/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:04:58,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:04:58,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:04:58,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:04:58,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:04:58,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:04:58,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:04:58,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:04:58,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:04:58,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:04:58,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:04:58,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:04:58,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:04:58,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:04:58,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:04:58,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:04:58,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:04:58,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:04:58,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:04:58,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:04:58,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:04:58,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:04:58,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:04:58,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:04:58,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 17:04:58,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 17:04:58,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 17:04:58,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 17:04:58,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 17:04:58,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 17:04:58,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:04:58,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:04:58,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:04:58,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:04:58,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:04:58,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:04:58,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:04:58,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:04:58,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:04:58,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:04:58,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:04:58,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:04:58,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:04:58,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:04:58,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:04:58,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:04:58,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:04:58,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:04:58,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:04:58,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:04:58,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:04:58,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:04:58,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:04:58,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:04:58,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:04:58,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:04:58,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:04:58,332 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:04:58,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:04:58,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:04:58,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:04:58,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:04:58,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:04:58,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:04:58,333 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:04:58,596 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:04:58,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:04:58,612 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:04:58,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:04:58,613 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:04:58,614 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-07-17 17:04:58,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f17fa594/25fb89a2c4f94681ae4f2ced48ddadc4/FLAG2902e078b [2020-07-17 17:04:59,110 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:04:59,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2020-07-17 17:04:59,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f17fa594/25fb89a2c4f94681ae4f2ced48ddadc4/FLAG2902e078b [2020-07-17 17:04:59,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f17fa594/25fb89a2c4f94681ae4f2ced48ddadc4 [2020-07-17 17:04:59,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:04:59,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:04:59,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:04:59,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:04:59,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:04:59,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8875f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59, skipping insertion in model container [2020-07-17 17:04:59,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:04:59,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:04:59,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:04:59,709 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:04:59,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:04:59,740 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:04:59,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59 WrapperNode [2020-07-17 17:04:59,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:04:59,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:04:59,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:04:59,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:04:59,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (1/1) ... [2020-07-17 17:04:59,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:04:59,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:04:59,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:04:59,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:04:59,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (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 [2020-07-17 17:04:59,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:04:59,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:04:59,907 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-07-17 17:04:59,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:04:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:04:59,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:04:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-07-17 17:04:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:04:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:04:59,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:05:00,108 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:05:00,109 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:05:00,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:00 BoogieIcfgContainer [2020-07-17 17:05:00,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:05:00,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:05:00,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:05:00,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:05:00,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:04:59" (1/3) ... [2020-07-17 17:05:00,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4963f803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:00, skipping insertion in model container [2020-07-17 17:05:00,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:04:59" (2/3) ... [2020-07-17 17:05:00,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4963f803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:05:00, skipping insertion in model container [2020-07-17 17:05:00,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:05:00" (3/3) ... [2020-07-17 17:05:00,120 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-07-17 17:05:00,130 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:05:00,137 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:05:00,149 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:05:00,167 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:05:00,168 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:05:00,168 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:05:00,168 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:05:00,168 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:05:00,168 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:05:00,168 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:05:00,169 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:05:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-07-17 17:05:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 17:05:00,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:00,195 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] [2020-07-17 17:05:00,196 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash 935018920, now seen corresponding path program 1 times [2020-07-17 17:05:00,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:00,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152016791] [2020-07-17 17:05:00,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:00,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152016791] [2020-07-17 17:05:00,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:00,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 17:05:00,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569910957] [2020-07-17 17:05:00,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:05:00,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:05:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:05:00,618 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 9 states. [2020-07-17 17:05:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:00,926 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-07-17 17:05:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:05:00,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-07-17 17:05:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:00,938 INFO L225 Difference]: With dead ends: 56 [2020-07-17 17:05:00,939 INFO L226 Difference]: Without dead ends: 37 [2020-07-17 17:05:00,943 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 [2020-07-17 17:05:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-17 17:05:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-17 17:05:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-17 17:05:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-17 17:05:00,993 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 24 [2020-07-17 17:05:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:00,993 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-17 17:05:00,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:05:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-17 17:05:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 17:05:00,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:00,996 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] [2020-07-17 17:05:00,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:05:00,997 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:00,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2135506668, now seen corresponding path program 1 times [2020-07-17 17:05:00,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:00,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408390822] [2020-07-17 17:05:00,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:05:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:05:01,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408390822] [2020-07-17 17:05:01,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:05:01,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 17:05:01,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928167032] [2020-07-17 17:05:01,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:05:01,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:05:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:05:01,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:05:01,105 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 6 states. [2020-07-17 17:05:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:05:01,188 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-07-17 17:05:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:05:01,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-17 17:05:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:05:01,190 INFO L225 Difference]: With dead ends: 56 [2020-07-17 17:05:01,190 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 17:05:01,192 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 [2020-07-17 17:05:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 17:05:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-17 17:05:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 17:05:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-07-17 17:05:01,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-07-17 17:05:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:05:01,203 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-07-17 17:05:01,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:05:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-07-17 17:05:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 17:05:01,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:05:01,205 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] [2020-07-17 17:05:01,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:05:01,205 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:05:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:05:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1044754306, now seen corresponding path program 1 times [2020-07-17 17:05:01,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:05:01,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960414223] [2020-07-17 17:05:01,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:05:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:05:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:05:01,263 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:05:01,263 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:05:01,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:05:01,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:05:01 BoogieIcfgContainer [2020-07-17 17:05:01,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:05:01,306 INFO L168 Benchmark]: Toolchain (without parser) took 1785.99 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 101.1 MB in the beginning and 84.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 74.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:01,306 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory is still 119.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 17:05:01,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.90 ms. Allocated memory is still 143.1 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:01,309 INFO L168 Benchmark]: Boogie Preprocessor took 23.28 ms. Allocated memory is still 143.1 MB. Free memory was 91.0 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:01,310 INFO L168 Benchmark]: RCFGBuilder took 347.98 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 89.7 MB in the beginning and 165.2 MB in the end (delta: -75.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:01,312 INFO L168 Benchmark]: TraceAbstraction took 1189.40 ms. Allocated memory is still 200.3 MB. Free memory was 164.2 MB in the beginning and 84.1 MB in the end (delta: 80.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:05:01,320 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory is still 119.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 219.90 ms. Allocated memory is still 143.1 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.28 ms. Allocated memory is still 143.1 MB. Free memory was 91.0 MB in the beginning and 89.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.98 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 89.7 MB in the beginning and 165.2 MB in the end (delta: -75.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1189.40 ms. Allocated memory is still 200.3 MB. Free memory was 164.2 MB in the beginning and 84.1 MB in the end (delta: 80.1 MB). Peak memory consumption was 80.1 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(); VAL [__VERIFIER_nondet_int()=0, m=0] [L28] COND FALSE !(m < 0 || m > 1073741823) VAL [m=0] [L33] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, m=0, n=1] [L34] COND FALSE !(n < 0 || n > 1073741823) VAL [m=0, n=1] [L39] CALL, EXPR addition(m,n) VAL [\old(m)=0, \old(n)=1] [L14] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L17] COND TRUE n > 0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L18] CALL, EXPR addition(m+1, n-1) VAL [\old(m)=1, \old(n)=0] [L14] COND TRUE n == 0 VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L15] return m; VAL [\old(m)=1, \old(n)=0, \result=1, m=1, n=0] [L18] RET, EXPR addition(m+1, n-1) VAL [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1] [L18] return addition(m+1, n-1); VAL [\old(m)=0, \old(n)=1, \result=1, addition(m+1, n-1)=1, m=0, n=1] [L39] RET, EXPR addition(m,n) VAL [addition(m,n)=1, m=0, n=1] [L39] int result = addition(m,n); VAL [addition(m,n)=1, m=0, n=1, result=1] [L40] COND FALSE !(result == m - n) VAL [m=0, n=1, result=1] [L43] __VERIFIER_error() VAL [m=0, n=1, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 3437 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...