/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-properties/simple-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:49:08,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:49:08,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:49:08,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:49:08,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:49:08,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:49:08,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:49:08,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:49:08,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:49:08,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:49:08,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:49:08,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:49:08,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:49:08,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:49:08,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:49:08,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:49:08,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:49:08,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:49:08,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:49:08,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:49:09,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:49:09,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:49:09,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:49:09,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:49:09,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:49:09,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:49:09,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:49:09,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:49:09,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:49:09,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:49:09,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:49:09,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:49:09,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:49:09,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:49:09,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:49:09,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:49:09,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:49:09,065 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:49:09,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:49:09,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:49:09,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:49:09,068 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:49:09,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:49:09,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:49:09,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:49:09,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:49:09,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:49:09,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:49:09,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:49:09,070 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:49:09,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:49:09,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:49:09,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:49:09,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:49:09,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:49:09,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:49:09,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:49:09,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:49:09,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:49:09,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:49:09,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:49:09,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:49:09,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:49:09,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:49:09,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:49:09,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:49:09,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:49:09,568 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:49:09,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-1.i [2020-12-22 03:49:09,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2308e0f/407080de39384629824c55b241aeda59/FLAGee8728e8b [2020-12-22 03:49:10,741 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:49:10,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-1.i [2020-12-22 03:49:10,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2308e0f/407080de39384629824c55b241aeda59/FLAGee8728e8b [2020-12-22 03:49:10,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c2308e0f/407080de39384629824c55b241aeda59 [2020-12-22 03:49:10,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:49:10,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:49:10,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:49:10,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:49:10,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:49:10,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:49:10" (1/1) ... [2020-12-22 03:49:10,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d21a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:10, skipping insertion in model container [2020-12-22 03:49:10,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:49:10" (1/1) ... [2020-12-22 03:49:10,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:49:11,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:49:11,579 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-properties/simple-1.i[23237,23250] [2020-12-22 03:49:11,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:49:11,613 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:49:11,717 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-properties/simple-1.i[23237,23250] [2020-12-22 03:49:11,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:49:11,825 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:49:11,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11 WrapperNode [2020-12-22 03:49:11,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:49:11,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:49:11,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:49:11,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:49:11,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:11,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:11,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:49:11,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:49:11,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:49:11,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:49:11,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:11,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:11,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:11,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:12,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:12,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:12,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (1/1) ... [2020-12-22 03:49:12,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:49:12,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:49:12,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:49:12,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:49:12,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (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 03:49:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:49:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:49:12,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:49:12,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:49:12,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:49:12,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:49:12,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:49:12,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:49:12,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:49:12,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:49:12,775 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-22 03:49:12,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:49:12 BoogieIcfgContainer [2020-12-22 03:49:12,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:49:12,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:49:12,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:49:12,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:49:12,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:49:10" (1/3) ... [2020-12-22 03:49:12,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7205a1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:49:12, skipping insertion in model container [2020-12-22 03:49:12,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:49:11" (2/3) ... [2020-12-22 03:49:12,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7205a1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:49:12, skipping insertion in model container [2020-12-22 03:49:12,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:49:12" (3/3) ... [2020-12-22 03:49:12,800 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2020-12-22 03:49:12,810 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:49:12,819 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:49:12,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:49:12,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:49:12,887 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:49:12,887 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:49:12,887 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:49:12,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:49:12,888 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:49:12,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:49:12,888 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:49:12,908 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 03:49:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:49:12,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:49:12,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:49:12,918 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:49:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:49:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2020-12-22 03:49:12,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:49:12,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648863969] [2020-12-22 03:49:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:49:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:49:13,166 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 03:49:13,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648863969] [2020-12-22 03:49:13,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:49:13,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:49:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792267569] [2020-12-22 03:49:13,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:49:13,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:49:13,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:49:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:49:13,206 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-22 03:49:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:49:13,232 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-12-22 03:49:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:49:13,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 03:49:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:49:13,248 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:49:13,248 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:49:13,253 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 03:49:13,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:49:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:49:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:49:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 03:49:13,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-22 03:49:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:49:13,305 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 03:49:13,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:49:13,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 03:49:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:49:13,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:49:13,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:49:13,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:49:13,308 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:49:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:49:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2020-12-22 03:49:13,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:49:13,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081476066] [2020-12-22 03:49:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:49:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:49:13,477 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 03:49:13,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081476066] [2020-12-22 03:49:13,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:49:13,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:49:13,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611783688] [2020-12-22 03:49:13,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:49:13,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:49:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:49:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:49:13,483 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-12-22 03:49:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:49:13,602 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-22 03:49:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:49:13,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 03:49:13,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:49:13,605 INFO L225 Difference]: With dead ends: 29 [2020-12-22 03:49:13,605 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 03:49:13,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:49:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 03:49:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-12-22 03:49:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 03:49:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-22 03:49:13,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2020-12-22 03:49:13,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:49:13,615 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-22 03:49:13,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:49:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-22 03:49:13,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:49:13,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:49:13,617 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:49:13,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:49:13,618 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:49:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:49:13,619 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2020-12-22 03:49:13,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:49:13,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799641296] [2020-12-22 03:49:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:49:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:49:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:49:13,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799641296] [2020-12-22 03:49:13,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278534907] [2020-12-22 03:49:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:49:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:49:13,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 03:49:13,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:49:14,093 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 03:49:14,095 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:49:14,108 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:49:14,114 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 03:49:14,115 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:49:14,126 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:49:14,128 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:49:14,129 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-12-22 03:49:14,190 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 03:49:14,193 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:49:14,203 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:49:14,209 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 03:49:14,212 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:49:14,242 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:49:14,243 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:49:14,244 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-12-22 03:49:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:49:14,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:49:14,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-22 03:49:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912012455] [2020-12-22 03:49:14,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:49:14,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:49:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:49:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:49:14,255 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-12-22 03:49:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:49:14,424 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-22 03:49:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:49:14,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 03:49:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:49:14,427 INFO L225 Difference]: With dead ends: 33 [2020-12-22 03:49:14,427 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 03:49:14,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:49:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 03:49:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2020-12-22 03:49:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 03:49:14,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 03:49:14,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-12-22 03:49:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:49:14,440 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 03:49:14,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:49:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 03:49:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 03:49:14,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:49:14,442 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:49:14,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 03:49:14,656 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:49:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:49:14,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2020-12-22 03:49:14,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:49:14,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083760606] [2020-12-22 03:49:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:49:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:49:14,748 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:49:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:49:14,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:49:14,833 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:49:14,834 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:49:14,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:49:14,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:49:14 BoogieIcfgContainer [2020-12-22 03:49:14,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:49:14,874 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:49:14,874 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:49:14,875 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:49:14,876 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:49:12" (3/4) ... [2020-12-22 03:49:14,879 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:49:14,946 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-properties/simple-1.i-witness.graphml [2020-12-22 03:49:14,946 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:49:14,948 INFO L168 Benchmark]: Toolchain (without parser) took 4028.22 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 111.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:49:14,949 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:49:14,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 904.57 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 103.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:49:14,951 INFO L168 Benchmark]: Boogie Procedure Inliner took 123.66 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 133.5 MB in the end (delta: -30.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:49:14,952 INFO L168 Benchmark]: Boogie Preprocessor took 79.93 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 131.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:49:14,953 INFO L168 Benchmark]: RCFGBuilder took 740.51 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 114.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-22 03:49:14,954 INFO L168 Benchmark]: TraceAbstraction took 2089.87 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 113.1 MB in the end (delta: 926.1 kB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:49:14,955 INFO L168 Benchmark]: Witness Printer took 72.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 111.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:49:14,959 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 904.57 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 103.1 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 123.66 ms. Allocated memory is still 151.0 MB. Free memory was 103.0 MB in the beginning and 133.5 MB in the end (delta: -30.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.93 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 131.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 740.51 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 114.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2089.87 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 113.1 MB in the end (delta: 926.1 kB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. * Witness Printer took 72.29 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 111.0 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: 549]: 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] a->h = 2 [L537] COND TRUE __VERIFIER_nondet_int() [L538] p->h = 1 [L539] t = (List) malloc(sizeof(struct node)) [L540] COND FALSE !(t == 0) [L541] p->n = t [L542] EXPR p->n [L542] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 [L545] p->n = 0 [L546] p = a [L547] COND TRUE p!=0 [L548] EXPR p->h [L548] COND TRUE p->h != 2 [L549] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 39 SDslu, 46 SDs, 0 SdLazy, 59 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 6 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...