/usr/bin/java -ea -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/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-46f3038-m [2020-07-08 15:54:48,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 15:54:48,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 15:54:48,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 15:54:48,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 15:54:48,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 15:54:48,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 15:54:48,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 15:54:48,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 15:54:48,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 15:54:48,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 15:54:48,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 15:54:48,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 15:54:48,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 15:54:48,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 15:54:48,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 15:54:48,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 15:54:48,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 15:54:48,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 15:54:48,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 15:54:48,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 15:54:48,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 15:54:48,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 15:54:48,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 15:54:48,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-08 15:54:48,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 15:54:48,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 15:54:48,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 15:54:48,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-08 15:54:48,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 15:54:48,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 15:54:48,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 15:54:48,538 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 15:54:48,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 15:54:48,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 15:54:48,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 15:54:48,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 15:54:48,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 15:54:48,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 15:54:48,540 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 15:54:48,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 15:54:48,540 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 15:54:48,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 15:54:48,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 15:54:48,541 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 15:54:48,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 15:54:48,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 15:54:48,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 15:54:48,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 15:54:48,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 15:54:48,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 15:54:48,542 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-08 15:54:48,817 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 15:54:48,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 15:54:48,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 15:54:48,833 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 15:54:48,833 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 15:54:48,834 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-08 15:54:48,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a17b324f/4da4e6be04f74fcaa1f7ac48b9d82ebe/FLAG90e6801c4 [2020-07-08 15:54:49,338 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 15:54:49,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-07-08 15:54:49,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a17b324f/4da4e6be04f74fcaa1f7ac48b9d82ebe/FLAG90e6801c4 [2020-07-08 15:54:49,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a17b324f/4da4e6be04f74fcaa1f7ac48b9d82ebe [2020-07-08 15:54:49,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 15:54:49,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 15:54:49,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 15:54:49,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 15:54:49,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 15:54:49,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:49,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@623a5d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49, skipping insertion in model container [2020-07-08 15:54:49,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:49,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 15:54:49,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 15:54:49,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:54:49,947 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 15:54:49,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:54:49,982 INFO L208 MainTranslator]: Completed translation [2020-07-08 15:54:49,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49 WrapperNode [2020-07-08 15:54:49,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 15:54:49,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 15:54:49,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 15:54:49,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 15:54:49,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:49,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:50,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:50,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:50,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:50,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:50,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (1/1) ... [2020-07-08 15:54:50,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 15:54:50,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 15:54:50,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 15:54:50,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 15:54:50,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (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 [2020-07-08 15:54:50,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 15:54:50,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 15:54:50,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-08 15:54:50,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 15:54:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 15:54:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-08 15:54:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-08 15:54:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 15:54:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 15:54:50,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 15:54:50,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 15:54:50,500 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-08 15:54:50,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:54:50 BoogieIcfgContainer [2020-07-08 15:54:50,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 15:54:50,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 15:54:50,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 15:54:50,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 15:54:50,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 03:54:49" (1/3) ... [2020-07-08 15:54:50,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567ef518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:54:50, skipping insertion in model container [2020-07-08 15:54:50,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:54:49" (2/3) ... [2020-07-08 15:54:50,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567ef518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:54:50, skipping insertion in model container [2020-07-08 15:54:50,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:54:50" (3/3) ... [2020-07-08 15:54:50,514 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-07-08 15:54:50,526 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 15:54:50,534 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 15:54:50,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 15:54:50,572 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 15:54:50,572 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 15:54:50,572 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-08 15:54:50,573 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 15:54:50,573 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 15:54:50,573 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 15:54:50,573 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 15:54:50,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 15:54:50,591 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-08 15:54:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-08 15:54:50,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:54:50,604 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] [2020-07-08 15:54:50,605 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:54:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:54:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times [2020-07-08 15:54:50,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:54:50,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050471342] [2020-07-08 15:54:50,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:54:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:54:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:54:50,868 INFO L280 TraceCheckUtils]: 0: Hoare triple {47#true} assume true; {47#true} is VALID [2020-07-08 15:54:50,869 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {47#true} {47#true} #57#return; {47#true} is VALID [2020-07-08 15:54:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:54:50,945 INFO L280 TraceCheckUtils]: 0: Hoare triple {47#true} ~m := #in~m; {47#true} is VALID [2020-07-08 15:54:50,947 INFO L280 TraceCheckUtils]: 1: Hoare triple {47#true} ~n := #in~n; {60#(= ackermann_~n |ackermann_#in~n|)} is VALID [2020-07-08 15:54:50,948 INFO L280 TraceCheckUtils]: 2: Hoare triple {60#(= ackermann_~n |ackermann_#in~n|)} assume 0 == ~m; {60#(= ackermann_~n |ackermann_#in~n|)} is VALID [2020-07-08 15:54:50,950 INFO L280 TraceCheckUtils]: 3: Hoare triple {60#(= ackermann_~n |ackermann_#in~n|)} #res := 1 + ~n; {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} is VALID [2020-07-08 15:54:50,951 INFO L280 TraceCheckUtils]: 4: Hoare triple {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} assume true; {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} is VALID [2020-07-08 15:54:50,954 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} {51#(<= 0 main_~n~0)} #67#return; {58#(<= 1 |main_#t~ret5|)} is VALID [2020-07-08 15:54:50,955 INFO L263 TraceCheckUtils]: 0: Hoare triple {47#true} call ULTIMATE.init(); {47#true} is VALID [2020-07-08 15:54:50,956 INFO L280 TraceCheckUtils]: 1: Hoare triple {47#true} assume true; {47#true} is VALID [2020-07-08 15:54:50,956 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {47#true} {47#true} #57#return; {47#true} is VALID [2020-07-08 15:54:50,957 INFO L263 TraceCheckUtils]: 3: Hoare triple {47#true} call #t~ret6 := main(); {47#true} is VALID [2020-07-08 15:54:50,957 INFO L280 TraceCheckUtils]: 4: Hoare triple {47#true} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {47#true} is VALID [2020-07-08 15:54:50,958 INFO L280 TraceCheckUtils]: 5: Hoare triple {47#true} ~m~0 := #t~nondet3; {47#true} is VALID [2020-07-08 15:54:50,958 INFO L280 TraceCheckUtils]: 6: Hoare triple {47#true} havoc #t~nondet3; {47#true} is VALID [2020-07-08 15:54:50,959 INFO L280 TraceCheckUtils]: 7: Hoare triple {47#true} assume !(~m~0 < 0 || ~m~0 > 3); {47#true} is VALID [2020-07-08 15:54:50,959 INFO L280 TraceCheckUtils]: 8: Hoare triple {47#true} assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; {47#true} is VALID [2020-07-08 15:54:50,960 INFO L280 TraceCheckUtils]: 9: Hoare triple {47#true} ~n~0 := #t~nondet4; {47#true} is VALID [2020-07-08 15:54:50,960 INFO L280 TraceCheckUtils]: 10: Hoare triple {47#true} havoc #t~nondet4; {47#true} is VALID [2020-07-08 15:54:50,962 INFO L280 TraceCheckUtils]: 11: Hoare triple {47#true} assume !(~n~0 < 0 || ~n~0 > 23); {51#(<= 0 main_~n~0)} is VALID [2020-07-08 15:54:50,963 INFO L263 TraceCheckUtils]: 12: Hoare triple {51#(<= 0 main_~n~0)} call #t~ret5 := ackermann(~m~0, ~n~0); {47#true} is VALID [2020-07-08 15:54:50,963 INFO L280 TraceCheckUtils]: 13: Hoare triple {47#true} ~m := #in~m; {47#true} is VALID [2020-07-08 15:54:50,968 INFO L280 TraceCheckUtils]: 14: Hoare triple {47#true} ~n := #in~n; {60#(= ackermann_~n |ackermann_#in~n|)} is VALID [2020-07-08 15:54:50,969 INFO L280 TraceCheckUtils]: 15: Hoare triple {60#(= ackermann_~n |ackermann_#in~n|)} assume 0 == ~m; {60#(= ackermann_~n |ackermann_#in~n|)} is VALID [2020-07-08 15:54:50,970 INFO L280 TraceCheckUtils]: 16: Hoare triple {60#(= ackermann_~n |ackermann_#in~n|)} #res := 1 + ~n; {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} is VALID [2020-07-08 15:54:50,971 INFO L280 TraceCheckUtils]: 17: Hoare triple {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} assume true; {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} is VALID [2020-07-08 15:54:50,974 INFO L275 TraceCheckUtils]: 18: Hoare quadruple {61#(<= (+ |ackermann_#in~n| 1) |ackermann_#res|)} {51#(<= 0 main_~n~0)} #67#return; {58#(<= 1 |main_#t~ret5|)} is VALID [2020-07-08 15:54:50,975 INFO L280 TraceCheckUtils]: 19: Hoare triple {58#(<= 1 |main_#t~ret5|)} assume -2147483648 <= #t~ret5 && #t~ret5 <= 2147483647; {58#(<= 1 |main_#t~ret5|)} is VALID [2020-07-08 15:54:50,976 INFO L280 TraceCheckUtils]: 20: Hoare triple {58#(<= 1 |main_#t~ret5|)} ~result~0 := #t~ret5; {59#(<= 1 main_~result~0)} is VALID [2020-07-08 15:54:50,977 INFO L280 TraceCheckUtils]: 21: Hoare triple {59#(<= 1 main_~result~0)} havoc #t~ret5; {59#(<= 1 main_~result~0)} is VALID [2020-07-08 15:54:50,979 INFO L280 TraceCheckUtils]: 22: Hoare triple {59#(<= 1 main_~result~0)} assume !((~m~0 < 0 || ~n~0 < 0) || ~result~0 >= 0); {48#false} is VALID [2020-07-08 15:54:50,979 INFO L280 TraceCheckUtils]: 23: Hoare triple {48#false} assume !false; {48#false} is VALID [2020-07-08 15:54:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-08 15:54:50,983 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 15:54:50,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050471342] [2020-07-08 15:54:50,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 15:54:50,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-08 15:54:50,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149650459] [2020-07-08 15:54:50,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-08 15:54:50,999 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 15:54:51,004 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states. [2020-07-08 15:54:51,056 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:54:51,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-08 15:54:51,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 15:54:51,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-08 15:54:51,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-08 15:54:51,070 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-07-08 15:54:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:54:51,674 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-07-08 15:54:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-08 15:54:51,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-08 15:54:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 15:54:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-08 15:54:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2020-07-08 15:54:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-08 15:54:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2020-07-08 15:54:51,694 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states and 71 transitions. [2020-07-08 15:54:51,785 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 71 edges. 71 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:54:51,801 INFO L225 Difference]: With dead ends: 61 [2020-07-08 15:54:51,801 INFO L226 Difference]: Without dead ends: 39 [2020-07-08 15:54:51,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-07-08 15:54:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-08 15:54:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-08 15:54:51,883 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 15:54:51,883 INFO L82 GeneralOperation]: Start isEquivalent. First operand 39 states. Second operand 39 states. [2020-07-08 15:54:51,884 INFO L74 IsIncluded]: Start isIncluded. First operand 39 states. Second operand 39 states. [2020-07-08 15:54:51,884 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 39 states. [2020-07-08 15:54:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:54:51,893 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-08 15:54:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-07-08 15:54:51,895 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:54:51,895 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:54:51,895 INFO L74 IsIncluded]: Start isIncluded. First operand 39 states. Second operand 39 states. [2020-07-08 15:54:51,895 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 39 states. [2020-07-08 15:54:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:54:51,902 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-08 15:54:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-07-08 15:54:51,904 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:54:51,904 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:54:51,904 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 15:54:51,904 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 15:54:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-08 15:54:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-07-08 15:54:51,911 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2020-07-08 15:54:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 15:54:51,915 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-07-08 15:54:51,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-08 15:54:51,915 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 39 states and 45 transitions. [2020-07-08 15:54:51,979 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 45 edges. 45 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:54:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-07-08 15:54:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-08 15:54:51,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:54:51,982 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] [2020-07-08 15:54:51,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 15:54:51,983 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:54:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:54:51,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times [2020-07-08 15:54:51,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:54:51,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158193421] [2020-07-08 15:54:51,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-08 15:54:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:54:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:54:52,231 INFO L280 TraceCheckUtils]: 0: Hoare triple {350#true} assume true; {350#true} is VALID [2020-07-08 15:54:52,232 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {350#true} {350#true} #57#return; {350#true} is VALID [2020-07-08 15:54:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-08 15:54:52,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-08 15:54:52,242 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:396) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:239) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:108) 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:102) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:279) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-08 15:54:52,249 INFO L168 Benchmark]: Toolchain (without parser) took 2509.03 ms. Allocated memory was 134.7 MB in the beginning and 225.4 MB in the end (delta: 90.7 MB). Free memory was 99.9 MB in the beginning and 106.0 MB in the end (delta: -6.1 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2020-07-08 15:54:52,250 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 134.7 MB. Free memory was 118.2 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-08 15:54:52,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.01 ms. Allocated memory is still 134.7 MB. Free memory was 99.7 MB in the beginning and 89.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-08 15:54:52,252 INFO L168 Benchmark]: Boogie Preprocessor took 29.74 ms. Allocated memory is still 134.7 MB. Free memory was 89.9 MB in the beginning and 88.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-08 15:54:52,253 INFO L168 Benchmark]: RCFGBuilder took 491.27 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 88.4 MB in the beginning and 155.3 MB in the end (delta: -66.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-08 15:54:52,254 INFO L168 Benchmark]: TraceAbstraction took 1739.14 ms. Allocated memory was 199.2 MB in the beginning and 225.4 MB in the end (delta: 26.2 MB). Free memory was 155.3 MB in the beginning and 106.0 MB in the end (delta: 49.3 MB). Peak memory consumption was 75.5 MB. Max. memory is 7.1 GB. [2020-07-08 15:54:52,260 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 134.7 MB. Free memory was 118.2 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.01 ms. Allocated memory is still 134.7 MB. Free memory was 99.7 MB in the beginning and 89.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.74 ms. Allocated memory is still 134.7 MB. Free memory was 89.9 MB in the beginning and 88.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.27 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 88.4 MB in the beginning and 155.3 MB in the end (delta: -66.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1739.14 ms. Allocated memory was 199.2 MB in the beginning and 225.4 MB in the end (delta: 26.2 MB). Free memory was 155.3 MB in the beginning and 106.0 MB in the end (delta: 49.3 MB). Peak memory consumption was 75.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: has to be unsat by construction, we do check only for interpolant computation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: has to be unsat by construction, we do check only for interpolant computation: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:396) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...