/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_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 18:37:40,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 18:37:40,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 18:37:40,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 18:37:40,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 18:37:40,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 18:37:40,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 18:37:40,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 18:37:40,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 18:37:40,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 18:37:40,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 18:37:40,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 18:37:40,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 18:37:40,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 18:37:40,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 18:37:40,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 18:37:40,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 18:37:40,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 18:37:40,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 18:37:40,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 18:37:40,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 18:37:40,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 18:37:40,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 18:37:40,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 18:37:40,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-10 18:37:40,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-10 18:37:40,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-10 18:37:40,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-10 18:37:40,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-10 18:37:40,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-10 18:37:40,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-10 18:37:40,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-10 18:37:40,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-10 18:37:40,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-10 18:37:40,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-10 18:37:40,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-10 18:37:40,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-10 18:37:40,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-10 18:37:40,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 18:37:40,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 18:37:40,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 18:37:40,235 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 18:37:40,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 18:37:40,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 18:37:40,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 18:37:40,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 18:37:40,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 18:37:40,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 18:37:40,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 18:37:40,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 18:37:40,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 18:37:40,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 18:37:40,261 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 18:37:40,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 18:37:40,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 18:37:40,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 18:37:40,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 18:37:40,262 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 18:37:40,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 18:37:40,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 18:37:40,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 18:37:40,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 18:37:40,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 18:37:40,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 18:37:40,263 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 18:37:40,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 18:37:40,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 18:37:40,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 18:37:40,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 18:37:40,576 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 18:37:40,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-10 18:37:40,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f412f6ad7/9af6e789f3f84780b37ce4bec606f1fa/FLAG25468d904 [2020-07-10 18:37:41,125 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 18:37:41,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-10 18:37:41,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f412f6ad7/9af6e789f3f84780b37ce4bec606f1fa/FLAG25468d904 [2020-07-10 18:37:41,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f412f6ad7/9af6e789f3f84780b37ce4bec606f1fa [2020-07-10 18:37:41,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 18:37:41,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 18:37:41,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 18:37:41,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 18:37:41,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 18:37:41,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3377739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41, skipping insertion in model container [2020-07-10 18:37:41,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 18:37:41,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 18:37:41,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:37:41,703 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 18:37:41,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:37:41,739 INFO L208 MainTranslator]: Completed translation [2020-07-10 18:37:41,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41 WrapperNode [2020-07-10 18:37:41,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 18:37:41,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 18:37:41,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 18:37:41,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 18:37:41,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (1/1) ... [2020-07-10 18:37:41,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 18:37:41,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 18:37:41,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 18:37:41,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 18:37:41,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (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 18:37:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 18:37:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 18:37:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-10 18:37:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-10 18:37:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 18:37:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 18:37:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 18:37:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-10 18:37:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-10 18:37:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 18:37:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 18:37:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 18:37:42,266 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 18:37:42,266 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 18:37:42,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:37:42 BoogieIcfgContainer [2020-07-10 18:37:42,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 18:37:42,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 18:37:42,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 18:37:42,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 18:37:42,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 06:37:41" (1/3) ... [2020-07-10 18:37:42,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638c1f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:37:42, skipping insertion in model container [2020-07-10 18:37:42,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:41" (2/3) ... [2020-07-10 18:37:42,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638c1f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:37:42, skipping insertion in model container [2020-07-10 18:37:42,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:37:42" (3/3) ... [2020-07-10 18:37:42,281 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-10 18:37:42,293 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 18:37:42,301 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 18:37:42,317 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 18:37:42,342 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 18:37:42,342 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 18:37:42,342 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 18:37:42,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 18:37:42,342 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 18:37:42,343 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 18:37:42,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 18:37:42,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 18:37:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-10 18:37:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 18:37:42,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:37:42,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:37:42,394 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:37:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:37:42,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-10 18:37:42,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:37:42,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084067710] [2020-07-10 18:37:42,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:37:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:42,600 INFO L280 TraceCheckUtils]: 0: Hoare triple {48#true} assume true; {48#true} is VALID [2020-07-10 18:37:42,601 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {48#true} {48#true} #59#return; {48#true} is VALID [2020-07-10 18:37:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:42,669 INFO L280 TraceCheckUtils]: 0: Hoare triple {48#true} ~n := #in~n; {58#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:42,671 INFO L280 TraceCheckUtils]: 1: Hoare triple {58#(= fibo1_~n |fibo1_#in~n|)} assume ~n < 1; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:42,672 INFO L280 TraceCheckUtils]: 2: Hoare triple {59#(<= |fibo1_#in~n| 0)} #res := 0; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:42,674 INFO L280 TraceCheckUtils]: 3: Hoare triple {59#(<= |fibo1_#in~n| 0)} assume true; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:42,678 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {59#(<= |fibo1_#in~n| 0)} {52#(<= 6 main_~x~0)} #63#return; {49#false} is VALID [2020-07-10 18:37:42,679 INFO L263 TraceCheckUtils]: 0: Hoare triple {48#true} call ULTIMATE.init(); {48#true} is VALID [2020-07-10 18:37:42,680 INFO L280 TraceCheckUtils]: 1: Hoare triple {48#true} assume true; {48#true} is VALID [2020-07-10 18:37:42,680 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {48#true} {48#true} #59#return; {48#true} is VALID [2020-07-10 18:37:42,681 INFO L263 TraceCheckUtils]: 3: Hoare triple {48#true} call #t~ret5 := main(); {48#true} is VALID [2020-07-10 18:37:42,684 INFO L280 TraceCheckUtils]: 4: Hoare triple {48#true} ~x~0 := 6; {52#(<= 6 main_~x~0)} is VALID [2020-07-10 18:37:42,685 INFO L263 TraceCheckUtils]: 5: Hoare triple {52#(<= 6 main_~x~0)} call #t~ret4 := fibo1(~x~0); {48#true} is VALID [2020-07-10 18:37:42,686 INFO L280 TraceCheckUtils]: 6: Hoare triple {48#true} ~n := #in~n; {58#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:42,694 INFO L280 TraceCheckUtils]: 7: Hoare triple {58#(= fibo1_~n |fibo1_#in~n|)} assume ~n < 1; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:42,696 INFO L280 TraceCheckUtils]: 8: Hoare triple {59#(<= |fibo1_#in~n| 0)} #res := 0; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:42,697 INFO L280 TraceCheckUtils]: 9: Hoare triple {59#(<= |fibo1_#in~n| 0)} assume true; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:42,701 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {59#(<= |fibo1_#in~n| 0)} {52#(<= 6 main_~x~0)} #63#return; {49#false} is VALID [2020-07-10 18:37:42,702 INFO L280 TraceCheckUtils]: 11: Hoare triple {49#false} assume -2147483648 <= #t~ret4 && #t~ret4 <= 2147483647; {49#false} is VALID [2020-07-10 18:37:42,705 INFO L280 TraceCheckUtils]: 12: Hoare triple {49#false} ~result~0 := #t~ret4; {49#false} is VALID [2020-07-10 18:37:42,705 INFO L280 TraceCheckUtils]: 13: Hoare triple {49#false} havoc #t~ret4; {49#false} is VALID [2020-07-10 18:37:42,706 INFO L280 TraceCheckUtils]: 14: Hoare triple {49#false} assume 8 != ~result~0; {49#false} is VALID [2020-07-10 18:37:42,706 INFO L280 TraceCheckUtils]: 15: Hoare triple {49#false} assume !false; {49#false} is VALID [2020-07-10 18:37:42,709 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 18:37:42,709 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:37:42,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084067710] [2020-07-10 18:37:42,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:37:42,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 18:37:42,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596242929] [2020-07-10 18:37:42,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:37:42,731 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:37:42,737 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 18:37:42,784 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 18:37:42,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 18:37:42,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:37:42,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 18:37:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 18:37:42,802 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-10 18:37:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:43,265 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-10 18:37:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-10 18:37:43,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:37:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:37:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2020-07-10 18:37:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2020-07-10 18:37:43,296 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 67 transitions. [2020-07-10 18:37:43,429 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 67 edges. 67 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:37:43,460 INFO L225 Difference]: With dead ends: 58 [2020-07-10 18:37:43,460 INFO L226 Difference]: Without dead ends: 42 [2020-07-10 18:37:43,470 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 [2020-07-10 18:37:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-10 18:37:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-10 18:37:43,580 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:37:43,580 INFO L82 GeneralOperation]: Start isEquivalent. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:43,581 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:43,581 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:43,596 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-07-10 18:37:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:43,598 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:43,598 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:43,599 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:43,599 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:43,617 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-07-10 18:37:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:43,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:43,619 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:43,619 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:37:43,620 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:37:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-10 18:37:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-10 18:37:43,635 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-10 18:37:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:37:43,636 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-10 18:37:43,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 18:37:43,637 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 42 states and 49 transitions. [2020-07-10 18:37:43,701 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 49 edges. 49 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:37:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-10 18:37:43,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:37:43,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:37:43,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 18:37:43,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:37:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:37:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-10 18:37:43,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:37:43,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44749712] [2020-07-10 18:37:43,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:37:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:43,788 INFO L280 TraceCheckUtils]: 0: Hoare triple {348#true} assume true; {348#true} is VALID [2020-07-10 18:37:43,789 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {348#true} {348#true} #59#return; {348#true} is VALID [2020-07-10 18:37:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:43,840 INFO L280 TraceCheckUtils]: 0: Hoare triple {348#true} ~n := #in~n; {359#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:43,842 INFO L280 TraceCheckUtils]: 1: Hoare triple {359#(= fibo1_~n |fibo1_#in~n|)} assume !(~n < 1); {359#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:43,843 INFO L280 TraceCheckUtils]: 2: Hoare triple {359#(= fibo1_~n |fibo1_#in~n|)} assume 1 == ~n; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:43,845 INFO L280 TraceCheckUtils]: 3: Hoare triple {360#(<= |fibo1_#in~n| 1)} #res := 1; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:43,845 INFO L280 TraceCheckUtils]: 4: Hoare triple {360#(<= |fibo1_#in~n| 1)} assume true; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:43,848 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {360#(<= |fibo1_#in~n| 1)} {352#(<= 6 main_~x~0)} #63#return; {349#false} is VALID [2020-07-10 18:37:43,848 INFO L263 TraceCheckUtils]: 0: Hoare triple {348#true} call ULTIMATE.init(); {348#true} is VALID [2020-07-10 18:37:43,849 INFO L280 TraceCheckUtils]: 1: Hoare triple {348#true} assume true; {348#true} is VALID [2020-07-10 18:37:43,852 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {348#true} {348#true} #59#return; {348#true} is VALID [2020-07-10 18:37:43,852 INFO L263 TraceCheckUtils]: 3: Hoare triple {348#true} call #t~ret5 := main(); {348#true} is VALID [2020-07-10 18:37:43,854 INFO L280 TraceCheckUtils]: 4: Hoare triple {348#true} ~x~0 := 6; {352#(<= 6 main_~x~0)} is VALID [2020-07-10 18:37:43,854 INFO L263 TraceCheckUtils]: 5: Hoare triple {352#(<= 6 main_~x~0)} call #t~ret4 := fibo1(~x~0); {348#true} is VALID [2020-07-10 18:37:43,855 INFO L280 TraceCheckUtils]: 6: Hoare triple {348#true} ~n := #in~n; {359#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:43,856 INFO L280 TraceCheckUtils]: 7: Hoare triple {359#(= fibo1_~n |fibo1_#in~n|)} assume !(~n < 1); {359#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:43,857 INFO L280 TraceCheckUtils]: 8: Hoare triple {359#(= fibo1_~n |fibo1_#in~n|)} assume 1 == ~n; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:43,857 INFO L280 TraceCheckUtils]: 9: Hoare triple {360#(<= |fibo1_#in~n| 1)} #res := 1; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:43,858 INFO L280 TraceCheckUtils]: 10: Hoare triple {360#(<= |fibo1_#in~n| 1)} assume true; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:43,860 INFO L275 TraceCheckUtils]: 11: Hoare quadruple {360#(<= |fibo1_#in~n| 1)} {352#(<= 6 main_~x~0)} #63#return; {349#false} is VALID [2020-07-10 18:37:43,860 INFO L280 TraceCheckUtils]: 12: Hoare triple {349#false} assume -2147483648 <= #t~ret4 && #t~ret4 <= 2147483647; {349#false} is VALID [2020-07-10 18:37:43,861 INFO L280 TraceCheckUtils]: 13: Hoare triple {349#false} ~result~0 := #t~ret4; {349#false} is VALID [2020-07-10 18:37:43,861 INFO L280 TraceCheckUtils]: 14: Hoare triple {349#false} havoc #t~ret4; {349#false} is VALID [2020-07-10 18:37:43,861 INFO L280 TraceCheckUtils]: 15: Hoare triple {349#false} assume 8 != ~result~0; {349#false} is VALID [2020-07-10 18:37:43,861 INFO L280 TraceCheckUtils]: 16: Hoare triple {349#false} assume !false; {349#false} is VALID [2020-07-10 18:37:43,862 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 18:37:43,863 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:37:43,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44749712] [2020-07-10 18:37:43,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:37:43,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 18:37:43,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072103253] [2020-07-10 18:37:43,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-10 18:37:43,867 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:37:43,868 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 18:37:43,894 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:37:43,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 18:37:43,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:37:43,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 18:37:43,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 18:37:43,896 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-10 18:37:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:44,164 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-10 18:37:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-10 18:37:44,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-10 18:37:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:37:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2020-07-10 18:37:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2020-07-10 18:37:44,173 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 55 transitions. [2020-07-10 18:37:44,257 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:37:44,260 INFO L225 Difference]: With dead ends: 50 [2020-07-10 18:37:44,260 INFO L226 Difference]: Without dead ends: 44 [2020-07-10 18:37:44,262 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 [2020-07-10 18:37:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-10 18:37:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-10 18:37:44,313 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:37:44,313 INFO L82 GeneralOperation]: Start isEquivalent. First operand 44 states. Second operand 42 states. [2020-07-10 18:37:44,314 INFO L74 IsIncluded]: Start isIncluded. First operand 44 states. Second operand 42 states. [2020-07-10 18:37:44,314 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 42 states. [2020-07-10 18:37:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:44,319 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-10 18:37:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-10 18:37:44,321 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:44,321 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:44,322 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand 44 states. [2020-07-10 18:37:44,322 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 44 states. [2020-07-10 18:37:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:44,327 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-10 18:37:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-10 18:37:44,329 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:44,329 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:44,329 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:37:44,329 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:37:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-10 18:37:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-10 18:37:44,334 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-10 18:37:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:37:44,334 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-10 18:37:44,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 18:37:44,335 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 42 states and 49 transitions. [2020-07-10 18:37:44,433 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 49 edges. 49 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:37:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-10 18:37:44,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:37:44,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:37:44,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 18:37:44,439 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:37:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:37:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-10 18:37:44,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:37:44,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078930456] [2020-07-10 18:37:44,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:37:44,474 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.(FastUPRCore.java:133) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.fastUprAcceleration(Accelerator.java:101) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.accelerateLoop(Accelerator.java:82) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:219) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-10 18:37:44,481 INFO L168 Benchmark]: Toolchain (without parser) took 3028.78 ms. Allocated memory was 144.7 MB in the beginning and 234.4 MB in the end (delta: 89.7 MB). Free memory was 103.9 MB in the beginning and 84.9 MB in the end (delta: 19.0 MB). Peak memory consumption was 108.7 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:44,482 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 144.7 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 18:37:44,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.25 ms. Allocated memory is still 144.7 MB. Free memory was 103.7 MB in the beginning and 93.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:44,485 INFO L168 Benchmark]: Boogie Preprocessor took 117.42 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 93.9 MB in the beginning and 180.6 MB in the end (delta: -86.8 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:44,486 INFO L168 Benchmark]: RCFGBuilder took 413.73 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 159.1 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:44,489 INFO L168 Benchmark]: TraceAbstraction took 2204.28 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 159.1 MB in the beginning and 84.9 MB in the end (delta: 74.3 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:44,505 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 1.18 ms. Allocated memory is still 144.7 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.25 ms. Allocated memory is still 144.7 MB. Free memory was 103.7 MB in the beginning and 93.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.42 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 93.9 MB in the beginning and 180.6 MB in the end (delta: -86.8 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.73 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 159.1 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2204.28 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 159.1 MB in the beginning and 84.9 MB in the end (delta: 74.3 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...