/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:21:28,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:21:28,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:21:28,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:21:28,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:21:28,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:21:28,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:21:28,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:21:28,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:21:28,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:21:28,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:21:28,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:21:28,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:21:28,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:21:28,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:21:28,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:21:28,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:21:28,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:21:28,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:21:28,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:21:28,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:21:28,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:21:28,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:21:28,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:21:28,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:21:28,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:21:28,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:21:28,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:21:28,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:21:28,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:21:28,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:21:28,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:21:28,432 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:21:28,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:21:28,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:21:28,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:21:28,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:21:28,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:21:28,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:21:28,435 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:21:28,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:21:28,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:21:28,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:21:28,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:21:28,436 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:21:28,436 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:21:28,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:21:28,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:21:28,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:21:28,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:21:28,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:21:28,438 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:21:28,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:21:28,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:21:28,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:21:28,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:21:28,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:21:28,905 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:21:28,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2021-02-24 04:21:29,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/466c79fa7/a10c7bb9bdd34243952b2b4613f41518/FLAG7166e4472 [2021-02-24 04:21:29,684 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:21:29,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i [2021-02-24 04:21:29,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/466c79fa7/a10c7bb9bdd34243952b2b4613f41518/FLAG7166e4472 [2021-02-24 04:21:30,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/466c79fa7/a10c7bb9bdd34243952b2b4613f41518 [2021-02-24 04:21:30,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:21:30,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:21:30,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:21:30,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:21:30,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:21:30,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@669fcdd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30, skipping insertion in model container [2021-02-24 04:21:30,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:21:30,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:21:30,299 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i[409,422] [2021-02-24 04:21:30,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:21:30,359 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:21:30,378 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i[409,422] [2021-02-24 04:21:30,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:21:30,418 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:21:30,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30 WrapperNode [2021-02-24 04:21:30,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:21:30,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:21:30,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:21:30,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:21:30,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (1/1) ... [2021-02-24 04:21:30,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:21:30,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:21:30,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:21:30,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:21:30,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (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 [2021-02-24 04:21:30,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:21:30,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:21:30,609 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:21:30,610 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2021-02-24 04:21:30,610 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2021-02-24 04:21:30,610 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-02-24 04:21:30,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:21:30,610 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:21:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:21:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:21:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:21:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 04:21:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure err [2021-02-24 04:21:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2021-02-24 04:21:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 04:21:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-02-24 04:21:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:21:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-24 04:21:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:21:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-24 04:21:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:21:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:21:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:21:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:21:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:21:31,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:21:31,164 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:21:31,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:21:31 BoogieIcfgContainer [2021-02-24 04:21:31,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:21:31,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:21:31,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:21:31,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:21:31,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:21:30" (1/3) ... [2021-02-24 04:21:31,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb80097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:21:31, skipping insertion in model container [2021-02-24 04:21:31,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:21:30" (2/3) ... [2021-02-24 04:21:31,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb80097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:21:31, skipping insertion in model container [2021-02-24 04:21:31,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:21:31" (3/3) ... [2021-02-24 04:21:31,177 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2021-02-24 04:21:31,185 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:21:31,192 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:21:31,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:21:31,241 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:21:31,242 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:21:31,242 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:21:31,242 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:21:31,242 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:21:31,242 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:21:31,243 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:21:31,243 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:21:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2021-02-24 04:21:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-24 04:21:31,274 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:21:31,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:21:31,276 INFO L428 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:21:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:21:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1199266181, now seen corresponding path program 1 times [2021-02-24 04:21:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:21:31,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207364827] [2021-02-24 04:21:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:21:31,385 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:21:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:21:31,535 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:21:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:21:31,687 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:21:31,742 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:21:31,742 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:21:31,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:21:31,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:21:31 BoogieIcfgContainer [2021-02-24 04:21:31,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:21:31,768 INFO L168 Benchmark]: Toolchain (without parser) took 1684.07 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 107.2 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:21:31,769 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 125.0 MB in the end (delta: 82.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:21:31,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:21:31,772 INFO L168 Benchmark]: Boogie Preprocessor took 71.35 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:21:31,773 INFO L168 Benchmark]: RCFGBuilder took 673.06 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 127.6 MB in the end (delta: -13.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:21:31,774 INFO L168 Benchmark]: TraceAbstraction took 597.11 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 107.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:21:31,785 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 151.0 MB. Free memory was 125.1 MB in the beginning and 125.0 MB in the end (delta: 82.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 317.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.35 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 673.06 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 127.6 MB in the end (delta: -13.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 597.11 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 107.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i = 1; [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 [L44] CALL, EXPR append(l, 1) [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; [L44] RET, EXPR append(l, 1) [L44] l = append(l, 1) [L45] CALL, EXPR append(l, 2) [L27] struct list *new_el; [L29] CALL, EXPR allocate_memory() [L22] return malloc(8U); [L29] RET, EXPR allocate_memory() [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; [L45] RET, EXPR append(l, 2) [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n [L50] COND TRUE l->next->next->n == 0 [L50] CALL err() [L10] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 2, 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=61occurred 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: No data available, 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...