/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 18:40:43,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 18:40:43,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 18:40:43,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 18:40:43,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 18:40:43,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 18:40:43,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 18:40:43,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 18:40:43,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 18:40:43,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 18:40:43,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 18:40:43,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 18:40:43,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 18:40:43,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 18:40:43,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 18:40:43,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 18:40:43,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 18:40:43,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 18:40:43,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 18:40:43,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 18:40:43,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 18:40:43,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 18:40:43,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 18:40:43,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 18:40:43,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 18:40:43,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 18:40:43,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 18:40:43,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 18:40:43,330 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 18:40:43,339 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 18:40:43,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 18:40:43,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 18:40:43,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 18:40:43,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 18:40:43,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 18:40:43,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 18:40:43,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 18:40:43,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 18:40:43,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 18:40:43,342 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 18:40:43,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 18:40:43,343 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 18:40:43,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 18:40:43,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 18:40:43,343 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 18:40:43,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 18:40:43,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 18:40:43,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 18:40:43,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 18:40:43,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 18:40:43,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 18:40:43,345 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 18:40:43,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 18:40:43,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 18:40:43,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 18:40:43,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 18:40:43,656 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 18:40:43,657 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-10 18:40:43,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cccff29/55564c06a5c9498da4c3a22d13f17c06/FLAG414e169fd [2020-07-10 18:40:44,202 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 18:40:44,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-10 18:40:44,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cccff29/55564c06a5c9498da4c3a22d13f17c06/FLAG414e169fd [2020-07-10 18:40:44,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1cccff29/55564c06a5c9498da4c3a22d13f17c06 [2020-07-10 18:40:44,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 18:40:44,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 18:40:44,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 18:40:44,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 18:40:44,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 18:40:44,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be2124d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44, skipping insertion in model container [2020-07-10 18:40:44,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 18:40:44,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 18:40:44,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:40:44,781 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 18:40:44,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:40:44,814 INFO L208 MainTranslator]: Completed translation [2020-07-10 18:40:44,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44 WrapperNode [2020-07-10 18:40:44,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 18:40:44,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 18:40:44,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 18:40:44,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 18:40:44,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (1/1) ... [2020-07-10 18:40:44,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 18:40:44,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 18:40:44,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 18:40:44,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 18:40:44,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (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 18:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 18:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 18:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-10 18:40:45,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 18:40:45,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 18:40:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 18:40:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-10 18:40:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 18:40:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 18:40:45,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 18:40:45,221 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 18:40:45,221 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 18:40:45,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:40:45 BoogieIcfgContainer [2020-07-10 18:40:45,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 18:40:45,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 18:40:45,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 18:40:45,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 18:40:45,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 06:40:44" (1/3) ... [2020-07-10 18:40:45,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6d8522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:40:45, skipping insertion in model container [2020-07-10 18:40:45,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:40:44" (2/3) ... [2020-07-10 18:40:45,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6d8522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:40:45, skipping insertion in model container [2020-07-10 18:40:45,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:40:45" (3/3) ... [2020-07-10 18:40:45,234 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-07-10 18:40:45,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 18:40:45,252 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 18:40:45,267 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 18:40:45,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 18:40:45,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 18:40:45,290 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 18:40:45,290 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 18:40:45,290 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 18:40:45,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 18:40:45,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 18:40:45,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 18:40:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-10 18:40:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 18:40:45,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:40:45,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:40:45,322 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:40:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:40:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-07-10 18:40:45,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:40:45,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778967980] [2020-07-10 18:40:45,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:40:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:40:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:40:45,621 INFO L280 TraceCheckUtils]: 0: Hoare triple {28#true} assume true; {28#true} is VALID [2020-07-10 18:40:45,622 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {28#true} {28#true} #31#return; {28#true} is VALID [2020-07-10 18:40:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:40:45,696 INFO L280 TraceCheckUtils]: 0: Hoare triple {28#true} ~x := #in~x; {38#(= |id_#in~x| id_~x)} is VALID [2020-07-10 18:40:45,697 INFO L280 TraceCheckUtils]: 1: Hoare triple {38#(= |id_#in~x| id_~x)} assume 0 == ~x; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:40:45,698 INFO L280 TraceCheckUtils]: 2: Hoare triple {39#(= 0 |id_#in~x|)} #res := 0; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:40:45,699 INFO L280 TraceCheckUtils]: 3: Hoare triple {39#(= 0 |id_#in~x|)} assume true; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:40:45,701 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {39#(= 0 |id_#in~x|)} {32#(<= 20 main_~input~0)} #35#return; {29#false} is VALID [2020-07-10 18:40:45,702 INFO L263 TraceCheckUtils]: 0: Hoare triple {28#true} call ULTIMATE.init(); {28#true} is VALID [2020-07-10 18:40:45,703 INFO L280 TraceCheckUtils]: 1: Hoare triple {28#true} assume true; {28#true} is VALID [2020-07-10 18:40:45,703 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {28#true} {28#true} #31#return; {28#true} is VALID [2020-07-10 18:40:45,704 INFO L263 TraceCheckUtils]: 3: Hoare triple {28#true} call #t~ret2 := main(); {28#true} is VALID [2020-07-10 18:40:45,705 INFO L280 TraceCheckUtils]: 4: Hoare triple {28#true} ~input~0 := 20; {32#(<= 20 main_~input~0)} is VALID [2020-07-10 18:40:45,706 INFO L263 TraceCheckUtils]: 5: Hoare triple {32#(<= 20 main_~input~0)} call #t~ret1 := id(~input~0); {28#true} is VALID [2020-07-10 18:40:45,706 INFO L280 TraceCheckUtils]: 6: Hoare triple {28#true} ~x := #in~x; {38#(= |id_#in~x| id_~x)} is VALID [2020-07-10 18:40:45,707 INFO L280 TraceCheckUtils]: 7: Hoare triple {38#(= |id_#in~x| id_~x)} assume 0 == ~x; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:40:45,708 INFO L280 TraceCheckUtils]: 8: Hoare triple {39#(= 0 |id_#in~x|)} #res := 0; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:40:45,709 INFO L280 TraceCheckUtils]: 9: Hoare triple {39#(= 0 |id_#in~x|)} assume true; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:40:45,711 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {39#(= 0 |id_#in~x|)} {32#(<= 20 main_~input~0)} #35#return; {29#false} is VALID [2020-07-10 18:40:45,712 INFO L280 TraceCheckUtils]: 11: Hoare triple {29#false} assume -2147483648 <= #t~ret1 && #t~ret1 <= 2147483647; {29#false} is VALID [2020-07-10 18:40:45,712 INFO L280 TraceCheckUtils]: 12: Hoare triple {29#false} ~result~0 := #t~ret1; {29#false} is VALID [2020-07-10 18:40:45,713 INFO L280 TraceCheckUtils]: 13: Hoare triple {29#false} havoc #t~ret1; {29#false} is VALID [2020-07-10 18:40:45,713 INFO L280 TraceCheckUtils]: 14: Hoare triple {29#false} assume 20 != ~result~0; {29#false} is VALID [2020-07-10 18:40:45,714 INFO L280 TraceCheckUtils]: 15: Hoare triple {29#false} assume !false; {29#false} is VALID [2020-07-10 18:40:45,716 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 18:40:45,717 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:40:45,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778967980] [2020-07-10 18:40:45,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:40:45,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 18:40:45,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134656315] [2020-07-10 18:40:45,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:40:45,732 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:40:45,736 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 18:40:45,789 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 18:40:45,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 18:40:45,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:40:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 18:40:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 18:40:45,803 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-10 18:40:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:40:46,057 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-10 18:40:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-10 18:40:46,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:40:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:40:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:40:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2020-07-10 18:40:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:40:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2020-07-10 18:40:46,074 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 40 transitions. [2020-07-10 18:40:46,159 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:40:46,183 INFO L225 Difference]: With dead ends: 37 [2020-07-10 18:40:46,184 INFO L226 Difference]: Without dead ends: 23 [2020-07-10 18:40:46,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-10 18:40:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-10 18:40:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-10 18:40:46,278 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:40:46,279 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand 23 states. [2020-07-10 18:40:46,280 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-10 18:40:46,280 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-10 18:40:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:40:46,285 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-10 18:40:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-10 18:40:46,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:40:46,287 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:40:46,287 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-10 18:40:46,288 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-10 18:40:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:40:46,292 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-10 18:40:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-10 18:40:46,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:40:46,294 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:40:46,294 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:40:46,294 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:40:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-10 18:40:46,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-10 18:40:46,300 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-07-10 18:40:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:40:46,300 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-10 18:40:46,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 18:40:46,301 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 23 states and 24 transitions. [2020-07-10 18:40:46,344 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:40:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-10 18:40:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-10 18:40:46,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:40:46,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:40:46,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 18:40:46,347 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:40:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:40:46,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-07-10 18:40:46,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:40:46,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951307793] [2020-07-10 18:40:46,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY