/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:38:33,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:38:33,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:38:33,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 22:38:33,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 22:38:33,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 22:38:33,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 22:38:33,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 22:38:33,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 22:38:33,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 22:38:33,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 22:38:33,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 22:38:33,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:38:33,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:38:33,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:38:33,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:38:33,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:38:33,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:38:33,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:38:33,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:38:33,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:38:33,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:38:33,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:38:33,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:38:33,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 22:38:33,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 22:38:33,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 22:38:33,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 22:38:33,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 22:38:33,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 22:38:33,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 22:38:33,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 22:38:33,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 22:38:33,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 22:38:33,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 22:38:33,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 22:38:33,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 22:38:33,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 22:38:33,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 22:38:33,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 22:38:33,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 22:38:33,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:38:33,171 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:38:33,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:38:33,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:38:33,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:38:33,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:38:33,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:38:33,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:38:33,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:38:33,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:38:33,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:38:33,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:38:33,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:38:33,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:38:33,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:38:33,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:38:33,176 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:38:33,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:38:33,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:38:33,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:38:33,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:38:33,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:38:33,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:38:33,177 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:38:33,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:38:33,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:38:33,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:38:33,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:38:33,591 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:38:33,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd03.c [2021-02-23 22:38:33,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b386a23ac/5a48aeb21bc04424a3951371e4738931/FLAGddf89d6e2 [2021-02-23 22:38:34,256 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:38:34,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd03.c [2021-02-23 22:38:34,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b386a23ac/5a48aeb21bc04424a3951371e4738931/FLAGddf89d6e2 [2021-02-23 22:38:34,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b386a23ac/5a48aeb21bc04424a3951371e4738931 [2021-02-23 22:38:34,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:38:34,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:38:34,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:38:34,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:38:34,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:38:34,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:34,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461806ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34, skipping insertion in model container [2021-02-23 22:38:34,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:34,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:38:34,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:38:34,923 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd03.c[974,987] [2021-02-23 22:38:34,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:38:34,938 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:38:34,958 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd03.c[974,987] [2021-02-23 22:38:34,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:38:34,976 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:38:34,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34 WrapperNode [2021-02-23 22:38:34,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:38:34,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:38:34,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:38:34,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:38:34,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:34,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:35,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:35,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:35,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:35,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:35,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (1/1) ... [2021-02-23 22:38:35,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:38:35,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:38:35,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:38:35,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:38:35,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (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 [2021-02-23 22:38:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:38:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:38:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:38:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-02-23 22:38:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-02-23 22:38:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:38:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:38:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:38:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:38:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:38:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 22:38:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-02-23 22:38:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-02-23 22:38:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:38:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:38:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:38:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:38:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:38:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:38:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:38:35,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:38:35,477 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 22:38:35,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:38:35 BoogieIcfgContainer [2021-02-23 22:38:35,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:38:35,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:38:35,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:38:35,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:38:35,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:38:34" (1/3) ... [2021-02-23 22:38:35,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d1a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:38:35, skipping insertion in model container [2021-02-23 22:38:35,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:38:34" (2/3) ... [2021-02-23 22:38:35,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d1a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:38:35, skipping insertion in model container [2021-02-23 22:38:35,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:38:35" (3/3) ... [2021-02-23 22:38:35,492 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd03.c [2021-02-23 22:38:35,499 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:38:35,534 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:38:35,570 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:38:35,599 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:38:35,600 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:38:35,600 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:38:35,600 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:38:35,600 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:38:35,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:38:35,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:38:35,601 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:38:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-23 22:38:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 22:38:35,629 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:35,630 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-02-23 22:38:35,630 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1595679359, now seen corresponding path program 1 times [2021-02-23 22:38:35,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:35,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920566325] [2021-02-23 22:38:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:38:35,802 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:38:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:38:35,879 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:38:35,932 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:38:35,933 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:38:35,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:38:35,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:38:35 BoogieIcfgContainer [2021-02-23 22:38:35,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:38:35,979 INFO L168 Benchmark]: Toolchain (without parser) took 1353.15 ms. Allocated memory is still 157.3 MB. Free memory was 133.7 MB in the beginning and 127.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:35,980 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:38:35,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.69 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 123.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:35,982 INFO L168 Benchmark]: Boogie Preprocessor took 34.71 ms. Allocated memory is still 157.3 MB. Free memory was 123.1 MB in the beginning and 121.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:35,983 INFO L168 Benchmark]: RCFGBuilder took 468.42 ms. Allocated memory is still 157.3 MB. Free memory was 121.7 MB in the beginning and 105.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 22:38:35,984 INFO L168 Benchmark]: TraceAbstraction took 492.27 ms. Allocated memory is still 157.3 MB. Free memory was 105.3 MB in the beginning and 127.0 MB in the end (delta: -21.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:38:35,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 130.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 335.69 ms. Allocated memory is still 157.3 MB. Free memory was 132.6 MB in the beginning and 123.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.71 ms. Allocated memory is still 157.3 MB. Free memory was 123.1 MB in the beginning and 121.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 468.42 ms. Allocated memory is still 157.3 MB. Free memory was 121.7 MB in the beginning and 105.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 492.27 ms. Allocated memory is still 157.3 MB. Free memory was 105.3 MB in the beginning and 127.0 MB in the end (delta: -21.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 49]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L40] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, n=0] [L41] COND FALSE !(n < 0) VAL [n=0] [L44] CALL, EXPR isEven(n) VAL [\old(n)=0] [L29] COND TRUE n == 0 VAL [\old(n)=0, n=0] [L30] return 1; VAL [\old(n)=0, \result=1, n=0] [L44] RET, EXPR isEven(n) VAL [isEven(n)=1, n=0] [L44] int result = isEven(n); VAL [isEven(n)=1, n=0, result=1] [L45] int mod = n % 2; VAL [mod=0, n=0, result=1] [L46] COND FALSE !(result < 0 || result == mod) VAL [mod=0, n=0, result=1] [L49] reach_error() VAL [mod=0, n=0, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...