/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/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-46f3038-m [2020-07-08 15:55:04,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 15:55:04,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 15:55:04,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 15:55:04,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 15:55:04,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 15:55:04,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 15:55:04,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 15:55:04,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 15:55:04,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 15:55:04,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 15:55:04,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 15:55:04,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 15:55:04,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 15:55:04,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 15:55:04,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 15:55:04,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 15:55:04,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 15:55:04,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 15:55:04,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 15:55:04,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 15:55:04,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 15:55:04,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 15:55:04,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 15:55:04,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-08 15:55:04,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 15:55:04,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 15:55:04,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 15:55:04,489 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 15:55:04,498 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 15:55:04,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 15:55:04,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 15:55:04,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 15:55:04,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 15:55:04,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 15:55:04,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 15:55:04,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 15:55:04,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 15:55:04,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 15:55:04,501 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 15:55:04,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 15:55:04,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 15:55:04,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 15:55:04,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 15:55:04,502 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 15:55:04,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 15:55:04,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 15:55:04,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 15:55:04,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 15:55:04,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 15:55:04,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 15:55:04,503 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-08 15:55:04,780 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 15:55:04,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 15:55:04,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 15:55:04,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 15:55:04,799 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 15:55:04,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-08 15:55:04,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cff4f6dd/aab259b0f044401fa1f07d9e8735fcb0/FLAG0c55c3ba7 [2020-07-08 15:55:05,311 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 15:55:05,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-07-08 15:55:05,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cff4f6dd/aab259b0f044401fa1f07d9e8735fcb0/FLAG0c55c3ba7 [2020-07-08 15:55:05,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cff4f6dd/aab259b0f044401fa1f07d9e8735fcb0 [2020-07-08 15:55:05,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 15:55:05,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 15:55:05,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 15:55:05,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 15:55:05,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 15:55:05,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ba5ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:05, skipping insertion in model container [2020-07-08 15:55:05,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:55:05" (1/1) ... [2020-07-08 15:55:05,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 15:55:05,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 15:55:06,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:55:06,018 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 15:55:06,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:55:06,056 INFO L208 MainTranslator]: Completed translation [2020-07-08 15:55:06,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06 WrapperNode [2020-07-08 15:55:06,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 15:55:06,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 15:55:06,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 15:55:06,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 15:55:06,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (1/1) ... [2020-07-08 15:55:06,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (1/1) ... [2020-07-08 15:55:06,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (1/1) ... [2020-07-08 15:55:06,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (1/1) ... [2020-07-08 15:55:06,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (1/1) ... [2020-07-08 15:55:06,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (1/1) ... [2020-07-08 15:55:06,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (1/1) ... [2020-07-08 15:55:06,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 15:55:06,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 15:55:06,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 15:55:06,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 15:55:06,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (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 15:55:06,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 15:55:06,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 15:55:06,251 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-08 15:55:06,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 15:55:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 15:55:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-08 15:55:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-08 15:55:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 15:55:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 15:55:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 15:55:06,581 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 15:55:06,582 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-08 15:55:06,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:55:06 BoogieIcfgContainer [2020-07-08 15:55:06,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 15:55:06,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 15:55:06,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 15:55:06,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 15:55:06,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 03:55:05" (1/3) ... [2020-07-08 15:55:06,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5689b9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:55:06, skipping insertion in model container [2020-07-08 15:55:06,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:06" (2/3) ... [2020-07-08 15:55:06,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5689b9e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:55:06, skipping insertion in model container [2020-07-08 15:55:06,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:55:06" (3/3) ... [2020-07-08 15:55:06,593 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-07-08 15:55:06,604 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 15:55:06,611 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 15:55:06,623 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 15:55:06,645 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 15:55:06,645 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 15:55:06,646 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-08 15:55:06,646 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 15:55:06,646 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 15:55:06,646 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 15:55:06,646 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 15:55:06,646 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 15:55:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-08 15:55:06,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-08 15:55:06,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:55:06,673 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 15:55:06,674 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:55:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:55:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash 607163649, now seen corresponding path program 1 times [2020-07-08 15:55:06,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:55:06,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120470220] [2020-07-08 15:55:06,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:55:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:06,950 INFO L280 TraceCheckUtils]: 0: Hoare triple {33#true} assume true; {33#true} is VALID [2020-07-08 15:55:06,952 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {33#true} {33#true} #39#return; {33#true} is VALID [2020-07-08 15:55:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:07,080 INFO L280 TraceCheckUtils]: 0: Hoare triple {33#true} ~n := #in~n; {44#(= hanoi_~n |hanoi_#in~n|)} is VALID [2020-07-08 15:55:07,082 INFO L280 TraceCheckUtils]: 1: Hoare triple {44#(= hanoi_~n |hanoi_#in~n|)} assume 1 == ~n; {45#(= 1 |hanoi_#in~n|)} is VALID [2020-07-08 15:55:07,083 INFO L280 TraceCheckUtils]: 2: Hoare triple {45#(= 1 |hanoi_#in~n|)} #res := 1; {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} is VALID [2020-07-08 15:55:07,085 INFO L280 TraceCheckUtils]: 3: Hoare triple {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} assume true; {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} is VALID [2020-07-08 15:55:07,088 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} {33#true} #43#return; {42#(<= main_~n~0 |main_#t~ret2|)} is VALID [2020-07-08 15:55:07,089 INFO L263 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {33#true} is VALID [2020-07-08 15:55:07,090 INFO L280 TraceCheckUtils]: 1: Hoare triple {33#true} assume true; {33#true} is VALID [2020-07-08 15:55:07,090 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {33#true} {33#true} #39#return; {33#true} is VALID [2020-07-08 15:55:07,091 INFO L263 TraceCheckUtils]: 3: Hoare triple {33#true} call #t~ret3 := main(); {33#true} is VALID [2020-07-08 15:55:07,091 INFO L280 TraceCheckUtils]: 4: Hoare triple {33#true} assume -2147483648 <= #t~nondet1 && #t~nondet1 <= 2147483647; {33#true} is VALID [2020-07-08 15:55:07,092 INFO L280 TraceCheckUtils]: 5: Hoare triple {33#true} ~n~0 := #t~nondet1; {33#true} is VALID [2020-07-08 15:55:07,092 INFO L280 TraceCheckUtils]: 6: Hoare triple {33#true} havoc #t~nondet1; {33#true} is VALID [2020-07-08 15:55:07,093 INFO L280 TraceCheckUtils]: 7: Hoare triple {33#true} assume !(~n~0 < 1 || ~n~0 > 31); {33#true} is VALID [2020-07-08 15:55:07,093 INFO L263 TraceCheckUtils]: 8: Hoare triple {33#true} call #t~ret2 := hanoi(~n~0); {33#true} is VALID [2020-07-08 15:55:07,095 INFO L280 TraceCheckUtils]: 9: Hoare triple {33#true} ~n := #in~n; {44#(= hanoi_~n |hanoi_#in~n|)} is VALID [2020-07-08 15:55:07,097 INFO L280 TraceCheckUtils]: 10: Hoare triple {44#(= hanoi_~n |hanoi_#in~n|)} assume 1 == ~n; {45#(= 1 |hanoi_#in~n|)} is VALID [2020-07-08 15:55:07,099 INFO L280 TraceCheckUtils]: 11: Hoare triple {45#(= 1 |hanoi_#in~n|)} #res := 1; {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} is VALID [2020-07-08 15:55:07,102 INFO L280 TraceCheckUtils]: 12: Hoare triple {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} assume true; {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} is VALID [2020-07-08 15:55:07,104 INFO L275 TraceCheckUtils]: 13: Hoare quadruple {46#(and (= 1 |hanoi_#in~n|) (= 1 |hanoi_#res|))} {33#true} #43#return; {42#(<= main_~n~0 |main_#t~ret2|)} is VALID [2020-07-08 15:55:07,106 INFO L280 TraceCheckUtils]: 14: Hoare triple {42#(<= main_~n~0 |main_#t~ret2|)} assume -2147483648 <= #t~ret2 && #t~ret2 <= 2147483647; {42#(<= main_~n~0 |main_#t~ret2|)} is VALID [2020-07-08 15:55:07,107 INFO L280 TraceCheckUtils]: 15: Hoare triple {42#(<= main_~n~0 |main_#t~ret2|)} ~result~0 := #t~ret2; {43#(<= main_~n~0 main_~result~0)} is VALID [2020-07-08 15:55:07,108 INFO L280 TraceCheckUtils]: 16: Hoare triple {43#(<= main_~n~0 main_~result~0)} havoc #t~ret2; {43#(<= main_~n~0 main_~result~0)} is VALID [2020-07-08 15:55:07,110 INFO L280 TraceCheckUtils]: 17: Hoare triple {43#(<= main_~n~0 main_~result~0)} assume !(~result~0 >= ~n~0); {34#false} is VALID [2020-07-08 15:55:07,110 INFO L280 TraceCheckUtils]: 18: Hoare triple {34#false} assume !false; {34#false} is VALID [2020-07-08 15:55:07,113 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 15:55:07,114 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 15:55:07,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120470220] [2020-07-08 15:55:07,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 15:55:07,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-08 15:55:07,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367256292] [2020-07-08 15:55:07,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-08 15:55:07,130 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 15:55:07,134 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states. [2020-07-08 15:55:07,172 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 15:55:07,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-08 15:55:07,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 15:55:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-08 15:55:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-08 15:55:07,188 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 7 states. [2020-07-08 15:55:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:07,617 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-08 15:55:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-08 15:55:07,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-08 15:55:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 15:55:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-08 15:55:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 48 transitions. [2020-07-08 15:55:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-08 15:55:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 48 transitions. [2020-07-08 15:55:07,645 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states and 48 transitions. [2020-07-08 15:55:07,727 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:07,740 INFO L225 Difference]: With dead ends: 44 [2020-07-08 15:55:07,740 INFO L226 Difference]: Without dead ends: 26 [2020-07-08 15:55:07,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-08 15:55:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-08 15:55:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-08 15:55:07,810 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 15:55:07,810 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:07,811 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:07,811 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:07,817 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-08 15:55:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-08 15:55:07,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:07,818 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:07,818 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:07,818 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 26 states. [2020-07-08 15:55:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:07,823 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-08 15:55:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-08 15:55:07,824 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:07,824 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:07,824 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 15:55:07,825 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 15:55:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-08 15:55:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-07-08 15:55:07,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-07-08 15:55:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 15:55:07,830 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-07-08 15:55:07,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-08 15:55:07,831 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 26 states and 27 transitions. [2020-07-08 15:55:07,868 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 15:55:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-08 15:55:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-08 15:55:07,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:55:07,871 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 15:55:07,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 15:55:07,871 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:55:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:55:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1887435767, now seen corresponding path program 1 times [2020-07-08 15:55:07,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:55:07,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571159703] [2020-07-08 15:55:07,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:55:07,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-08 15:55:07,924 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 15:55:07,930 INFO L168 Benchmark]: Toolchain (without parser) took 2214.11 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 103.1 MB in the beginning and 175.9 MB in the end (delta: -72.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:07,931 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-08 15:55:07,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.67 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:07,933 INFO L168 Benchmark]: Boogie Preprocessor took 33.10 ms. Allocated memory is still 138.9 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:07,934 INFO L168 Benchmark]: RCFGBuilder took 493.84 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 164.7 MB in the end (delta: -72.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:07,935 INFO L168 Benchmark]: TraceAbstraction took 1340.59 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 164.0 MB in the beginning and 175.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:07,939 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 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.67 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.10 ms. Allocated memory is still 138.9 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 493.84 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 164.7 MB in the end (delta: -72.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1340.59 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 164.0 MB in the beginning and 175.9 MB in the end (delta: -11.9 MB). Peak memory consumption was 19.6 MB. 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...