/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-b7b32d2 [2021-02-22 00:15:43,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 00:15:43,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 00:15:43,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 00:15:43,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-22 00:15:44,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 00:15:44,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 00:15:44,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 00:15:44,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 00:15:44,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 00:15:44,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 00:15:44,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 00:15:44,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 00:15:44,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 00:15:44,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 00:15:44,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 00:15:44,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 00:15:44,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 00:15:44,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 00:15:44,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 00:15:44,005 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 00:15:44,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 00:15:44,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 00:15:44,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 00:15:44,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 00:15:44,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 00:15:44,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 00:15:44,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-22 00:15:44,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 00:15:44,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 00:15:44,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 00:15:44,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 00:15:44,497 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 00:15:44,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd03.c [2021-02-22 00:15:44,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05946d35a/6bfd65ba76c64297a30b4ec6392a7d78/FLAGd9eb8a9a1 [2021-02-22 00:15:45,208 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 00:15:45,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd03.c [2021-02-22 00:15:45,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05946d35a/6bfd65ba76c64297a30b4ec6392a7d78/FLAGd9eb8a9a1 [2021-02-22 00:15:45,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05946d35a/6bfd65ba76c64297a30b4ec6392a7d78 [2021-02-22 00:15:45,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 00:15:45,608 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 00:15:45,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 00:15:45,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 00:15:45,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 00:15:45,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198eef87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45, skipping insertion in model container [2021-02-22 00:15:45,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 00:15:45,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 00:15:45,892 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] [2021-02-22 00:15:45,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 00:15:45,907 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 00:15:45,932 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] [2021-02-22 00:15:45,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 00:15:45,949 INFO L208 MainTranslator]: Completed translation [2021-02-22 00:15:45,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45 WrapperNode [2021-02-22 00:15:45,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 00:15:45,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 00:15:45,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 00:15:45,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 00:15:45,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (1/1) ... [2021-02-22 00:15:45,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 00:15:45,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 00:15:45,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 00:15:45,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 00:15:45,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (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 [2021-02-22 00:15:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 00:15:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 00:15:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 00:15:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-02-22 00:15:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-02-22 00:15:46,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 00:15:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 00:15:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 00:15:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 00:15:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 00:15:46,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 00:15:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-02-22 00:15:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-02-22 00:15:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 00:15:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 00:15:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 00:15:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 00:15:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 00:15:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 00:15:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 00:15:46,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 00:15:46,673 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 00:15:46,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 12:15:46 BoogieIcfgContainer [2021-02-22 00:15:46,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 00:15:46,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 00:15:46,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 00:15:46,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 00:15:46,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 12:15:45" (1/3) ... [2021-02-22 00:15:46,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b6ae40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 12:15:46, skipping insertion in model container [2021-02-22 00:15:46,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 12:15:45" (2/3) ... [2021-02-22 00:15:46,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b6ae40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 12:15:46, skipping insertion in model container [2021-02-22 00:15:46,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 12:15:46" (3/3) ... [2021-02-22 00:15:46,701 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd03.c [2021-02-22 00:15:46,713 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 00:15:46,718 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 00:15:46,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 00:15:46,771 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 00:15:46,771 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 00:15:46,771 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-22 00:15:46,771 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 00:15:46,772 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 00:15:46,772 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 00:15:46,772 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 00:15:46,772 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 00:15:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-22 00:15:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-22 00:15:46,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 00:15:46,799 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] [2021-02-22 00:15:46,800 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 00:15:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 00:15:46,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1595679359, now seen corresponding path program 1 times [2021-02-22 00:15:46,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 00:15:46,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200348108] [2021-02-22 00:15:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 00:15:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 00:15:46,917 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 00:15:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 00:15:46,939 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 00:15:46,986 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 00:15:46,987 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 00:15:46,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 00:15:47,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 12:15:47 BoogieIcfgContainer [2021-02-22 00:15:47,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 00:15:47,057 INFO L168 Benchmark]: Toolchain (without parser) took 1459.20 ms. Allocated memory is still 169.9 MB. Free memory was 145.6 MB in the beginning and 135.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 8.0 GB. [2021-02-22 00:15:47,060 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 169.9 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 00:15:47,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.78 ms. Allocated memory is still 169.9 MB. Free memory was 144.6 MB in the beginning and 135.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 00:15:47,067 INFO L168 Benchmark]: Boogie Preprocessor took 36.16 ms. Allocated memory is still 169.9 MB. Free memory was 135.1 MB in the beginning and 133.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 00:15:47,069 INFO L168 Benchmark]: RCFGBuilder took 696.15 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 152.4 MB in the end (delta: -18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-22 00:15:47,070 INFO L168 Benchmark]: TraceAbstraction took 365.48 ms. Allocated memory is still 169.9 MB. Free memory was 151.9 MB in the beginning and 135.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 00:15:47,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 169.9 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.78 ms. Allocated memory is still 169.9 MB. Free memory was 144.6 MB in the beginning and 135.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.16 ms. Allocated memory is still 169.9 MB. Free memory was 135.1 MB in the beginning and 133.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 696.15 ms. Allocated memory is still 169.9 MB. Free memory was 133.6 MB in the beginning and 152.4 MB in the end (delta: -18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 365.48 ms. Allocated memory is still 169.9 MB. Free memory was 151.9 MB in the beginning and 135.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. 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: 0.2s, 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...