/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/fibo_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 00:14:10,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 00:14:10,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 00:14:10,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 00:14:10,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 00:14:10,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 00:14:10,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 00:14:10,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 00:14:10,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 00:14:10,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 00:14:10,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 00:14:10,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 00:14:10,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 00:14:10,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 00:14:10,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 00:14:10,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 00:14:10,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 00:14:10,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 00:14:10,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 00:14:10,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 00:14:10,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 00:14:10,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 00:14:10,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 00:14:10,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 00:14:10,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 00:14:10,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 00:14:10,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 00:14:10,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 00:14:10,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 00:14:10,876 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 00:14:10,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 00:14:10,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 00:14:10,879 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 00:14:10,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 00:14:10,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 00:14:10,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 00:14:10,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 00:14:10,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 00:14:10,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 00:14:10,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 00:14:10,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 00:14:10,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 00:14:10,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 00:14:10,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 00:14:10,881 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 00:14:10,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 00:14:10,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 00:14:10,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 00:14:10,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 00:14:10,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 00:14:10,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 00:14:10,882 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-18 00:14:11,170 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 00:14:11,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 00:14:11,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 00:14:11,188 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 00:14:11,189 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 00:14:11,189 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-18 00:14:11,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de7abb80/58cdb18eaab34d5d8c5671e79818ee5a/FLAG2c50eea4b [2020-07-18 00:14:11,742 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 00:14:11,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-18 00:14:11,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de7abb80/58cdb18eaab34d5d8c5671e79818ee5a/FLAG2c50eea4b [2020-07-18 00:14:12,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de7abb80/58cdb18eaab34d5d8c5671e79818ee5a [2020-07-18 00:14:12,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 00:14:12,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 00:14:12,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 00:14:12,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 00:14:12,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 00:14:12,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a985fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12, skipping insertion in model container [2020-07-18 00:14:12,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 00:14:12,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 00:14:12,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:14:12,341 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 00:14:12,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:14:12,373 INFO L208 MainTranslator]: Completed translation [2020-07-18 00:14:12,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12 WrapperNode [2020-07-18 00:14:12,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 00:14:12,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 00:14:12,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 00:14:12,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 00:14:12,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (1/1) ... [2020-07-18 00:14:12,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 00:14:12,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 00:14:12,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 00:14:12,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 00:14:12,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (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 [2020-07-18 00:14:12,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 00:14:12,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 00:14:12,559 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-18 00:14:12,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 00:14:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-18 00:14:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 00:14:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-18 00:14:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 00:14:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 00:14:12,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 00:14:12,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 00:14:12,887 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-18 00:14:12,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:14:12 BoogieIcfgContainer [2020-07-18 00:14:12,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 00:14:12,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 00:14:12,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 00:14:12,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 00:14:12,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 12:14:12" (1/3) ... [2020-07-18 00:14:12,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:14:12, skipping insertion in model container [2020-07-18 00:14:12,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:14:12" (2/3) ... [2020-07-18 00:14:12,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:14:12, skipping insertion in model container [2020-07-18 00:14:12,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:14:12" (3/3) ... [2020-07-18 00:14:12,913 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-2.c [2020-07-18 00:14:12,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 00:14:12,929 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 00:14:12,944 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 00:14:12,968 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 00:14:12,968 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 00:14:12,968 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-18 00:14:12,968 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 00:14:12,969 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 00:14:12,969 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 00:14:12,969 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 00:14:12,969 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 00:14:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-18 00:14:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-18 00:14:12,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:14:12,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:14:12,995 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:14:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:14:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-07-18 00:14:13,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:14:13,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82259452] [2020-07-18 00:14:13,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:14:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:13,213 INFO L280 TraceCheckUtils]: 0: Hoare triple {34#true} assume true; {34#true} is VALID [2020-07-18 00:14:13,213 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {34#true} {34#true} #40#return; {34#true} is VALID [2020-07-18 00:14:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:13,278 INFO L280 TraceCheckUtils]: 0: Hoare triple {34#true} ~n := #in~n; {44#(= fibo_~n |fibo_#in~n|)} is VALID [2020-07-18 00:14:13,280 INFO L280 TraceCheckUtils]: 1: Hoare triple {44#(= fibo_~n |fibo_#in~n|)} assume ~n < 1; {45#(<= |fibo_#in~n| 0)} is VALID [2020-07-18 00:14:13,281 INFO L280 TraceCheckUtils]: 2: Hoare triple {45#(<= |fibo_#in~n| 0)} #res := 0; {45#(<= |fibo_#in~n| 0)} is VALID [2020-07-18 00:14:13,282 INFO L280 TraceCheckUtils]: 3: Hoare triple {45#(<= |fibo_#in~n| 0)} assume true; {45#(<= |fibo_#in~n| 0)} is VALID [2020-07-18 00:14:13,284 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {45#(<= |fibo_#in~n| 0)} {38#(<= 20 main_~x~0)} #44#return; {35#false} is VALID [2020-07-18 00:14:13,285 INFO L263 TraceCheckUtils]: 0: Hoare triple {34#true} call ULTIMATE.init(); {34#true} is VALID [2020-07-18 00:14:13,285 INFO L280 TraceCheckUtils]: 1: Hoare triple {34#true} assume true; {34#true} is VALID [2020-07-18 00:14:13,286 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {34#true} {34#true} #40#return; {34#true} is VALID [2020-07-18 00:14:13,286 INFO L263 TraceCheckUtils]: 3: Hoare triple {34#true} call #t~ret3 := main(); {34#true} is VALID [2020-07-18 00:14:13,287 INFO L280 TraceCheckUtils]: 4: Hoare triple {34#true} ~x~0 := 20; {38#(<= 20 main_~x~0)} is VALID [2020-07-18 00:14:13,288 INFO L263 TraceCheckUtils]: 5: Hoare triple {38#(<= 20 main_~x~0)} call #t~ret2 := fibo(~x~0); {34#true} is VALID [2020-07-18 00:14:13,289 INFO L280 TraceCheckUtils]: 6: Hoare triple {34#true} ~n := #in~n; {44#(= fibo_~n |fibo_#in~n|)} is VALID [2020-07-18 00:14:13,290 INFO L280 TraceCheckUtils]: 7: Hoare triple {44#(= fibo_~n |fibo_#in~n|)} assume ~n < 1; {45#(<= |fibo_#in~n| 0)} is VALID [2020-07-18 00:14:13,292 INFO L280 TraceCheckUtils]: 8: Hoare triple {45#(<= |fibo_#in~n| 0)} #res := 0; {45#(<= |fibo_#in~n| 0)} is VALID [2020-07-18 00:14:13,293 INFO L280 TraceCheckUtils]: 9: Hoare triple {45#(<= |fibo_#in~n| 0)} assume true; {45#(<= |fibo_#in~n| 0)} is VALID [2020-07-18 00:14:13,295 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {45#(<= |fibo_#in~n| 0)} {38#(<= 20 main_~x~0)} #44#return; {35#false} is VALID [2020-07-18 00:14:13,295 INFO L280 TraceCheckUtils]: 11: Hoare triple {35#false} assume -2147483648 <= #t~ret2 && #t~ret2 <= 2147483647; {35#false} is VALID [2020-07-18 00:14:13,296 INFO L280 TraceCheckUtils]: 12: Hoare triple {35#false} ~result~0 := #t~ret2; {35#false} is VALID [2020-07-18 00:14:13,296 INFO L280 TraceCheckUtils]: 13: Hoare triple {35#false} havoc #t~ret2; {35#false} is VALID [2020-07-18 00:14:13,297 INFO L280 TraceCheckUtils]: 14: Hoare triple {35#false} assume 6765 != ~result~0; {35#false} is VALID [2020-07-18 00:14:13,297 INFO L280 TraceCheckUtils]: 15: Hoare triple {35#false} assume !false; {35#false} is VALID [2020-07-18 00:14:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 00:14:13,440 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:14:13,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82259452] [2020-07-18 00:14:13,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 00:14:13,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-18 00:14:13,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945202781] [2020-07-18 00:14:13,453 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-07-18 00:14:13,456 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 00:14:13,460 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 9 states. [2020-07-18 00:14:13,474 WARN L140 InductivityCheck]: Transition 49#(and (<= 0 (+ main_~result~0 2147483648)) (<= main_~result~0 2147483647) (not (= 6765 main_~result~0)) (<= |fibo_#in~n| 0)) ( _ , assume !false; , 35#false ) not inductive [2020-07-18 00:14:13,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 00:14:13,476 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inductivity failed at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.evaluateResult(InductivityCheck.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.checkInductivity(InductivityCheck.java:103) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.(InductivityCheck.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.constructInterpolantAutomaton(BasicCegarLoop.java:583) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:455) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-18 00:14:13,482 INFO L168 Benchmark]: Toolchain (without parser) took 1347.23 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 101.3 MB in the beginning and 125.7 MB in the end (delta: -24.4 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:13,483 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-18 00:14:13,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.11 ms. Allocated memory is still 144.2 MB. Free memory was 100.9 MB in the beginning and 91.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:13,486 INFO L168 Benchmark]: Boogie Preprocessor took 30.10 ms. Allocated memory is still 144.2 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:13,487 INFO L168 Benchmark]: RCFGBuilder took 487.30 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 90.1 MB in the beginning and 164.8 MB in the end (delta: -74.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:13,488 INFO L168 Benchmark]: TraceAbstraction took 579.81 ms. Allocated memory is still 201.9 MB. Free memory was 164.1 MB in the beginning and 125.7 MB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:13,492 INFO L336 ainManager$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 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.11 ms. Allocated memory is still 144.2 MB. Free memory was 100.9 MB in the beginning and 91.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.10 ms. Allocated memory is still 144.2 MB. Free memory was 91.5 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 487.30 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 90.1 MB in the beginning and 164.8 MB in the end (delta: -74.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 579.81 ms. Allocated memory is still 201.9 MB. Free memory was 164.1 MB in the beginning and 125.7 MB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inductivity failed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inductivity failed: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.evaluateResult(InductivityCheck.java:142) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...