/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/list-ext.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:59:30,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:59:30,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:59:30,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:59:30,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:59:30,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:59:30,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:59:30,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:59:30,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:59:30,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:59:30,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:59:30,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:59:30,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:59:30,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:59:30,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:59:30,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:59:30,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:59:30,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:59:30,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:59:30,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:59:30,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:59:30,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:59:30,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:59:30,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:59:30,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:59:30,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:59:30,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:59:30,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:59:30,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:59:30,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:59:30,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:59:30,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:59:30,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:59:30,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:59:30,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:59:30,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:59:30,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:59:30,411 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:59:30,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:59:30,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:59:30,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:59:30,413 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:59:30,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:59:30,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:59:30,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:59:30,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:59:30,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:59:30,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:59:30,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:59:30,415 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:59:30,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:59:30,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:59:30,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:59:30,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:59:30,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:59:30,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:59:30,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:59:30,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:59:30,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:59:30,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:59:30,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:59:30,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:59:30,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:59:30,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:59:30,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:59:30,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:59:30,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:59:30,822 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:59:30,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/list-ext.i [2020-12-22 03:59:30,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f7ba396/406ce7a867884281a53510ddb2a11c50/FLAG7db4b1cd3 [2020-12-22 03:59:31,666 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:59:31,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext.i [2020-12-22 03:59:31,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f7ba396/406ce7a867884281a53510ddb2a11c50/FLAG7db4b1cd3 [2020-12-22 03:59:31,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66f7ba396/406ce7a867884281a53510ddb2a11c50 [2020-12-22 03:59:31,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:59:31,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:59:31,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:31,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:59:31,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:59:31,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:31" (1/1) ... [2020-12-22 03:59:31,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578e3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:31, skipping insertion in model container [2020-12-22 03:59:31,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:59:31" (1/1) ... [2020-12-22 03:59:32,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:59:32,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:59:32,380 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/list-ext.i[23551,23564] [2020-12-22 03:59:32,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:32,415 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:59:32,513 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/list-ext.i[23551,23564] [2020-12-22 03:59:32,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:59:32,595 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:59:32,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32 WrapperNode [2020-12-22 03:59:32,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:59:32,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:32,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:59:32,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:59:32,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:59:32,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:59:32,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:59:32,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:59:32,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (1/1) ... [2020-12-22 03:59:32,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:59:32,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:59:32,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:59:32,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:59:32,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (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 03:59:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:59:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:59:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:59:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:59:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:59:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:59:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:59:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:59:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:59:32,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:59:33,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:59:33,393 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-22 03:59:33,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:33 BoogieIcfgContainer [2020-12-22 03:59:33,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:59:33,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:59:33,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:59:33,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:59:33,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:59:31" (1/3) ... [2020-12-22 03:59:33,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36954130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:33, skipping insertion in model container [2020-12-22 03:59:33,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:59:32" (2/3) ... [2020-12-22 03:59:33,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36954130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:59:33, skipping insertion in model container [2020-12-22 03:59:33,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:33" (3/3) ... [2020-12-22 03:59:33,404 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext.i [2020-12-22 03:59:33,411 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:59:33,416 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:59:33,438 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:59:33,466 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:59:33,467 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:59:33,467 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:59:33,467 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:59:33,467 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:59:33,468 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:59:33,468 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:59:33,468 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:59:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-22 03:59:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:59:33,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:33,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:33,493 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1648325711, now seen corresponding path program 1 times [2020-12-22 03:59:33,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:33,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817304946] [2020-12-22 03:59:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:59:33,674 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 03:59:33,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817304946] [2020-12-22 03:59:33,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:59:33,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:59:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409869646] [2020-12-22 03:59:33,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:59:33,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:59:33,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:59:33,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:59:33,700 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-22 03:59:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:59:33,719 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2020-12-22 03:59:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:59:33,721 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-22 03:59:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:59:33,731 INFO L225 Difference]: With dead ends: 55 [2020-12-22 03:59:33,731 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 03:59:33,735 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 03:59:33,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 03:59:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 03:59:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 03:59:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-22 03:59:33,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2020-12-22 03:59:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:59:33,773 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-22 03:59:33,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:59:33,774 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-22 03:59:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 03:59:33,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:59:33,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:59:33,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:59:33,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:59:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:59:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1013764981, now seen corresponding path program 1 times [2020-12-22 03:59:33,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:59:33,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275604594] [2020-12-22 03:59:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:59:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:59:33,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:59:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:59:33,862 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:59:33,896 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:59:33,896 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:59:33,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:59:33,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:59:33 BoogieIcfgContainer [2020-12-22 03:59:33,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:59:33,970 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:59:33,971 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:59:33,971 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:59:33,971 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:59:33" (3/4) ... [2020-12-22 03:59:33,975 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:59:34,058 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-ext-properties/list-ext.i-witness.graphml [2020-12-22 03:59:34,058 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:59:34,061 INFO L168 Benchmark]: Toolchain (without parser) took 2076.38 ms. Allocated memory is still 164.6 MB. Free memory was 137.9 MB in the beginning and 98.6 MB in the end (delta: 39.3 MB). Peak memory consumption was 39.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:34,062 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 164.6 MB. Free memory is still 136.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:59:34,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 611.01 ms. Allocated memory is still 164.6 MB. Free memory was 137.6 MB in the beginning and 114.8 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:34,064 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.23 ms. Allocated memory is still 164.6 MB. Free memory was 114.8 MB in the beginning and 112.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:34,065 INFO L168 Benchmark]: Boogie Preprocessor took 35.22 ms. Allocated memory is still 164.6 MB. Free memory was 112.7 MB in the beginning and 111.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:34,066 INFO L168 Benchmark]: RCFGBuilder took 701.21 ms. Allocated memory is still 164.6 MB. Free memory was 111.2 MB in the beginning and 124.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:34,069 INFO L168 Benchmark]: TraceAbstraction took 572.90 ms. Allocated memory is still 164.6 MB. Free memory was 123.7 MB in the beginning and 100.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:34,073 INFO L168 Benchmark]: Witness Printer took 87.58 ms. Allocated memory is still 164.6 MB. Free memory was 100.7 MB in the beginning and 98.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:59:34,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 164.6 MB. Free memory is still 136.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 611.01 ms. Allocated memory is still 164.6 MB. Free memory was 137.6 MB in the beginning and 114.8 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 60.23 ms. Allocated memory is still 164.6 MB. Free memory was 114.8 MB in the beginning and 112.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.22 ms. Allocated memory is still 164.6 MB. Free memory was 112.7 MB in the beginning and 111.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 701.21 ms. Allocated memory is still 164.6 MB. Free memory was 111.2 MB in the beginning and 124.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 572.90 ms. Allocated memory is still 164.6 MB. Free memory was 123.7 MB in the beginning and 100.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Witness Printer took 87.58 ms. Allocated memory is still 164.6 MB. Free memory was 100.7 MB in the beginning and 98.6 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: 568]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int i = 0; [L533] int y = 0; [L534] List a = (List) malloc(sizeof(struct node)); [L535] COND FALSE !(a == 0) [L536] List t; [L537] List p = a; [L538] i < 10 && __VERIFIER_nondet_int() [L538] i < 10 && __VERIFIER_nondet_int() [L538] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L546] y < 10 && __VERIFIER_nondet_int() [L546] y < 10 && __VERIFIER_nondet_int() [L546] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L554] p->h = 3 [L555] p->n = 0 [L556] i = 0 [L557] y = 0 [L558] p = a [L559] EXPR p->h [L559] COND FALSE !(p->h == 1) [L563] EXPR p->h [L563] COND FALSE !(p->h == 2) [L567] EXPR p->h [L567] COND TRUE p->h != 3 || (i + y) < 20 [L568] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 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=33occurred 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, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 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...