/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -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-eb0fd7c [2020-09-21 11:23:28,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:28,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:28,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:28,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:28,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:28,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:28,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:28,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:28,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:28,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:28,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:28,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:28,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:28,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:28,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:28,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:28,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:28,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:28,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:28,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:28,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:28,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:28,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:28,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:28,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:28,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:28,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:28,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:28,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:28,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:28,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:28,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:28,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:28,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:28,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:28,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:28,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:28,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:28,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:28,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:28,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:23:28,275 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:28,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:28,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:28,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:28,278 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:28,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:28,279 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:28,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:28,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:28,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:28,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:28,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:28,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:28,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:28,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:28,282 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:28,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:28,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:28,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:28,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:28,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:28,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:28,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:28,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:28,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:28,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:28,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:28,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:28,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:28,285 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:28,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:28,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:28,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:28,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:28,798 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:28,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-09-21 11:23:28,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4264d83c/d2ca74686d2544ae814b1e4dcfdde4e5/FLAG2ea037b54 [2020-09-21 11:23:29,418 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:29,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-09-21 11:23:29,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4264d83c/d2ca74686d2544ae814b1e4dcfdde4e5/FLAG2ea037b54 [2020-09-21 11:23:29,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d4264d83c/d2ca74686d2544ae814b1e4dcfdde4e5 [2020-09-21 11:23:29,764 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:29,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:29,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:29,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:29,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:29,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:29" (1/1) ... [2020-09-21 11:23:29,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d7fa3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:29, skipping insertion in model container [2020-09-21 11:23:29,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:29" (1/1) ... [2020-09-21 11:23:29,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:29,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:30,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:30,051 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:30,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:30,087 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:30,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30 WrapperNode [2020-09-21 11:23:30,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:30,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:30,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:30,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:30,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... [2020-09-21 11:23:30,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... [2020-09-21 11:23:30,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... [2020-09-21 11:23:30,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... [2020-09-21 11:23:30,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... [2020-09-21 11:23:30,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... [2020-09-21 11:23:30,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... [2020-09-21 11:23:30,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:30,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:30,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:30,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:30,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 11:23:30,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-09-21 11:23:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-09-21 11:23:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-09-21 11:23:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:23:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-09-21 11:23:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-09-21 11:23:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:23:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-09-21 11:23:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:23:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:23:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:23:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:23:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:23:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:30,640 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:30,640 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:23:30,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:30 BoogieIcfgContainer [2020-09-21 11:23:30,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:30,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:30,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:30,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:30,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:29" (1/3) ... [2020-09-21 11:23:30,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449ffee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:30, skipping insertion in model container [2020-09-21 11:23:30,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:30" (2/3) ... [2020-09-21 11:23:30,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449ffee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:30, skipping insertion in model container [2020-09-21 11:23:30,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:30" (3/3) ... [2020-09-21 11:23:30,656 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-09-21 11:23:30,666 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:30,674 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:30,694 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:30,720 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:30,720 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:30,720 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:30,720 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:30,720 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:30,720 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:30,720 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:30,721 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-21 11:23:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 11:23:30,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:30,749 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] [2020-09-21 11:23:30,749 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:30,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1715006850, now seen corresponding path program 1 times [2020-09-21 11:23:30,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:30,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793612918] [2020-09-21 11:23:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:23:31,010 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:23:31,011 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:23:31,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:31,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:31 BoogieIcfgContainer [2020-09-21 11:23:31,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:31,045 INFO L168 Benchmark]: Toolchain (without parser) took 1277.37 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.5 MB in the beginning and 148.5 MB in the end (delta: -44.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:31,046 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:23:31,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.98 ms. Allocated memory is still 147.8 MB. Free memory was 103.9 MB in the beginning and 93.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:31,049 INFO L168 Benchmark]: Boogie Preprocessor took 131.69 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 181.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:31,050 INFO L168 Benchmark]: RCFGBuilder took 424.59 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 164.2 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:31,050 INFO L168 Benchmark]: TraceAbstraction took 394.10 ms. Allocated memory is still 203.9 MB. Free memory was 164.2 MB in the beginning and 148.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:31,058 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.98 ms. Allocated memory is still 147.8 MB. Free memory was 103.9 MB in the beginning and 93.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.69 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 181.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 424.59 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 164.2 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 394.10 ms. Allocated memory is still 203.9 MB. Free memory was 164.2 MB in the beginning and 148.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 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; [L37] struct list *l,m; [L38] l = &m [L39] l->next = 0 [L40] l->n = 0 [L42] CALL, EXPR append(l, 1) [L25] struct list *new_el; [L27] CALL, EXPR allocate_memory() [L20] return malloc(8U); [L27] RET, EXPR allocate_memory() [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; [L42] RET, EXPR append(l, 1) [L42] l = append(l, 1) [L43] CALL, EXPR append(l, 2) [L25] struct list *new_el; [L27] CALL, EXPR allocate_memory() [L20] return malloc(8U); [L27] RET, EXPR allocate_memory() [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; [L43] RET, EXPR append(l, 2) [L43] l = append(l, 2) [L48] EXPR l->next [L48] EXPR l->next->next [L48] EXPR l->next->next->n [L48] COND TRUE l->next->next->n == 0 [L48] CALL err() [L8] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, 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, 1 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...