/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:52:19,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:52:19,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:52:19,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:52:19,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:52:19,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:52:19,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:52:19,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:52:19,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:52:19,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:52:19,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:52:19,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:52:19,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:52:19,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:52:19,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:52:19,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:52:19,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:52:19,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:52:19,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:52:19,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:52:19,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:52:19,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:52:19,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:52:19,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:52:19,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:52:19,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:52:19,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:52:19,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:52:19,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 21:52:19,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:52:19,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:52:19,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:52:19,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:52:19,948 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:52:19,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:52:19,949 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:52:19,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:52:19,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:52:19,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:52:19,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:52:19,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:52:19,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:52:19,950 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:52:19,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:52:19,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:52:19,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:52:19,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:52:19,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:52:19,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:52:19,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:52:19,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:52:19,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:52:19,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:52:19,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:52:19,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:52:19,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:19,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:52:19,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:52:19,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 21:52:20,236 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:52:20,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:52:20,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:52:20,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:52:20,262 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:52:20,263 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-07-20 21:52:20,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d3907f9/ddf87a722fe04c12bc49049bf88f5419/FLAG576eaaef1 [2020-07-20 21:52:20,852 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:52:20,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-07-20 21:52:20,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d3907f9/ddf87a722fe04c12bc49049bf88f5419/FLAG576eaaef1 [2020-07-20 21:52:21,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d3907f9/ddf87a722fe04c12bc49049bf88f5419 [2020-07-20 21:52:21,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:52:21,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:52:21,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:52:21,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:52:21,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:52:21,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60cd2d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21, skipping insertion in model container [2020-07-20 21:52:21,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:52:21,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:52:21,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:52:21,417 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:52:21,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:52:21,451 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:52:21,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21 WrapperNode [2020-07-20 21:52:21,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:52:21,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:52:21,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:52:21,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:52:21,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (1/1) ... [2020-07-20 21:52:21,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:52:21,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:52:21,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:52:21,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:52:21,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (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 [2020-07-20 21:52:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:52:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:52:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-07-20 21:52:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-07-20 21:52:21,653 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-07-20 21:52:21,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:52:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:52:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 21:52:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-07-20 21:52:21,654 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-07-20 21:52:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 21:52:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-07-20 21:52:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:52:21,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 21:52:21,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:52:21,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:52:21,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 21:52:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:52:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:52:21,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:52:21,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:52:21,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:52:21,893 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:52:21,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:21 BoogieIcfgContainer [2020-07-20 21:52:21,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:52:21,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:52:21,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:52:21,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:52:21,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:52:21" (1/3) ... [2020-07-20 21:52:21,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc1272e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:21, skipping insertion in model container [2020-07-20 21:52:21,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:52:21" (2/3) ... [2020-07-20 21:52:21,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc1272e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:52:21, skipping insertion in model container [2020-07-20 21:52:21,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:52:21" (3/3) ... [2020-07-20 21:52:21,907 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-07-20 21:52:21,918 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:52:21,943 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:52:21,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:52:22,009 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:52:22,009 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:52:22,010 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:52:22,010 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:52:22,010 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:52:22,010 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:52:22,010 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:52:22,010 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:52:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 21:52:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 21:52:22,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:52:22,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:52:22,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:52:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:52:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1715006850, now seen corresponding path program 1 times [2020-07-20 21:52:22,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:52:22,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928710853] [2020-07-20 21:52:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:22,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:52:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:52:22,332 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:52:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:52:22,384 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:52:22,430 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:52:22,431 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:52:22,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:52:22,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:52:22 BoogieIcfgContainer [2020-07-20 21:52:22,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:52:22,694 INFO L168 Benchmark]: Toolchain (without parser) took 1485.62 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 103.4 MB in the beginning and 131.2 MB in the end (delta: -27.8 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:22,696 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:52:22,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.53 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 92.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:22,698 INFO L168 Benchmark]: Boogie Preprocessor took 123.45 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.7 MB in the beginning and 180.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:22,699 INFO L168 Benchmark]: RCFGBuilder took 321.28 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 163.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:22,700 INFO L168 Benchmark]: TraceAbstraction took 792.99 ms. Allocated memory is still 202.9 MB. Free memory was 163.6 MB in the beginning and 131.2 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:52:22,705 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.53 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 92.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.45 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.7 MB in the beginning and 180.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.28 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 163.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 792.99 ms. Allocated memory is still 202.9 MB. Free memory was 163.6 MB in the beginning and 131.2 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i = 1; VAL [\old(i)=3, i=1] [L37] struct list *l,m; [L38] l = &m [L39] l->next = 0 [L40] l->n = 0 VAL [i=1, l={12620:0}, m={12620:0}] [L42] CALL, EXPR append(l, 1) VAL [\old(n)=1, i=1, l={12620:0}] [L25] struct list *new_el; VAL [\old(n)=1, i=1, l={12620:0}, l={12620:0}, n=1] [L27] CALL, EXPR allocate_memory() VAL [i=1] [L20] return malloc(8U); VAL [\result={-1:0}, i=1, malloc(8U)={-1:0}] [L27] RET, EXPR allocate_memory() VAL [\old(n)=1, allocate_memory()={-1:0}, i=1, l={12620:0}, l={12620:0}, n=1] [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; VAL [\old(n)=1, \result={-1:0}, i=1, l={12620:0}, l={12620:0}, n=1, new_el={-1:0}] [L42] RET, EXPR append(l, 1) VAL [append(l, 1)={-1:0}, i=1, l={12620:0}, m={12620:0}] [L42] l = append(l, 1) [L43] CALL, EXPR append(l, 2) VAL [\old(n)=2, i=1, l={-1:0}] [L25] struct list *new_el; VAL [\old(n)=2, i=1, l={-1:0}, l={-1:0}, n=2] [L27] CALL, EXPR allocate_memory() VAL [i=1] [L20] return malloc(8U); VAL [\result={12618:0}, i=1, malloc(8U)={12618:0}] [L27] RET, EXPR allocate_memory() VAL [\old(n)=2, allocate_memory()={12618:0}, i=1, l={-1:0}, l={-1:0}, n=2] [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; VAL [\old(n)=2, \result={12618:0}, i=1, l={-1:0}, l={-1:0}, n=2, new_el={12618:0}] [L43] RET, EXPR append(l, 2) VAL [append(l, 2)={12618:0}, i=1, l={-1:0}, m={12620:0}] [L43] l = append(l, 2) [L48] EXPR l->next [L48] EXPR l->next->next [L48] EXPR l->next->next->n VAL [i=1, l={12618:0}, l->next={-1:0}, l->next->next={12620:0}, l->next->next->n=0, m={12620:0}] [L48] COND TRUE l->next->next->n == 0 [L48] CALL err() VAL [i=1] [L8] __VERIFIER_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...