/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:49:33,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:49:33,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:49:33,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:49:33,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:49:33,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:49:33,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:49:33,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:49:33,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:49:33,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:49:33,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:49:33,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:49:33,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:49:33,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:49:33,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:49:33,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:49:33,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:49:33,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:49:33,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:49:33,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:49:33,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:49:33,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:49:33,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:49:33,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:49:33,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:49:33,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:49:33,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:49:33,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:49:33,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:49:33,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:49:33,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:49:33,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:49:33,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:49:33,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:49:33,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:49:33,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:49:33,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:49:33,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:49:33,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:49:33,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:49:33,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:49:33,829 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 [2020-09-24 23:49:33,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:49:33,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:49:33,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:49:33,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:49:33,876 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:49:33,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:49:33,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:49:33,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:49:33,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:49:33,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:49:33,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:49:33,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:49:33,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:49:33,879 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:49:33,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:49:33,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:49:33,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:49:33,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:49:33,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:49:33,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:49:33,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:49:33,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:49:33,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:49:33,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:49:33,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:49:33,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:49:33,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:49:33,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:49:33,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:49:33,882 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.rcfgbuilder: Size of a code block -> SingleStatement 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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;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;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-24 23:49:34,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:49:34,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:49:34,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:49:34,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:49:34,388 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:49:34,389 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-24 23:49:34,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21b3929a/8d1c681e20cb4c7ea46f601d8d69d3fd/FLAGcec26fa94 [2020-09-24 23:49:35,005 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:49:35,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-24 23:49:35,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21b3929a/8d1c681e20cb4c7ea46f601d8d69d3fd/FLAGcec26fa94 [2020-09-24 23:49:35,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e21b3929a/8d1c681e20cb4c7ea46f601d8d69d3fd [2020-09-24 23:49:35,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:49:35,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:49:35,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:49:35,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:49:35,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:49:35,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1516d3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35, skipping insertion in model container [2020-09-24 23:49:35,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:49:35,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:49:35,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:49:35,624 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:49:35,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:49:35,669 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:49:35,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35 WrapperNode [2020-09-24 23:49:35,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:49:35,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:49:35,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:49:35,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:49:35,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (1/1) ... [2020-09-24 23:49:35,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:49:35,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:49:35,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:49:35,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:49:35,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (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 [2020-09-24 23:49:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:49:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:49:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 23:49:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-24 23:49:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-09-24 23:49:35,884 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 23:49:35,884 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-24 23:49:35,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:49:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 23:49:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 23:49:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 23:49:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 23:49:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:49:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 23:49:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-24 23:49:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 23:49:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 23:49:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 23:49:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-09-24 23:49:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 23:49:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 23:49:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 23:49:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-24 23:49:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:49:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:49:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:49:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 23:49:36,228 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:49:36,229 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 23:49:36,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:49:36 BoogieIcfgContainer [2020-09-24 23:49:36,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:49:36,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:49:36,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:49:36,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:49:36,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:49:35" (1/3) ... [2020-09-24 23:49:36,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd2e822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:49:36, skipping insertion in model container [2020-09-24 23:49:36,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:49:35" (2/3) ... [2020-09-24 23:49:36,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd2e822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:49:36, skipping insertion in model container [2020-09-24 23:49:36,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:49:36" (3/3) ... [2020-09-24 23:49:36,246 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-09-24 23:49:36,261 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:49:36,271 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:49:36,297 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:49:36,332 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:49:36,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:49:36,333 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:49:36,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:49:36,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:49:36,333 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:49:36,333 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:49:36,337 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:49:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-09-24 23:49:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 23:49:36,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:49:36,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:49:36,387 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:49:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:49:36,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times [2020-09-24 23:49:36,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:49:36,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524744540] [2020-09-24 23:49:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:49:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:36,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:36,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:37,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:37,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 23:49:37,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:49:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 23:49:37,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:37,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:49:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 23:49:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 23:49:37,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 23:49:37,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:49:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:37,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:37,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:49:37,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:37,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 23:49:37,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:37,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:49:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:37,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:49:37,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:49:37,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 23:49:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:37,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:37,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:49:37,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:49:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 23:49:37,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:49:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:49:37,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:49:37,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 23:49:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:49:37,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:37,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:49:37,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:49:37,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:49:37,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:49:37,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 23:49:37,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:49:37,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:49:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:49:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 23:49:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:49:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:49:38,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524744540] [2020-09-24 23:49:38,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:49:38,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 23:49:38,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834806720] [2020-09-24 23:49:38,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 23:49:38,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:49:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 23:49:38,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-24 23:49:38,089 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 12 states. [2020-09-24 23:49:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:49:39,371 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2020-09-24 23:49:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 23:49:39,373 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-09-24 23:49:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:49:39,392 INFO L225 Difference]: With dead ends: 168 [2020-09-24 23:49:39,392 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 23:49:39,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-24 23:49:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 23:49:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-24 23:49:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 23:49:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-09-24 23:49:39,466 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 33 [2020-09-24 23:49:39,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:49:39,467 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-09-24 23:49:39,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 23:49:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-09-24 23:49:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-24 23:49:39,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:49:39,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:49:39,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:49:39,476 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:49:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:49:39,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times [2020-09-24 23:49:39,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:49:39,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497488574] [2020-09-24 23:49:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:49:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 23:49:39,523 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 23:49:39,523 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 23:49:39,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:49:39,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 11:49:39 BoogieIcfgContainer [2020-09-24 23:49:39,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 23:49:39,561 INFO L168 Benchmark]: Toolchain (without parser) took 4231.58 ms. Allocated memory was 137.9 MB in the beginning and 249.0 MB in the end (delta: 111.1 MB). Free memory was 100.7 MB in the beginning and 151.6 MB in the end (delta: -50.9 MB). Peak memory consumption was 60.3 MB. Max. memory is 7.1 GB. [2020-09-24 23:49:39,562 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 23:49:39,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.39 ms. Allocated memory is still 137.9 MB. Free memory was 100.1 MB in the beginning and 89.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-24 23:49:39,564 INFO L168 Benchmark]: Boogie Preprocessor took 128.97 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 89.6 MB in the beginning and 176.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 23:49:39,565 INFO L168 Benchmark]: RCFGBuilder took 435.19 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 154.1 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-09-24 23:49:39,566 INFO L168 Benchmark]: TraceAbstraction took 3320.07 ms. Allocated memory was 199.8 MB in the beginning and 249.0 MB in the end (delta: 49.3 MB). Free memory was 153.4 MB in the beginning and 151.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-09-24 23:49:39,570 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 337.39 ms. Allocated memory is still 137.9 MB. Free memory was 100.1 MB in the beginning and 89.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.97 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 89.6 MB in the beginning and 176.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 435.19 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 154.1 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3320.07 ms. Allocated memory was 199.8 MB in the beginning and 249.0 MB in the end (delta: 49.3 MB). Free memory was 153.4 MB in the beginning and 151.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L58] CALL, EXPR nondet_tree() [L18] COND FALSE !(__VERIFIER_nondet_bool()) [L21] struct node *n = (struct node *)malloc(sizeof(struct node)); [L22] n->data = __VERIFIER_nondet_int() [L23] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; [L23] RET, EXPR nondet_tree() [L23] n->left = nondet_tree() [L24] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; [L24] RET, EXPR nondet_tree() [L24] n->right = nondet_tree() [L25] return n; [L58] RET, EXPR nondet_tree() [L58] CALL task(nondet_tree()) [L53] CALL, EXPR max(n) [L30] COND FALSE !(!n) [L33] EXPR n->left [L33] CALL, EXPR max(n->left) [L30] COND TRUE !n [L31] return -2147483648; [L33] RET, EXPR max(n->left) [L33] int a = max(n->left); [L34] EXPR n->right [L34] CALL, EXPR max(n->right) [L30] COND TRUE !n [L31] return -2147483648; [L34] RET, EXPR max(n->right) [L34] int b = max(n->right); [L35] COND TRUE a >= b [L35] return a; [L53] RET, EXPR max(n) [L53] int a = max(n); [L54] CALL check(n, a) [L41] COND TRUE \read(*n) [L42] EXPR n->data [L42] CALL __VERIFIER_assert(n->data <= a) [L9] COND TRUE !cond [L9] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 174 SDslu, 234 SDs, 0 SdLazy, 583 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 6272 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...