/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:59:14,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:59:14,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:59:14,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:59:14,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:59:14,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:59:14,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:59:14,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:59:14,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:59:14,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:59:14,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:59:14,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:59:14,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:59:14,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:59:14,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:59:14,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:59:14,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:59:14,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:59:14,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:59:14,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:59:14,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:59:14,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:59:14,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:59:14,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:59:14,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 03:59:14,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 03:59:14,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 03:59:14,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 03:59:14,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 03:59:14,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 03:59:14,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:59:14,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:59:14,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:59:14,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:59:14,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:59:14,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:59:14,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:59:14,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:59:14,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:59:14,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:59:14,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:59:14,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:59:14,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:59:14,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:59:14,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:59:14,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:59:14,726 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:59:14,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:59:14,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:59:14,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:59:14,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:59:14,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:59:14,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:59:14,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:59:14,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:59:14,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:59:14,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:59:14,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:59:14,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:59:14,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:59:14,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:59:14,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:59:14,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:59:14,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:59:14,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:59:14,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:59:14,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:59:14,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:59:15,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:59:15,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:59:15,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:59:15,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:59:15,129 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:59:15,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i [2020-12-22 03:59:15,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b631d206/e70f4cf5924844ba9ab8d130c12a3f59/FLAG52c999980 [2020-12-22 03:59:15,885 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:59:15,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i [2020-12-22 03:59:15,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b631d206/e70f4cf5924844ba9ab8d130c12a3f59/FLAG52c999980 [2020-12-22 03:59:16,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b631d206/e70f4cf5924844ba9ab8d130c12a3f59 [2020-12-22 03:59:16,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:59:16,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:59:16,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:16,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:59:16,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:59:16,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@734c63f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16, skipping insertion in model container [2020-12-22 03:59:16,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:59:16,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:59:16,618 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i[22617,22630] [2020-12-22 03:59:16,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:16,648 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:59:16,719 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-2.i[22617,22630] [2020-12-22 03:59:16,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:16,775 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:59:16,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16 WrapperNode [2020-12-22 03:59:16,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:16,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:16,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:59:16,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:59:16,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:16,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:59:16,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:59:16,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:59:16,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (1/1) ... [2020-12-22 03:59:16,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:59:16,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:59:16,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:59:16,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:59:16,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (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 [2020-12-22 03:59:17,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:59:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:59:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:59:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:59:17,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:59:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:59:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:59:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:59:17,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:59:17,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:59:17,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:59:17,484 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-22 03:59:17,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:17 BoogieIcfgContainer [2020-12-22 03:59:17,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:59:17,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:59:17,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:59:17,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:59:17,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:59:16" (1/3) ... [2020-12-22 03:59:17,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133af906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:17, skipping insertion in model container [2020-12-22 03:59:17,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:16" (2/3) ... [2020-12-22 03:59:17,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133af906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:17, skipping insertion in model container [2020-12-22 03:59:17,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:17" (3/3) ... [2020-12-22 03:59:17,494 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-2.i [2020-12-22 03:59:17,500 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:59:17,505 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:59:17,525 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:59:17,556 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:59:17,556 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:59:17,556 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:59:17,557 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:59:17,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:59:17,557 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:59:17,557 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:59:17,557 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:59:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-22 03:59:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:59:17,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:17,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:17,582 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1041580535, now seen corresponding path program 1 times [2020-12-22 03:59:17,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:17,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091571867] [2020-12-22 03:59:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:59:17,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091571867] [2020-12-22 03:59:17,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:17,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:59:17,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070919947] [2020-12-22 03:59:17,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:59:17,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:59:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:59:17,889 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-22 03:59:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:17,914 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2020-12-22 03:59:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:59:17,916 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-22 03:59:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:17,941 INFO L225 Difference]: With dead ends: 47 [2020-12-22 03:59:17,941 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 03:59:17,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:59:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 03:59:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 03:59:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 03:59:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-22 03:59:17,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2020-12-22 03:59:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:17,986 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-22 03:59:17,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:59:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-22 03:59:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:59:17,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:17,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:17,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:59:17,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1993200173, now seen corresponding path program 1 times [2020-12-22 03:59:17,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:17,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047138004] [2020-12-22 03:59:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:59:18,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:59:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:59:18,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:59:18,106 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:59:18,107 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:59:18,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:59:18,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:59:18 BoogieIcfgContainer [2020-12-22 03:59:18,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:59:18,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:59:18,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:59:18,139 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:59:18,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:17" (3/4) ... [2020-12-22 03:59:18,142 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:59:18,189 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/forester-heap/sll-simple-white-blue-2.i-witness.graphml [2020-12-22 03:59:18,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:59:18,192 INFO L168 Benchmark]: Toolchain (without parser) took 2019.89 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 82.9 MB in the end (delta: 41.9 MB). Peak memory consumption was 41.4 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:18,192 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.9 MB in the beginning and 123.8 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:59:18,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 600.26 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 102.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:18,194 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.19 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 133.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:18,195 INFO L168 Benchmark]: Boogie Preprocessor took 31.90 ms. Allocated memory is still 151.0 MB. Free memory was 133.3 MB in the beginning and 131.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:18,196 INFO L168 Benchmark]: RCFGBuilder took 574.75 ms. Allocated memory is still 151.0 MB. Free memory was 131.7 MB in the beginning and 108.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:18,196 INFO L168 Benchmark]: TraceAbstraction took 650.51 ms. Allocated memory is still 151.0 MB. Free memory was 108.6 MB in the beginning and 85.0 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:18,197 INFO L168 Benchmark]: Witness Printer took 50.73 ms. Allocated memory is still 151.0 MB. Free memory was 85.0 MB in the beginning and 82.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:18,201 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 151.0 MB. Free memory was 123.9 MB in the beginning and 123.8 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 600.26 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 102.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 101.19 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 133.3 MB in the end (delta: -30.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.90 ms. Allocated memory is still 151.0 MB. Free memory was 133.3 MB in the beginning and 131.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 574.75 ms. Allocated memory is still 151.0 MB. Free memory was 131.7 MB in the beginning and 108.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 650.51 ms. Allocated memory is still 151.0 MB. Free memory was 108.6 MB in the beginning and 85.0 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Witness Printer took 50.73 ms. Allocated memory is still 151.0 MB. Free memory was 85.0 MB in the beginning and 82.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1053]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L999] SLL* head = malloc(sizeof(SLL)); [L1000] head->next = ((void*)0) [L1001] head->data = 0 [L1003] SLL* x = head; [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1016] COND TRUE __VERIFIER_nondet_int() [L1017] x = malloc(sizeof(SLL)) [L1018] x->data = 1 [L1019] x->next = head [L1020] head = x [L1040] x = head [L1043] EXPR x->data [L1043] COND FALSE !(x->data != 1) [L1049] EXPR x->next [L1049] x = x->next [L1050] COND TRUE \read(*x) [L1052] EXPR x->data [L1052] COND TRUE x->data != 1 [L1053] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...