/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/afterrec_2calls-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 18:36:24,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 18:36:24,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 18:36:24,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 18:36:24,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 18:36:24,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 18:36:24,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 18:36:24,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 18:36:24,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 18:36:24,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 18:36:24,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 18:36:24,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 18:36:24,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 18:36:24,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 18:36:24,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 18:36:24,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 18:36:24,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 18:36:24,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 18:36:24,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 18:36:24,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 18:36:24,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 18:36:24,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 18:36:24,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 18:36:24,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 18:36:24,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 18:36:24,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 18:36:24,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 18:36:24,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 18:36:24,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-10 18:36:24,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 18:36:24,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 18:36:24,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 18:36:24,656 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 18:36:24,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 18:36:24,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 18:36:24,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 18:36:24,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 18:36:24,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 18:36:24,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 18:36:24,658 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 18:36:24,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 18:36:24,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 18:36:24,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 18:36:24,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 18:36:24,659 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 18:36:24,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 18:36:24,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 18:36:24,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 18:36:24,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 18:36:24,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 18:36:24,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 18:36:24,660 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 18:36:24,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 18:36:24,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 18:36:24,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 18:36:24,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 18:36:24,978 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 18:36:24,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-07-10 18:36:25,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db46e2c64/c87b4b6c73c74770b58c337d462512a4/FLAG9f248c1e5 [2020-07-10 18:36:25,502 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 18:36:25,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-07-10 18:36:25,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db46e2c64/c87b4b6c73c74770b58c337d462512a4/FLAG9f248c1e5 [2020-07-10 18:36:25,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db46e2c64/c87b4b6c73c74770b58c337d462512a4 [2020-07-10 18:36:25,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 18:36:25,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 18:36:25,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 18:36:25,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 18:36:25,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 18:36:25,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:36:25" (1/1) ... [2020-07-10 18:36:25,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53aa5046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:25, skipping insertion in model container [2020-07-10 18:36:25,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:36:25" (1/1) ... [2020-07-10 18:36:25,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 18:36:25,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 18:36:26,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:36:26,089 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 18:36:26,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:36:26,127 INFO L208 MainTranslator]: Completed translation [2020-07-10 18:36:26,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26 WrapperNode [2020-07-10 18:36:26,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 18:36:26,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 18:36:26,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 18:36:26,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 18:36:26,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (1/1) ... [2020-07-10 18:36:26,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (1/1) ... [2020-07-10 18:36:26,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (1/1) ... [2020-07-10 18:36:26,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (1/1) ... [2020-07-10 18:36:26,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (1/1) ... [2020-07-10 18:36:26,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (1/1) ... [2020-07-10 18:36:26,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (1/1) ... [2020-07-10 18:36:26,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 18:36:26,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 18:36:26,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 18:36:26,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 18:36:26,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (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 [2020-07-10 18:36:26,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 18:36:26,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 18:36:26,320 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-10 18:36:26,320 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2020-07-10 18:36:26,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 18:36:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 18:36:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-10 18:36:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2020-07-10 18:36:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 18:36:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 18:36:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 18:36:26,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 18:36:26,608 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 18:36:26,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:36:26 BoogieIcfgContainer [2020-07-10 18:36:26,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 18:36:26,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 18:36:26,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 18:36:26,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 18:36:26,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 06:36:25" (1/3) ... [2020-07-10 18:36:26,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e613ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:36:26, skipping insertion in model container [2020-07-10 18:36:26,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:26" (2/3) ... [2020-07-10 18:36:26,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e613ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:36:26, skipping insertion in model container [2020-07-10 18:36:26,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:36:26" (3/3) ... [2020-07-10 18:36:26,644 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2020-07-10 18:36:26,656 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 18:36:26,664 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-10 18:36:26,679 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-10 18:36:26,702 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 18:36:26,702 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 18:36:26,702 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 18:36:26,703 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 18:36:26,703 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 18:36:26,703 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 18:36:26,703 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 18:36:26,703 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 18:36:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-10 18:36:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 18:36:26,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:36:26,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:36:26,732 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:36:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:36:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1612791331, now seen corresponding path program 1 times [2020-07-10 18:36:26,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:36:26,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591527250] [2020-07-10 18:36:26,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:36:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:27,014 INFO L280 TraceCheckUtils]: 0: Hoare triple {32#true} assume true; {32#true} is VALID [2020-07-10 18:36:27,015 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {32#true} {32#true} #35#return; {32#true} is VALID [2020-07-10 18:36:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:27,080 INFO L280 TraceCheckUtils]: 0: Hoare triple {32#true} ~n := #in~n; {44#(= f2_~n |f2_#in~n|)} is VALID [2020-07-10 18:36:27,081 INFO L280 TraceCheckUtils]: 1: Hoare triple {44#(= f2_~n |f2_#in~n|)} assume ~n < 3; {45#(<= |f2_#in~n| 2)} is VALID [2020-07-10 18:36:27,083 INFO L280 TraceCheckUtils]: 2: Hoare triple {45#(<= |f2_#in~n| 2)} assume true; {45#(<= |f2_#in~n| 2)} is VALID [2020-07-10 18:36:27,084 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {45#(<= |f2_#in~n| 2)} {39#(<= 3 f_~n)} #33#return; {33#false} is VALID [2020-07-10 18:36:27,085 INFO L263 TraceCheckUtils]: 0: Hoare triple {32#true} call ULTIMATE.init(); {32#true} is VALID [2020-07-10 18:36:27,086 INFO L280 TraceCheckUtils]: 1: Hoare triple {32#true} assume true; {32#true} is VALID [2020-07-10 18:36:27,086 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {32#true} {32#true} #35#return; {32#true} is VALID [2020-07-10 18:36:27,087 INFO L263 TraceCheckUtils]: 3: Hoare triple {32#true} call #t~ret4 := main(); {32#true} is VALID [2020-07-10 18:36:27,088 INFO L263 TraceCheckUtils]: 4: Hoare triple {32#true} call f(4); {36#(<= 4 |f_#in~n|)} is VALID [2020-07-10 18:36:27,089 INFO L280 TraceCheckUtils]: 5: Hoare triple {36#(<= 4 |f_#in~n|)} ~n := #in~n; {37#(<= 4 f_~n)} is VALID [2020-07-10 18:36:27,091 INFO L280 TraceCheckUtils]: 6: Hoare triple {37#(<= 4 f_~n)} assume !(~n < 3); {37#(<= 4 f_~n)} is VALID [2020-07-10 18:36:27,092 INFO L280 TraceCheckUtils]: 7: Hoare triple {37#(<= 4 f_~n)} #t~post2 := ~n; {38#(<= 4 |f_#t~post2|)} is VALID [2020-07-10 18:36:27,093 INFO L280 TraceCheckUtils]: 8: Hoare triple {38#(<= 4 |f_#t~post2|)} ~n := #t~post2 - 1; {39#(<= 3 f_~n)} is VALID [2020-07-10 18:36:27,094 INFO L280 TraceCheckUtils]: 9: Hoare triple {39#(<= 3 f_~n)} havoc #t~post2; {39#(<= 3 f_~n)} is VALID [2020-07-10 18:36:27,095 INFO L263 TraceCheckUtils]: 10: Hoare triple {39#(<= 3 f_~n)} call f2(~n); {32#true} is VALID [2020-07-10 18:36:27,096 INFO L280 TraceCheckUtils]: 11: Hoare triple {32#true} ~n := #in~n; {44#(= f2_~n |f2_#in~n|)} is VALID [2020-07-10 18:36:27,098 INFO L280 TraceCheckUtils]: 12: Hoare triple {44#(= f2_~n |f2_#in~n|)} assume ~n < 3; {45#(<= |f2_#in~n| 2)} is VALID [2020-07-10 18:36:27,100 INFO L280 TraceCheckUtils]: 13: Hoare triple {45#(<= |f2_#in~n| 2)} assume true; {45#(<= |f2_#in~n| 2)} is VALID [2020-07-10 18:36:27,101 INFO L275 TraceCheckUtils]: 14: Hoare quadruple {45#(<= |f2_#in~n| 2)} {39#(<= 3 f_~n)} #33#return; {33#false} is VALID [2020-07-10 18:36:27,102 INFO L280 TraceCheckUtils]: 15: Hoare triple {33#false} assume !false; {33#false} is VALID [2020-07-10 18:36:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 18:36:27,104 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:36:27,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591527250] [2020-07-10 18:36:27,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:36:27,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-10 18:36:27,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999643805] [2020-07-10 18:36:27,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-10 18:36:27,119 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:36:27,123 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2020-07-10 18:36:27,157 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:27,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-10 18:36:27,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:36:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-10 18:36:27,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-10 18:36:27,171 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-07-10 18:36:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:27,616 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-07-10 18:36:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-10 18:36:27,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-07-10 18:36:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:36:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-10 18:36:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 48 transitions. [2020-07-10 18:36:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-10 18:36:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 48 transitions. [2020-07-10 18:36:27,637 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 10 states and 48 transitions. [2020-07-10 18:36:27,706 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:27,718 INFO L225 Difference]: With dead ends: 43 [2020-07-10 18:36:27,718 INFO L226 Difference]: Without dead ends: 31 [2020-07-10 18:36:27,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-10 18:36:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-10 18:36:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-10 18:36:27,791 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:36:27,792 INFO L82 GeneralOperation]: Start isEquivalent. First operand 31 states. Second operand 31 states. [2020-07-10 18:36:27,792 INFO L74 IsIncluded]: Start isIncluded. First operand 31 states. Second operand 31 states. [2020-07-10 18:36:27,793 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 31 states. [2020-07-10 18:36:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:27,799 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-10 18:36:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-07-10 18:36:27,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:27,800 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:27,800 INFO L74 IsIncluded]: Start isIncluded. First operand 31 states. Second operand 31 states. [2020-07-10 18:36:27,800 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 31 states. [2020-07-10 18:36:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:27,806 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-10 18:36:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-07-10 18:36:27,806 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:27,807 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:27,807 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:36:27,807 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:36:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-10 18:36:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-07-10 18:36:27,813 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 16 [2020-07-10 18:36:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:36:27,813 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-07-10 18:36:27,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-10 18:36:27,813 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 31 states and 31 transitions. [2020-07-10 18:36:27,850 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-07-10 18:36:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-10 18:36:27,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:36:27,852 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:36:27,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 18:36:27,852 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:36:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:36:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash 107301256, now seen corresponding path program 1 times [2020-07-10 18:36:27,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:36:27,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146298731] [2020-07-10 18:36:27,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 Garbage collection #2: 23 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 23 to 43 Garbage collection #3: 43 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 43 to 83 [2020-07-10 18:36:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 18:36:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 18:36:27,995 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:36:27,995 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-10 18:36:27,996 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-10 18:36:27,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 18:36:28,010 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-10 18:36:28,010 WARN L170 areAnnotationChecker]: fENTRY has no Hoare annotation [2020-07-10 18:36:28,010 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 18:36:28,010 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 18:36:28,011 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-10 18:36:28,011 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-10 18:36:28,011 WARN L170 areAnnotationChecker]: f2ENTRY has no Hoare annotation [2020-07-10 18:36:28,011 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-10 18:36:28,011 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2020-07-10 18:36:28,011 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2020-07-10 18:36:28,012 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 18:36:28,012 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 18:36:28,012 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-10 18:36:28,012 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2020-07-10 18:36:28,012 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2020-07-10 18:36:28,012 WARN L170 areAnnotationChecker]: fFINAL has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: f2FINAL has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: L15 has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: fEXIT has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: fEXIT has no Hoare annotation [2020-07-10 18:36:28,013 WARN L170 areAnnotationChecker]: L8-1 has no Hoare annotation [2020-07-10 18:36:28,014 WARN L170 areAnnotationChecker]: f2EXIT has no Hoare annotation [2020-07-10 18:36:28,014 WARN L170 areAnnotationChecker]: L15-1 has no Hoare annotation [2020-07-10 18:36:28,014 WARN L170 areAnnotationChecker]: L16-1 has no Hoare annotation [2020-07-10 18:36:28,014 WARN L170 areAnnotationChecker]: L16-1 has no Hoare annotation [2020-07-10 18:36:28,014 WARN L170 areAnnotationChecker]: L8-2 has no Hoare annotation [2020-07-10 18:36:28,014 WARN L170 areAnnotationChecker]: L9-1 has no Hoare annotation [2020-07-10 18:36:28,015 WARN L170 areAnnotationChecker]: L9-1 has no Hoare annotation [2020-07-10 18:36:28,015 WARN L170 areAnnotationChecker]: L15-2 has no Hoare annotation [2020-07-10 18:36:28,015 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-10 18:36:28,015 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-10 18:36:28,015 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2020-07-10 18:36:28,015 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2020-07-10 18:36:28,015 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-10 18:36:28,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.07 06:36:28 BoogieIcfgContainer [2020-07-10 18:36:28,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-10 18:36:28,022 INFO L168 Benchmark]: Toolchain (without parser) took 2142.81 ms. Allocated memory was 135.8 MB in the beginning and 228.6 MB in the end (delta: 92.8 MB). Free memory was 101.1 MB in the beginning and 157.8 MB in the end (delta: -56.7 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:28,023 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 135.8 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 18:36:28,024 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.90 ms. Allocated memory is still 135.8 MB. Free memory was 100.9 MB in the beginning and 91.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:28,025 INFO L168 Benchmark]: Boogie Preprocessor took 32.24 ms. Allocated memory is still 135.8 MB. Free memory was 91.6 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:28,026 INFO L168 Benchmark]: RCFGBuilder took 457.35 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 90.3 MB in the beginning and 164.6 MB in the end (delta: -74.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:28,027 INFO L168 Benchmark]: TraceAbstraction took 1393.78 ms. Allocated memory was 200.3 MB in the beginning and 228.6 MB in the end (delta: 28.3 MB). Free memory was 163.9 MB in the beginning and 157.8 MB in the end (delta: 6.1 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:28,031 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 135.8 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.90 ms. Allocated memory is still 135.8 MB. Free memory was 100.9 MB in the beginning and 91.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.24 ms. Allocated memory is still 135.8 MB. Free memory was 91.6 MB in the beginning and 90.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 457.35 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 90.3 MB in the beginning and 164.6 MB in the end (delta: -74.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1393.78 ms. Allocated memory was 200.3 MB in the beginning and 228.6 MB in the end (delta: 28.3 MB). Free memory was 163.9 MB in the beginning and 157.8 MB in the end (delta: 6.1 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] CALL f(4) [L7] COND FALSE !(n<3) [L8] n-- [L9] CALL f2(n) [L14] COND FALSE !(n<3) [L15] n-- [L16] CALL f(n) [L7] COND TRUE n<3 [L16] RET f(n) [L17] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 11 SDslu, 92 SDs, 0 SdLazy, 56 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...