/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/list-ext-properties/simple-ext.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:59:36,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:59:36,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:59:36,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:59:36,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:59:36,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:59:36,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:59:36,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:59:36,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:59:36,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:59:36,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:59:36,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:59:36,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:59:36,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:59:36,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:59:36,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:59:36,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:59:36,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:59:36,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:59:36,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:59:36,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:59:36,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:59:36,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:59:36,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:59:36,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:59:36,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:59:36,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:59:36,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:59:36,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:59:36,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:59:36,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:59:36,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:59:36,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:59:36,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:59:36,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:59:36,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:59:36,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:59:37,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:59:37,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:59:37,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:59:37,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:59:37,027 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:59:37,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:59:37,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:59:37,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:59:37,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:59:37,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:59:37,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:59:37,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:59:37,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:59:37,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:59:37,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:59:37,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:59:37,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:59:37,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:59:37,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:59:37,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:59:37,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:59:37,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:59:37,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:59:37,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:59:37,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:59:37,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:59:37,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:59:37,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:59:37,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:59:37,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:59:37,482 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:59:37,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-12-22 03:59:37,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85844c3d/fc7d2f19f3a741298c1077af35a578fe/FLAG44e642990 [2020-12-22 03:59:38,365 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:59:38,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/simple-ext.i [2020-12-22 03:59:38,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85844c3d/fc7d2f19f3a741298c1077af35a578fe/FLAG44e642990 [2020-12-22 03:59:38,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d85844c3d/fc7d2f19f3a741298c1077af35a578fe [2020-12-22 03:59:38,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:59:38,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:59:38,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:38,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:59:38,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:59:38,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:38" (1/1) ... [2020-12-22 03:59:38,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53387ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:38, skipping insertion in model container [2020-12-22 03:59:38,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:38" (1/1) ... [2020-12-22 03:59:38,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:59:38,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:59:39,075 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/list-ext-properties/simple-ext.i[23272,23285] [2020-12-22 03:59:39,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:39,096 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:59:39,172 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/list-ext-properties/simple-ext.i[23272,23285] [2020-12-22 03:59:39,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:39,252 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:59:39,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39 WrapperNode [2020-12-22 03:59:39,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:39,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:39,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:59:39,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:59:39,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:39,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:59:39,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:59:39,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:59:39,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (1/1) ... [2020-12-22 03:59:39,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:59:39,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:59:39,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:59:39,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:59:39,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (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 03:59:39,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:59:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:59:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:59:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:59:39,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:59:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:59:39,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:59:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:59:39,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:59:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:59:39,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:59:39,945 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 03:59:39,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:39 BoogieIcfgContainer [2020-12-22 03:59:39,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:59:39,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:59:39,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:59:39,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:59:39,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:59:38" (1/3) ... [2020-12-22 03:59:39,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ade51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:39, skipping insertion in model container [2020-12-22 03:59:39,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:39" (2/3) ... [2020-12-22 03:59:39,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ade51a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:39, skipping insertion in model container [2020-12-22 03:59:39,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:39" (3/3) ... [2020-12-22 03:59:39,957 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-ext.i [2020-12-22 03:59:39,965 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:59:39,971 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:59:39,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:59:40,021 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:59:40,022 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:59:40,022 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:59:40,022 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:59:40,022 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:59:40,023 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:59:40,023 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:59:40,023 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:59:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 03:59:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:59:40,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:40,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:40,047 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2119919114, now seen corresponding path program 1 times [2020-12-22 03:59:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:40,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761637164] [2020-12-22 03:59:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:40,244 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 03:59:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761637164] [2020-12-22 03:59:40,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:40,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:59:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116143348] [2020-12-22 03:59:40,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:59:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:40,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:59:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:59:40,306 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-22 03:59:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:40,324 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2020-12-22 03:59:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:59:40,326 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 03:59:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:40,335 INFO L225 Difference]: With dead ends: 35 [2020-12-22 03:59:40,336 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 03:59:40,339 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 03:59:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 03:59:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 03:59:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 03:59:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-22 03:59:40,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2020-12-22 03:59:40,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:40,377 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-22 03:59:40,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:59:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-22 03:59:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:59:40,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:40,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:40,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:59:40,378 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash -624122565, now seen corresponding path program 1 times [2020-12-22 03:59:40,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:40,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496840141] [2020-12-22 03:59:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:59:40,450 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:59:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:59:40,507 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:59:40,539 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:59:40,539 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:59:40,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:59:40,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:59:40 BoogieIcfgContainer [2020-12-22 03:59:40,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:59:40,572 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:59:40,573 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:59:40,573 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:59:40,573 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:39" (3/4) ... [2020-12-22 03:59:40,576 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:59:40,623 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-ext-properties/simple-ext.i-witness.graphml [2020-12-22 03:59:40,623 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:59:40,626 INFO L168 Benchmark]: Toolchain (without parser) took 1946.42 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 120.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 5.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:40,626 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:59:40,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 574.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 103.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:40,628 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.00 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 101.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:40,629 INFO L168 Benchmark]: Boogie Preprocessor took 33.41 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 100.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:40,630 INFO L168 Benchmark]: RCFGBuilder took 591.37 ms. Allocated memory is still 151.0 MB. Free memory was 100.1 MB in the beginning and 80.9 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:40,630 INFO L168 Benchmark]: TraceAbstraction took 622.80 ms. Allocated memory is still 151.0 MB. Free memory was 80.5 MB in the beginning and 122.7 MB in the end (delta: -42.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:59:40,631 INFO L168 Benchmark]: Witness Printer took 50.55 ms. Allocated memory is still 151.0 MB. Free memory was 122.7 MB in the beginning and 120.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:40,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 574.27 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 103.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 66.00 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 101.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.41 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 100.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 591.37 ms. Allocated memory is still 151.0 MB. Free memory was 100.1 MB in the beginning and 80.9 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 622.80 ms. Allocated memory is still 151.0 MB. Free memory was 80.5 MB in the beginning and 122.7 MB in the end (delta: -42.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 50.55 ms. Allocated memory is still 151.0 MB. Free memory was 122.7 MB in the beginning and 120.6 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: 551]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] int i = 0; [L537] i < 30 && __VERIFIER_nondet_int() [L537] i < 30 && __VERIFIER_nondet_int() [L537] COND FALSE !(i < 30 && __VERIFIER_nondet_int()) [L545] p->h = i [L546] p->n = 0 [L547] p = a [L548] i = 0 [L549] COND TRUE p!=0 [L550] EXPR p->h [L550] COND TRUE p->h != 1 [L551] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 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: 28 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=23occurred 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, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 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...