/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-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-46f3038-m [2020-07-08 16:02:41,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 16:02:41,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 16:02:41,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 16:02:41,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 16:02:41,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 16:02:41,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 16:02:41,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 16:02:41,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 16:02:41,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 16:02:41,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 16:02:41,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 16:02:41,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 16:02:41,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 16:02:41,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 16:02:41,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 16:02:41,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 16:02:41,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 16:02:41,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 16:02:41,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 16:02:41,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 16:02:41,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 16:02:41,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 16:02:41,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 16:02:41,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-08 16:02:41,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 16:02:41,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 16:02:41,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 16:02:41,471 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 16:02:41,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 16:02:41,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 16:02:41,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 16:02:41,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 16:02:41,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 16:02:41,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 16:02:41,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 16:02:41,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 16:02:41,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 16:02:41,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 16:02:41,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 16:02:41,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 16:02:41,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 16:02:41,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 16:02:41,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 16:02:41,485 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 16:02:41,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 16:02:41,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 16:02:41,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 16:02:41,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 16:02:41,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 16:02:41,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 16:02:41,486 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-08 16:02:41,843 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 16:02:41,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 16:02:41,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 16:02:41,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 16:02:41,867 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 16:02:41,868 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-08 16:02:41,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce632276/089a1f99ccec458183e6eadc72e6b649/FLAGc252080ad [2020-07-08 16:02:42,443 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 16:02:42,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-08 16:02:42,452 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce632276/089a1f99ccec458183e6eadc72e6b649/FLAGc252080ad [2020-07-08 16:02:42,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce632276/089a1f99ccec458183e6eadc72e6b649 [2020-07-08 16:02:42,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 16:02:42,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 16:02:42,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 16:02:42,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 16:02:42,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 16:02:42,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 04:02:42" (1/1) ... [2020-07-08 16:02:42,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165717ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:42, skipping insertion in model container [2020-07-08 16:02:42,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 04:02:42" (1/1) ... [2020-07-08 16:02:42,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 16:02:42,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 16:02:43,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 16:02:43,054 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 16:02:43,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 16:02:43,087 INFO L208 MainTranslator]: Completed translation [2020-07-08 16:02:43,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43 WrapperNode [2020-07-08 16:02:43,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 16:02:43,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 16:02:43,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 16:02:43,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 16:02:43,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (1/1) ... [2020-07-08 16:02:43,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (1/1) ... [2020-07-08 16:02:43,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (1/1) ... [2020-07-08 16:02:43,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (1/1) ... [2020-07-08 16:02:43,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (1/1) ... [2020-07-08 16:02:43,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (1/1) ... [2020-07-08 16:02:43,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (1/1) ... [2020-07-08 16:02:43,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 16:02:43,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 16:02:43,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 16:02:43,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 16:02:43,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (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 16:02:43,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 16:02:43,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 16:02:43,270 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-08 16:02:43,270 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 16:02:43,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-08 16:02:43,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 16:02:43,270 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-08 16:02:43,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 16:02:43,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 16:02:43,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 16:02:43,511 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 16:02:43,511 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-08 16:02:43,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 04:02:43 BoogieIcfgContainer [2020-07-08 16:02:43,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 16:02:43,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 16:02:43,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 16:02:43,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 16:02:43,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 04:02:42" (1/3) ... [2020-07-08 16:02:43,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a458290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 04:02:43, skipping insertion in model container [2020-07-08 16:02:43,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 04:02:43" (2/3) ... [2020-07-08 16:02:43,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a458290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 04:02:43, skipping insertion in model container [2020-07-08 16:02:43,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 04:02:43" (3/3) ... [2020-07-08 16:02:43,537 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-07-08 16:02:43,553 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 16:02:43,587 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 16:02:43,630 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 16:02:43,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 16:02:43,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 16:02:43,666 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-08 16:02:43,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 16:02:43,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 16:02:43,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 16:02:43,666 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 16:02:43,666 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 16:02:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-08 16:02:43,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-08 16:02:43,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 16:02:43,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-08 16:02:43,696 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 16:02:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 16:02:43,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-07-08 16:02:43,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 16:02:43,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842495493] [2020-07-08 16:02:43,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 16:02:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 16:02:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 16:02:43,911 INFO L280 TraceCheckUtils]: 0: Hoare triple {28#true} assume true; {28#true} is VALID [2020-07-08 16:02:43,912 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {28#true} {28#true} #31#return; {28#true} is VALID [2020-07-08 16:02:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 16:02:43,969 INFO L280 TraceCheckUtils]: 0: Hoare triple {28#true} ~x := #in~x; {38#(= |id_#in~x| id_~x)} is VALID [2020-07-08 16:02:43,970 INFO L280 TraceCheckUtils]: 1: Hoare triple {38#(= |id_#in~x| id_~x)} assume 0 == ~x; {39#(= 0 |id_#in~x|)} is VALID [2020-07-08 16:02:43,971 INFO L280 TraceCheckUtils]: 2: Hoare triple {39#(= 0 |id_#in~x|)} #res := 0; {39#(= 0 |id_#in~x|)} is VALID [2020-07-08 16:02:43,972 INFO L280 TraceCheckUtils]: 3: Hoare triple {39#(= 0 |id_#in~x|)} assume true; {39#(= 0 |id_#in~x|)} is VALID [2020-07-08 16:02:43,975 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {39#(= 0 |id_#in~x|)} {32#(<= 25 main_~input~0)} #35#return; {29#false} is VALID [2020-07-08 16:02:43,976 INFO L263 TraceCheckUtils]: 0: Hoare triple {28#true} call ULTIMATE.init(); {28#true} is VALID [2020-07-08 16:02:43,976 INFO L280 TraceCheckUtils]: 1: Hoare triple {28#true} assume true; {28#true} is VALID [2020-07-08 16:02:43,976 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {28#true} {28#true} #31#return; {28#true} is VALID [2020-07-08 16:02:43,977 INFO L263 TraceCheckUtils]: 3: Hoare triple {28#true} call #t~ret2 := main(); {28#true} is VALID [2020-07-08 16:02:43,978 INFO L280 TraceCheckUtils]: 4: Hoare triple {28#true} ~input~0 := 25; {32#(<= 25 main_~input~0)} is VALID [2020-07-08 16:02:43,979 INFO L263 TraceCheckUtils]: 5: Hoare triple {32#(<= 25 main_~input~0)} call #t~ret1 := id(~input~0); {28#true} is VALID [2020-07-08 16:02:43,980 INFO L280 TraceCheckUtils]: 6: Hoare triple {28#true} ~x := #in~x; {38#(= |id_#in~x| id_~x)} is VALID [2020-07-08 16:02:43,981 INFO L280 TraceCheckUtils]: 7: Hoare triple {38#(= |id_#in~x| id_~x)} assume 0 == ~x; {39#(= 0 |id_#in~x|)} is VALID [2020-07-08 16:02:43,982 INFO L280 TraceCheckUtils]: 8: Hoare triple {39#(= 0 |id_#in~x|)} #res := 0; {39#(= 0 |id_#in~x|)} is VALID [2020-07-08 16:02:43,983 INFO L280 TraceCheckUtils]: 9: Hoare triple {39#(= 0 |id_#in~x|)} assume true; {39#(= 0 |id_#in~x|)} is VALID [2020-07-08 16:02:43,985 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {39#(= 0 |id_#in~x|)} {32#(<= 25 main_~input~0)} #35#return; {29#false} is VALID [2020-07-08 16:02:43,986 INFO L280 TraceCheckUtils]: 11: Hoare triple {29#false} assume -2147483648 <= #t~ret1 && #t~ret1 <= 2147483647; {29#false} is VALID [2020-07-08 16:02:43,986 INFO L280 TraceCheckUtils]: 12: Hoare triple {29#false} ~result~0 := #t~ret1; {29#false} is VALID [2020-07-08 16:02:43,986 INFO L280 TraceCheckUtils]: 13: Hoare triple {29#false} havoc #t~ret1; {29#false} is VALID [2020-07-08 16:02:43,987 INFO L280 TraceCheckUtils]: 14: Hoare triple {29#false} assume 25 == ~result~0; {29#false} is VALID [2020-07-08 16:02:43,987 INFO L280 TraceCheckUtils]: 15: Hoare triple {29#false} assume !false; {29#false} is VALID [2020-07-08 16:02:43,989 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 16:02:43,990 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 16:02:43,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842495493] [2020-07-08 16:02:43,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 16:02:43,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-08 16:02:43,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542171442] [2020-07-08 16:02:44,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-08 16:02:44,004 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 16:02:44,007 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-08 16:02:44,058 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 16:02:44,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-08 16:02:44,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 16:02:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-08 16:02:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-08 16:02:44,075 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-08 16:02:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 16:02:44,341 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-08 16:02:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-08 16:02:44,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-08 16:02:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 16:02:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 16:02:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2020-07-08 16:02:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 16:02:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2020-07-08 16:02:44,359 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 40 transitions. [2020-07-08 16:02:44,436 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 16:02:44,449 INFO L225 Difference]: With dead ends: 37 [2020-07-08 16:02:44,450 INFO L226 Difference]: Without dead ends: 23 [2020-07-08 16:02:44,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-08 16:02:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-08 16:02:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-08 16:02:44,534 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 16:02:44,535 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand 23 states. [2020-07-08 16:02:44,536 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-08 16:02:44,536 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-08 16:02:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 16:02:44,542 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-08 16:02:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-08 16:02:44,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 16:02:44,543 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 16:02:44,544 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-08 16:02:44,544 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-08 16:02:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 16:02:44,549 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-08 16:02:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-08 16:02:44,550 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 16:02:44,551 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 16:02:44,551 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 16:02:44,551 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 16:02:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-08 16:02:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-08 16:02:44,557 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-07-08 16:02:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 16:02:44,558 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-08 16:02:44,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-08 16:02:44,558 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 23 states and 24 transitions. [2020-07-08 16:02:44,603 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 16:02:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-08 16:02:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-08 16:02:44,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 16:02:44,605 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] [2020-07-08 16:02:44,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 16:02:44,606 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 16:02:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 16:02:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-07-08 16:02:44,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 16:02:44,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385116390] [2020-07-08 16:02:44,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY