/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:40,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:40,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:40,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:40,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:40,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:40,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:40,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:40,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:40,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:40,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:40,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:40,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:40,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:40,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:40,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:40,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:40,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:40,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:40,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:40,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:40,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:40,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:40,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:40,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 10:40:40,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 10:40:40,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 10:40:40,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 10:40:40,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 10:40:40,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 10:40:40,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 10:40:40,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 10:40:40,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 10:40:40,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 10:40:40,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 10:40:40,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 10:40:40,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 10:40:40,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 10:40:40,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:40,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:40,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:40,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:40:40,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:40,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:40,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:40,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:40,924 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:40,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:40,924 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:40,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:40,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:40,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:40,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:40,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:40,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:40,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:40,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:40,928 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:40,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:40,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:40,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:40,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:40,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:40,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:40,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:40,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:40,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:40,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:40,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:40,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:40,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:40,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:40:41,238 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:41,251 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:41,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:41,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:41,255 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:41,256 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd03.c [2020-07-21 10:40:41,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ac19eb9/59467ada3c6f4cb4a4ca4df897acbfc9/FLAG70ba18498 [2020-07-21 10:40:41,739 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:41,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd03.c [2020-07-21 10:40:41,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ac19eb9/59467ada3c6f4cb4a4ca4df897acbfc9/FLAG70ba18498 [2020-07-21 10:40:42,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ac19eb9/59467ada3c6f4cb4a4ca4df897acbfc9 [2020-07-21 10:40:42,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:42,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:42,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:42,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:42,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:42,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125eb49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42, skipping insertion in model container [2020-07-21 10:40:42,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:42,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:42,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:42,388 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:42,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:42,422 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:42,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42 WrapperNode [2020-07-21 10:40:42,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:42,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:42,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:42,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:42,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (1/1) ... [2020-07-21 10:40:42,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:42,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:42,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:42,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:42,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (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 [2020-07-21 10:40:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-07-21 10:40:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-07-21 10:40:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:40:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-07-21 10:40:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-07-21 10:40:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:42,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:42,791 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:42,791 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:40:42,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:42 BoogieIcfgContainer [2020-07-21 10:40:42,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:42,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:42,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:42,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:42,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:42" (1/3) ... [2020-07-21 10:40:42,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1094ddb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:42, skipping insertion in model container [2020-07-21 10:40:42,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:42" (2/3) ... [2020-07-21 10:40:42,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1094ddb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:42, skipping insertion in model container [2020-07-21 10:40:42,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:42" (3/3) ... [2020-07-21 10:40:42,803 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd03.c [2020-07-21 10:40:42,814 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:42,830 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:42,871 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:42,921 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:42,921 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:42,921 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:42,921 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:42,922 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:42,922 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:42,922 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:42,923 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 10:40:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:40:42,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:42,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:42,949 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash -241846627, now seen corresponding path program 1 times [2020-07-21 10:40:42,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:42,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851499809] [2020-07-21 10:40:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:43,015 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:43,025 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:43,040 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:43,041 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:43,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:43,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:43 BoogieIcfgContainer [2020-07-21 10:40:43,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:43,282 INFO L168 Benchmark]: Toolchain (without parser) took 1129.99 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 105.9 MB in the beginning and 155.2 MB in the end (delta: -49.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:43,283 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:43,284 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.47 ms. Allocated memory is still 148.9 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:43,285 INFO L168 Benchmark]: Boogie Preprocessor took 112.28 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 96.2 MB in the beginning and 183.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:43,286 INFO L168 Benchmark]: RCFGBuilder took 259.74 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 169.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:43,287 INFO L168 Benchmark]: TraceAbstraction took 482.60 ms. Allocated memory is still 204.5 MB. Free memory was 169.8 MB in the beginning and 155.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:43,291 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 125.0 MB in the beginning and 124.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.47 ms. Allocated memory is still 148.9 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.28 ms. Allocated memory was 148.9 MB in the beginning and 204.5 MB in the end (delta: 55.6 MB). Free memory was 96.2 MB in the beginning and 183.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.74 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 169.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 482.60 ms. Allocated memory is still 204.5 MB. Free memory was 169.8 MB in the beginning and 155.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 47]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int n = __VERIFIER_nondet_int(); [L39] COND FALSE !(n < 0) VAL [n=0] [L42] CALL, EXPR isEven(n) VAL [\old(n)=0] [L27] COND TRUE n == 0 [L28] return 1; VAL [\old(n)=0, \result=1, n=0] [L42] RET, EXPR isEven(n) VAL [isEven(n)=1, n=0] [L42] int result = isEven(n); [L43] int mod = n % 2; VAL [mod=0, n=0, result=1] [L44] COND FALSE !(result < 0 || result == mod) VAL [mod=0, n=0, result=1] [L47] __VERIFIER_error() VAL [mod=0, n=0, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 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=29occurred 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, 14 NumberOfCodeBlocks, 14 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...