/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/recHanoi02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-46f3038-m [2020-07-08 15:55:03,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 15:55:03,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 15:55:03,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 15:55:03,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 15:55:03,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 15:55:03,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 15:55:03,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 15:55:03,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 15:55:03,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 15:55:03,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 15:55:03,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 15:55:03,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 15:55:03,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 15:55:03,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 15:55:03,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 15:55:03,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 15:55:03,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 15:55:03,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 15:55:03,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 15:55:03,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 15:55:03,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 15:55:03,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 15:55:03,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 15:55:03,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-08 15:55:03,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-08 15:55:03,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-08 15:55:03,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-08 15:55:03,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-08 15:55:03,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-08 15:55:03,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-08 15:55:03,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-08 15:55:03,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-08 15:55:03,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-08 15:55:03,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-08 15:55:03,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-08 15:55:03,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-08 15:55:03,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-08 15:55:03,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 15:55:03,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 15:55:03,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 15:55:03,621 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 15:55:03,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 15:55:03,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 15:55:03,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 15:55:03,631 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 15:55:03,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 15:55:03,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 15:55:03,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 15:55:03,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 15:55:03,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 15:55:03,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 15:55:03,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 15:55:03,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 15:55:03,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 15:55:03,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 15:55:03,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 15:55:03,634 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 15:55:03,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 15:55:03,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 15:55:03,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 15:55:03,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 15:55:03,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 15:55:03,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 15:55:03,635 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-08 15:55:03,922 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 15:55:03,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 15:55:03,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 15:55:03,941 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 15:55:03,942 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 15:55:03,942 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-08 15:55:04,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/894a1c279/c2d5ed0c328a4345adb7e46a66ae8be1/FLAGbf62bb444 [2020-07-08 15:55:04,426 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 15:55:04,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi02-2.c [2020-07-08 15:55:04,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/894a1c279/c2d5ed0c328a4345adb7e46a66ae8be1/FLAGbf62bb444 [2020-07-08 15:55:04,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/894a1c279/c2d5ed0c328a4345adb7e46a66ae8be1 [2020-07-08 15:55:04,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 15:55:04,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 15:55:04,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 15:55:04,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 15:55:04,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 15:55:04,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:55:04" (1/1) ... [2020-07-08 15:55:04,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7caa8c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:04, skipping insertion in model container [2020-07-08 15:55:04,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:55:04" (1/1) ... [2020-07-08 15:55:04,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 15:55:04,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 15:55:05,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:55:05,050 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 15:55:05,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:55:05,081 INFO L208 MainTranslator]: Completed translation [2020-07-08 15:55:05,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05 WrapperNode [2020-07-08 15:55:05,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 15:55:05,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 15:55:05,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 15:55:05,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 15:55:05,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 15:55:05,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 15:55:05,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 15:55:05,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 15:55:05,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (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 15:55:05,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 15:55:05,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 15:55:05,277 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-08 15:55:05,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 15:55:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 15:55:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-08 15:55:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-08 15:55:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 15:55:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 15:55:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 15:55:05,655 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 15:55:05,655 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-08 15:55:05,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:55:05 BoogieIcfgContainer [2020-07-08 15:55:05,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 15:55:05,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 15:55:05,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 15:55:05,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 15:55:05,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 03:55:04" (1/3) ... [2020-07-08 15:55:05,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbd68b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:55:05, skipping insertion in model container [2020-07-08 15:55:05,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05" (2/3) ... [2020-07-08 15:55:05,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbd68b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:55:05, skipping insertion in model container [2020-07-08 15:55:05,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:55:05" (3/3) ... [2020-07-08 15:55:05,668 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi02-2.c [2020-07-08 15:55:05,679 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 15:55:05,688 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 15:55:05,704 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 15:55:05,728 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 15:55:05,728 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 15:55:05,728 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-08 15:55:05,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 15:55:05,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 15:55:05,728 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 15:55:05,729 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 15:55:05,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 15:55:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-08 15:55:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-08 15:55:05,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:55:05,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-08 15:55:05,758 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:55:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:55:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash 607163649, now seen corresponding path program 1 times [2020-07-08 15:55:05,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:55:05,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569062232] [2020-07-08 15:55:05,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:55:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:06,068 INFO L280 TraceCheckUtils]: 0: Hoare triple {33#true} assume true; {33#true} is VALID [2020-07-08 15:55:06,068 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {33#true} {33#true} #39#return; {33#true} is VALID [2020-07-08 15:55:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:06,109 INFO L280 TraceCheckUtils]: 0: Hoare triple {33#true} ~n := #in~n; {33#true} is VALID [2020-07-08 15:55:06,109 INFO L280 TraceCheckUtils]: 1: Hoare triple {33#true} assume 1 == ~n; {33#true} is VALID [2020-07-08 15:55:06,111 INFO L280 TraceCheckUtils]: 2: Hoare triple {33#true} #res := 1; {44#(= 1 |hanoi_#res|)} is VALID [2020-07-08 15:55:06,112 INFO L280 TraceCheckUtils]: 3: Hoare triple {44#(= 1 |hanoi_#res|)} assume true; {44#(= 1 |hanoi_#res|)} is VALID [2020-07-08 15:55:06,114 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {44#(= 1 |hanoi_#res|)} {33#true} #43#return; {42#(<= 1 |main_#t~ret2|)} is VALID [2020-07-08 15:55:06,115 INFO L263 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {33#true} is VALID [2020-07-08 15:55:06,115 INFO L280 TraceCheckUtils]: 1: Hoare triple {33#true} assume true; {33#true} is VALID [2020-07-08 15:55:06,116 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {33#true} {33#true} #39#return; {33#true} is VALID [2020-07-08 15:55:06,116 INFO L263 TraceCheckUtils]: 3: Hoare triple {33#true} call #t~ret3 := main(); {33#true} is VALID [2020-07-08 15:55:06,116 INFO L280 TraceCheckUtils]: 4: Hoare triple {33#true} assume -2147483648 <= #t~nondet1 && #t~nondet1 <= 2147483647; {33#true} is VALID [2020-07-08 15:55:06,117 INFO L280 TraceCheckUtils]: 5: Hoare triple {33#true} ~n~0 := #t~nondet1; {33#true} is VALID [2020-07-08 15:55:06,117 INFO L280 TraceCheckUtils]: 6: Hoare triple {33#true} havoc #t~nondet1; {33#true} is VALID [2020-07-08 15:55:06,118 INFO L280 TraceCheckUtils]: 7: Hoare triple {33#true} assume !(~n~0 < 1 || ~n~0 > 31); {33#true} is VALID [2020-07-08 15:55:06,118 INFO L263 TraceCheckUtils]: 8: Hoare triple {33#true} call #t~ret2 := hanoi(~n~0); {33#true} is VALID [2020-07-08 15:55:06,119 INFO L280 TraceCheckUtils]: 9: Hoare triple {33#true} ~n := #in~n; {33#true} is VALID [2020-07-08 15:55:06,120 INFO L280 TraceCheckUtils]: 10: Hoare triple {33#true} assume 1 == ~n; {33#true} is VALID [2020-07-08 15:55:06,121 INFO L280 TraceCheckUtils]: 11: Hoare triple {33#true} #res := 1; {44#(= 1 |hanoi_#res|)} is VALID [2020-07-08 15:55:06,122 INFO L280 TraceCheckUtils]: 12: Hoare triple {44#(= 1 |hanoi_#res|)} assume true; {44#(= 1 |hanoi_#res|)} is VALID [2020-07-08 15:55:06,124 INFO L275 TraceCheckUtils]: 13: Hoare quadruple {44#(= 1 |hanoi_#res|)} {33#true} #43#return; {42#(<= 1 |main_#t~ret2|)} is VALID [2020-07-08 15:55:06,125 INFO L280 TraceCheckUtils]: 14: Hoare triple {42#(<= 1 |main_#t~ret2|)} assume -2147483648 <= #t~ret2 && #t~ret2 <= 2147483647; {42#(<= 1 |main_#t~ret2|)} is VALID [2020-07-08 15:55:06,126 INFO L280 TraceCheckUtils]: 15: Hoare triple {42#(<= 1 |main_#t~ret2|)} ~result~0 := #t~ret2; {43#(<= 1 main_~result~0)} is VALID [2020-07-08 15:55:06,127 INFO L280 TraceCheckUtils]: 16: Hoare triple {43#(<= 1 main_~result~0)} havoc #t~ret2; {43#(<= 1 main_~result~0)} is VALID [2020-07-08 15:55:06,129 INFO L280 TraceCheckUtils]: 17: Hoare triple {43#(<= 1 main_~result~0)} assume !(~result~0 >= 0); {34#false} is VALID [2020-07-08 15:55:06,129 INFO L280 TraceCheckUtils]: 18: Hoare triple {34#false} assume !false; {34#false} is VALID [2020-07-08 15:55:06,132 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 15:55:06,133 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 15:55:06,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569062232] [2020-07-08 15:55:06,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 15:55:06,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-08 15:55:06,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744253522] [2020-07-08 15:55:06,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-08 15:55:06,149 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 15:55:06,153 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-08 15:55:06,191 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:06,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-08 15:55:06,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 15:55:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-08 15:55:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-08 15:55:06,204 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-07-08 15:55:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:06,591 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-07-08 15:55:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-08 15:55:06,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-08 15:55:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 15:55:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 15:55:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 49 transitions. [2020-07-08 15:55:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 15:55:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 49 transitions. [2020-07-08 15:55:06,611 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 49 transitions. [2020-07-08 15:55:06,694 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 49 edges. 49 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:06,707 INFO L225 Difference]: With dead ends: 45 [2020-07-08 15:55:06,707 INFO L226 Difference]: Without dead ends: 26 [2020-07-08 15:55:06,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-08 15:55:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-08 15:55:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-08 15:55:06,814 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 15:55:06,818 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:06,819 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:06,819 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:06,831 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-08 15:55:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-08 15:55:06,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:06,837 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:06,838 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:06,838 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:06,848 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-08 15:55:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-08 15:55:06,849 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:06,849 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:06,850 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 15:55:06,850 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 15:55:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-08 15:55:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-07-08 15:55:06,859 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-07-08 15:55:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 15:55:06,860 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-07-08 15:55:06,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-08 15:55:06,860 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 26 states and 27 transitions. [2020-07-08 15:55:06,924 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-08 15:55:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-08 15:55:06,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:55:06,927 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-08 15:55:06,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 15:55:06,928 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:55:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:55:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1887435767, now seen corresponding path program 1 times [2020-07-08 15:55:06,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:55:06,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220215203] [2020-07-08 15:55:06,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:55:06,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-08 15:55:06,980 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-08 15:55:06,986 INFO L168 Benchmark]: Toolchain (without parser) took 2135.77 ms. Allocated memory was 145.8 MB in the beginning and 235.4 MB in the end (delta: 89.7 MB). Free memory was 102.4 MB in the beginning and 198.9 MB in the end (delta: -96.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-08 15:55:06,987 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-08 15:55:06,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.81 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:06,988 INFO L168 Benchmark]: Boogie Preprocessor took 27.83 ms. Allocated memory is still 145.8 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:06,989 INFO L168 Benchmark]: RCFGBuilder took 548.86 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 91.3 MB in the beginning and 166.7 MB in the end (delta: -75.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:06,990 INFO L168 Benchmark]: TraceAbstraction took 1322.59 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 166.0 MB in the beginning and 198.9 MB in the end (delta: -32.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-08 15:55:06,995 INFO L336 ainManager$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 0.20 ms. Allocated memory is still 145.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.81 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.83 ms. Allocated memory is still 145.8 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.86 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 91.3 MB in the beginning and 166.7 MB in the end (delta: -75.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1322.59 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 166.0 MB in the beginning and 198.9 MB in the end (delta: -32.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...