28,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:33:28,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:33:28,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:33:28,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:33:28,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:33:28,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:33:28,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:33:28,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:33:28,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:33:28,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:33:28,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:33:28,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:33:28,538 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:33:28,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:33:28,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:33:28,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:33:28,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:33:28,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:33:28,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:33:28,540 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:33:28,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:33:28,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:33:28,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:33:28,838 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:33:28,838 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:33:28,839 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-08-22 18:33:28,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27816fef/5ef7f2076e784f4f88f20c4e9e0d5930/FLAG9bff67d8e [2020-08-22 18:33:29,349 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:33:29,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2020-08-22 18:33:29,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27816fef/5ef7f2076e784f4f88f20c4e9e0d5930/FLAG9bff67d8e [2020-08-22 18:33:29,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f27816fef/5ef7f2076e784f4f88f20c4e9e0d5930 [2020-08-22 18:33:29,762 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:33:29,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:33:29,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:29,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:33:29,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:33:29,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:29,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18725080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29, skipping insertion in model container [2020-08-22 18:33:29,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:29,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:33:29,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:33:29,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:29,950 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:33:29,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:29,975 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:33:29,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29 WrapperNode [2020-08-22 18:33:29,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:29,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:33:29,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:33:29,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:33:29,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:29,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:30,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:30,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:30,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:30,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:30,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (1/1) ... [2020-08-22 18:33:30,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:33:30,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:33:30,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:33:30,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:33:30,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (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 18:33:30,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:33:30,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:33:30,141 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-08-22 18:33:30,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:33:30,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:33:30,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:33:30,142 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-08-22 18:33:30,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:33:30,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:33:30,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:33:30,345 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:33:30,346 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:33:30,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:30 BoogieIcfgContainer [2020-08-22 18:33:30,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:33:30,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:33:30,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:33:30,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:33:30,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:33:29" (1/3) ... [2020-08-22 18:33:30,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178cd712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:30, skipping insertion in model container [2020-08-22 18:33:30,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:29" (2/3) ... [2020-08-22 18:33:30,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178cd712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:30, skipping insertion in model container [2020-08-22 18:33:30,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:30" (3/3) ... [2020-08-22 18:33:30,362 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-08-22 18:33:30,373 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:33:30,382 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:33:30,399 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:33:30,424 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:33:30,425 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:33:30,425 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:33:30,425 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:33:30,425 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:33:30,425 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:33:30,425 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:33:30,426 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:33:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-08-22 18:33:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 18:33:30,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:30,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:30,456 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:30,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:30,463 INFO L82 PathProgramCache]: Analyzing trace with hash 935018920, now seen corresponding path program 1 times [2020-08-22 18:33:30,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:30,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032258656] [2020-08-22 18:33:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:30,533 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 18:33:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:30,928 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 18:33:30,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032258656] [2020-08-22 18:33:30,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:30,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 18:33:30,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831518547] [2020-08-22 18:33:30,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 18:33:30,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:30,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 18:33:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:33:30,961 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 9 states. [2020-08-22 18:33:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:31,229 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-08-22 18:33:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:33:31,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-22 18:33:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:31,243 INFO L225 Difference]: With dead ends: 56 [2020-08-22 18:33:31,243 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 18:33:31,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:33:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 18:33:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-22 18:33:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 18:33:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-08-22 18:33:31,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 24 [2020-08-22 18:33:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:31,302 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-08-22 18:33:31,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 18:33:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-08-22 18:33:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 18:33:31,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:31,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:31,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:33:31,306 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2135506668, now seen corresponding path program 1 times [2020-08-22 18:33:31,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:31,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441272335] [2020-08-22 18:33:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:31,310 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 18:33:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:31,409 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 18:33:31,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441272335] [2020-08-22 18:33:31,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:31,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:33:31,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742706560] [2020-08-22 18:33:31,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:33:31,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:33:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:31,414 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 6 states. [2020-08-22 18:33:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:31,527 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-22 18:33:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:33:31,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-22 18:33:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:31,532 INFO L225 Difference]: With dead ends: 56 [2020-08-22 18:33:31,543 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 18:33:31,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:33:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 18:33:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-08-22 18:33:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 18:33:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-08-22 18:33:31,558 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-08-22 18:33:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:31,558 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-08-22 18:33:31,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:33:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-08-22 18:33:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:33:31,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:31,562 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:33:31,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:33:31,563 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1044754306, now seen corresponding path program 1 times [2020-08-22 18:33:31,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:31,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210686960] [2020-08-22 18:33:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:31,685 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:33:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:31,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:31,715 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:31,733 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:33:31,734 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:33:31,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:33:31,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:33:31 BoogieIcfgContainer [2020-08-22 18:33:31,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:33:31,755 INFO L168 Benchmark]: Toolchain (without parser) took 1990.97 ms. Allocated memory was 138.9 MB in the beginning and 235.9 MB in the end (delta: 97.0 MB). Free memory was 102.8 MB in the beginning and 190.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:31,756 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 18:33:31,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.83 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:31,758 INFO L168 Benchmark]: Boogie Preprocessor took 102.14 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 181.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:31,759 INFO L168 Benchmark]: RCFGBuilder took 274.48 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:31,760 INFO L168 Benchmark]: TraceAbstraction took 1398.03 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 166.2 MB in the beginning and 190.3 MB in the end (delta: -24.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:31,763 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 209.83 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.14 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 181.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.48 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1398.03 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 166.2 MB in the beginning and 190.3 MB in the end (delta: -24.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L27] int m = __VERIFIER_nondet_int(); [L28] COND FALSE !(m < 0 || m > 1073741823) [L33] int n = __VERIFIER_nondet_int(); [L34] COND FALSE !(n < 0 || n > 1073741823) [L39] CALL, EXPR addition(m,n) [L14] COND FALSE !(n == 0) [L17] COND TRUE n > 0 [L18] CALL, EXPR addition(m+1, n-1) [L14] COND TRUE n == 0 [L15] return m; [L18] RET, EXPR addition(m+1, n-1) [L18] return addition(m+1, n-1); [L39] RET, EXPR addition(m,n) [L39] int result = addition(m,n); [L40] COND FALSE !(result == m - n) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 85 SDslu, 207 SDs, 0 SdLazy, 150 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...