/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_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 18:37:30,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 18:37:30,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 18:37:30,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 18:37:30,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 18:37:30,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 18:37:30,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 18:37:30,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 18:37:30,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 18:37:30,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 18:37:30,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 18:37:30,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 18:37:30,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 18:37:30,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 18:37:30,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 18:37:30,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 18:37:30,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 18:37:30,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 18:37:30,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 18:37:30,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 18:37:30,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 18:37:30,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 18:37:30,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 18:37:30,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 18:37:30,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-10 18:37:30,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-10 18:37:30,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-10 18:37:30,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-10 18:37:30,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-10 18:37:30,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-10 18:37:30,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-10 18:37:30,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-10 18:37:30,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-10 18:37:30,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-10 18:37:30,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-10 18:37:30,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-10 18:37:30,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-10 18:37:30,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-10 18:37:30,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 18:37:30,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 18:37:30,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 18:37:30,270 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 18:37:30,283 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 18:37:30,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 18:37:30,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 18:37:30,286 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 18:37:30,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 18:37:30,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 18:37:30,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 18:37:30,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 18:37:30,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 18:37:30,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 18:37:30,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 18:37:30,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 18:37:30,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 18:37:30,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 18:37:30,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 18:37:30,289 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 18:37:30,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 18:37:30,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 18:37:30,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 18:37:30,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 18:37:30,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 18:37:30,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 18:37:30,290 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 18:37:30,582 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 18:37:30,597 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 18:37:30,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 18:37:30,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 18:37:30,603 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 18:37:30,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-07-10 18:37:30,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d447f39/edefa3a7c119447dadbafb563b17c100/FLAG9936f1f19 [2020-07-10 18:37:31,159 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 18:37:31,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-07-10 18:37:31,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d447f39/edefa3a7c119447dadbafb563b17c100/FLAG9936f1f19 [2020-07-10 18:37:31,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d447f39/edefa3a7c119447dadbafb563b17c100 [2020-07-10 18:37:31,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 18:37:31,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 18:37:31,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 18:37:31,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 18:37:31,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 18:37:31,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7caa8c40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31, skipping insertion in model container [2020-07-10 18:37:31,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 18:37:31,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 18:37:31,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:37:31,773 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 18:37:31,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:37:31,808 INFO L208 MainTranslator]: Completed translation [2020-07-10 18:37:31,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31 WrapperNode [2020-07-10 18:37:31,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 18:37:31,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 18:37:31,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 18:37:31,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 18:37:31,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (1/1) ... [2020-07-10 18:37:31,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 18:37:31,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 18:37:31,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 18:37:31,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 18:37:31,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (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 18:37:31,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 18:37:31,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 18:37:31,992 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-10 18:37:31,992 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-10 18:37:31,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 18:37:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 18:37:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 18:37:31,992 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-10 18:37:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-10 18:37:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 18:37:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 18:37:31,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 18:37:32,507 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 18:37:32,508 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 18:37:32,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:37:32 BoogieIcfgContainer [2020-07-10 18:37:32,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 18:37:32,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 18:37:32,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 18:37:32,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 18:37:32,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 06:37:31" (1/3) ... [2020-07-10 18:37:32,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26062b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:37:32, skipping insertion in model container [2020-07-10 18:37:32,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:37:31" (2/3) ... [2020-07-10 18:37:32,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26062b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:37:32, skipping insertion in model container [2020-07-10 18:37:32,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:37:32" (3/3) ... [2020-07-10 18:37:32,521 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-07-10 18:37:32,533 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 18:37:32,541 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 18:37:32,553 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 18:37:32,573 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 18:37:32,573 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 18:37:32,573 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 18:37:32,573 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 18:37:32,573 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 18:37:32,574 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 18:37:32,574 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 18:37:32,574 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 18:37:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-10 18:37:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 18:37:32,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:37:32,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:37:32,602 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:37:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:37:32,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-10 18:37:32,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:37:32,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789287807] [2020-07-10 18:37:32,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:37:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:32,803 INFO L280 TraceCheckUtils]: 0: Hoare triple {48#true} assume true; {48#true} is VALID [2020-07-10 18:37:32,803 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {48#true} {48#true} #59#return; {48#true} is VALID [2020-07-10 18:37:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:32,869 INFO L280 TraceCheckUtils]: 0: Hoare triple {48#true} ~n := #in~n; {58#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:32,871 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 18:37:32,872 INFO L280 TraceCheckUtils]: 2: Hoare triple {59#(<= |fibo1_#in~n| 0)} #res := 0; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:32,874 INFO L280 TraceCheckUtils]: 3: Hoare triple {59#(<= |fibo1_#in~n| 0)} assume true; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:32,876 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {59#(<= |fibo1_#in~n| 0)} {52#(<= 4 main_~x~0)} #63#return; {49#false} is VALID [2020-07-10 18:37:32,877 INFO L263 TraceCheckUtils]: 0: Hoare triple {48#true} call ULTIMATE.init(); {48#true} is VALID [2020-07-10 18:37:32,878 INFO L280 TraceCheckUtils]: 1: Hoare triple {48#true} assume true; {48#true} is VALID [2020-07-10 18:37:32,878 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {48#true} {48#true} #59#return; {48#true} is VALID [2020-07-10 18:37:32,879 INFO L263 TraceCheckUtils]: 3: Hoare triple {48#true} call #t~ret5 := main(); {48#true} is VALID [2020-07-10 18:37:32,881 INFO L280 TraceCheckUtils]: 4: Hoare triple {48#true} ~x~0 := 4; {52#(<= 4 main_~x~0)} is VALID [2020-07-10 18:37:32,881 INFO L263 TraceCheckUtils]: 5: Hoare triple {52#(<= 4 main_~x~0)} call #t~ret4 := fibo1(~x~0); {48#true} is VALID [2020-07-10 18:37:32,882 INFO L280 TraceCheckUtils]: 6: Hoare triple {48#true} ~n := #in~n; {58#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:32,884 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 18:37:32,885 INFO L280 TraceCheckUtils]: 8: Hoare triple {59#(<= |fibo1_#in~n| 0)} #res := 0; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:32,887 INFO L280 TraceCheckUtils]: 9: Hoare triple {59#(<= |fibo1_#in~n| 0)} assume true; {59#(<= |fibo1_#in~n| 0)} is VALID [2020-07-10 18:37:32,889 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {59#(<= |fibo1_#in~n| 0)} {52#(<= 4 main_~x~0)} #63#return; {49#false} is VALID [2020-07-10 18:37:32,890 INFO L280 TraceCheckUtils]: 11: Hoare triple {49#false} assume -2147483648 <= #t~ret4 && #t~ret4 <= 2147483647; {49#false} is VALID [2020-07-10 18:37:32,891 INFO L280 TraceCheckUtils]: 12: Hoare triple {49#false} ~result~0 := #t~ret4; {49#false} is VALID [2020-07-10 18:37:32,891 INFO L280 TraceCheckUtils]: 13: Hoare triple {49#false} havoc #t~ret4; {49#false} is VALID [2020-07-10 18:37:32,892 INFO L280 TraceCheckUtils]: 14: Hoare triple {49#false} assume 3 == ~result~0; {49#false} is VALID [2020-07-10 18:37:32,892 INFO L280 TraceCheckUtils]: 15: Hoare triple {49#false} assume !false; {49#false} is VALID [2020-07-10 18:37:32,894 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 18:37:32,895 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:37:32,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789287807] [2020-07-10 18:37:32,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:37:32,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 18:37:32,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230518369] [2020-07-10 18:37:32,908 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:37:32,912 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:37:32,916 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 18:37:32,954 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 18:37:32,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 18:37:32,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:37:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 18:37:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 18:37:32,968 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-10 18:37:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:33,427 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-10 18:37:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-10 18:37:33,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:37:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:37:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2020-07-10 18:37:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2020-07-10 18:37:33,447 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 67 transitions. [2020-07-10 18:37:33,576 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 18:37:33,592 INFO L225 Difference]: With dead ends: 58 [2020-07-10 18:37:33,592 INFO L226 Difference]: Without dead ends: 42 [2020-07-10 18:37:33,596 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 18:37:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-10 18:37:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-10 18:37:33,675 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:37:33,676 INFO L82 GeneralOperation]: Start isEquivalent. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:33,676 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:33,677 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:33,685 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-07-10 18:37:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:33,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:33,687 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:33,687 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:33,687 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 42 states. [2020-07-10 18:37:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:33,694 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-07-10 18:37:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:33,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:33,695 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:33,696 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:37:33,696 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:37:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-10 18:37:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-10 18:37:33,703 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-10 18:37:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:37:33,703 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-10 18:37:33,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 18:37:33,704 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 42 states and 49 transitions. [2020-07-10 18:37:33,775 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 18:37:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-10 18:37:33,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:37:33,777 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 18:37:33,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 18:37:33,778 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:37:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:37:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-10 18:37:33,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:37:33,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125685881] [2020-07-10 18:37:33,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:37:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:33,815 INFO L280 TraceCheckUtils]: 0: Hoare triple {348#true} assume true; {348#true} is VALID [2020-07-10 18:37:33,816 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {348#true} {348#true} #59#return; {348#true} is VALID [2020-07-10 18:37:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:37:33,869 INFO L280 TraceCheckUtils]: 0: Hoare triple {348#true} ~n := #in~n; {359#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:33,871 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 18:37:33,872 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 18:37:33,873 INFO L280 TraceCheckUtils]: 3: Hoare triple {360#(<= |fibo1_#in~n| 1)} #res := 1; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:33,874 INFO L280 TraceCheckUtils]: 4: Hoare triple {360#(<= |fibo1_#in~n| 1)} assume true; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:33,876 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {360#(<= |fibo1_#in~n| 1)} {352#(<= 4 main_~x~0)} #63#return; {349#false} is VALID [2020-07-10 18:37:33,877 INFO L263 TraceCheckUtils]: 0: Hoare triple {348#true} call ULTIMATE.init(); {348#true} is VALID [2020-07-10 18:37:33,877 INFO L280 TraceCheckUtils]: 1: Hoare triple {348#true} assume true; {348#true} is VALID [2020-07-10 18:37:33,878 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {348#true} {348#true} #59#return; {348#true} is VALID [2020-07-10 18:37:33,878 INFO L263 TraceCheckUtils]: 3: Hoare triple {348#true} call #t~ret5 := main(); {348#true} is VALID [2020-07-10 18:37:33,881 INFO L280 TraceCheckUtils]: 4: Hoare triple {348#true} ~x~0 := 4; {352#(<= 4 main_~x~0)} is VALID [2020-07-10 18:37:33,882 INFO L263 TraceCheckUtils]: 5: Hoare triple {352#(<= 4 main_~x~0)} call #t~ret4 := fibo1(~x~0); {348#true} is VALID [2020-07-10 18:37:33,883 INFO L280 TraceCheckUtils]: 6: Hoare triple {348#true} ~n := #in~n; {359#(= fibo1_~n |fibo1_#in~n|)} is VALID [2020-07-10 18:37:33,883 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 18:37:33,884 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 18:37:33,885 INFO L280 TraceCheckUtils]: 9: Hoare triple {360#(<= |fibo1_#in~n| 1)} #res := 1; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:33,886 INFO L280 TraceCheckUtils]: 10: Hoare triple {360#(<= |fibo1_#in~n| 1)} assume true; {360#(<= |fibo1_#in~n| 1)} is VALID [2020-07-10 18:37:33,887 INFO L275 TraceCheckUtils]: 11: Hoare quadruple {360#(<= |fibo1_#in~n| 1)} {352#(<= 4 main_~x~0)} #63#return; {349#false} is VALID [2020-07-10 18:37:33,888 INFO L280 TraceCheckUtils]: 12: Hoare triple {349#false} assume -2147483648 <= #t~ret4 && #t~ret4 <= 2147483647; {349#false} is VALID [2020-07-10 18:37:33,888 INFO L280 TraceCheckUtils]: 13: Hoare triple {349#false} ~result~0 := #t~ret4; {349#false} is VALID [2020-07-10 18:37:33,888 INFO L280 TraceCheckUtils]: 14: Hoare triple {349#false} havoc #t~ret4; {349#false} is VALID [2020-07-10 18:37:33,889 INFO L280 TraceCheckUtils]: 15: Hoare triple {349#false} assume 3 == ~result~0; {349#false} is VALID [2020-07-10 18:37:33,889 INFO L280 TraceCheckUtils]: 16: Hoare triple {349#false} assume !false; {349#false} is VALID [2020-07-10 18:37:33,890 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 18:37:33,890 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:37:33,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125685881] [2020-07-10 18:37:33,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:37:33,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 18:37:33,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507234131] [2020-07-10 18:37:33,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-10 18:37:33,894 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:37:33,895 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 18:37:33,915 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 18:37:33,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 18:37:33,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:37:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 18:37:33,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 18:37:33,917 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-10 18:37:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:34,203 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-10 18:37:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-10 18:37:34,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-10 18:37:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:37:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2020-07-10 18:37:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:37:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2020-07-10 18:37:34,210 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 55 transitions. [2020-07-10 18:37:34,285 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 18:37:34,288 INFO L225 Difference]: With dead ends: 50 [2020-07-10 18:37:34,289 INFO L226 Difference]: Without dead ends: 44 [2020-07-10 18:37:34,290 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 18:37:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-10 18:37:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-10 18:37:34,345 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:37:34,345 INFO L82 GeneralOperation]: Start isEquivalent. First operand 44 states. Second operand 42 states. [2020-07-10 18:37:34,346 INFO L74 IsIncluded]: Start isIncluded. First operand 44 states. Second operand 42 states. [2020-07-10 18:37:34,346 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 42 states. [2020-07-10 18:37:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:34,351 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-10 18:37:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-10 18:37:34,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:34,353 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:34,353 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand 44 states. [2020-07-10 18:37:34,353 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 44 states. [2020-07-10 18:37:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:37:34,358 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-10 18:37:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-10 18:37:34,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:37:34,360 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:37:34,360 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:37:34,360 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:37:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-10 18:37:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-10 18:37:34,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-10 18:37:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:37:34,365 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-10 18:37:34,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 18:37:34,366 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 42 states and 49 transitions. [2020-07-10 18:37:34,448 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 18:37:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-10 18:37:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-10 18:37:34,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:37:34,453 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 18:37:34,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 18:37:34,453 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:37:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:37:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-10 18:37:34,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:37:34,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132674] [2020-07-10 18:37:34,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:37:34,492 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 18:37:34,498 INFO L168 Benchmark]: Toolchain (without parser) took 2936.66 ms. Allocated memory was 137.4 MB in the beginning and 232.3 MB in the end (delta: 94.9 MB). Free memory was 102.2 MB in the beginning and 83.0 MB in the end (delta: 19.2 MB). Peak memory consumption was 114.1 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:34,500 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 18:37:34,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.13 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:34,502 INFO L168 Benchmark]: Boogie Preprocessor took 115.33 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.7 MB in the beginning and 180.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:34,502 INFO L168 Benchmark]: RCFGBuilder took 586.97 ms. Allocated memory is still 200.8 MB. Free memory was 180.0 MB in the beginning and 158.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:34,503 INFO L168 Benchmark]: TraceAbstraction took 1981.40 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 158.1 MB in the beginning and 83.0 MB in the end (delta: 75.1 MB). Peak memory consumption was 106.6 MB. Max. memory is 7.1 GB. [2020-07-10 18:37:34,508 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.13 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 91.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.33 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.7 MB in the beginning and 180.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 586.97 ms. Allocated memory is still 200.8 MB. Free memory was 180.0 MB in the beginning and 158.8 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1981.40 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 158.1 MB in the beginning and 83.0 MB in the end (delta: 75.1 MB). Peak memory consumption was 106.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.paraoct.OctagonCalculator.normalizeVarNames(OctagonCalculator.java:153) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...