/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 [2020-09-25 06:38:30,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:38:30,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:38:30,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:38:30,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:38:30,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:38:30,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:38:30,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:38:30,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:38:30,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:38:30,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:38:30,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:38:30,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:38:30,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:38:30,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:38:30,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:38:30,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:38:30,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:38:30,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:38:30,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:38:30,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:38:30,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:38:30,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:38:30,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:38:30,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:38:30,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:38:30,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:38:30,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:38:30,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:38:30,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:38:30,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:38:30,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:38:30,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:38:30,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:38:30,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:38:30,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:38:30,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:38:30,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:38:30,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:38:30,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:38:30,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:38:30,818 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 [2020-09-25 06:38:30,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:38:30,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:38:30,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:38:30,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:38:30,879 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:38:30,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:38:30,879 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:38:30,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:38:30,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:38:30,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:38:30,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:38:30,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:38:30,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:38:30,882 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:38:30,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:38:30,883 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:38:30,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:38:30,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:38:30,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:38:30,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:38:30,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:38:30,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:38:30,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:38:30,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:38:30,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:38:30,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:38:30,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:38:30,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:38:30,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:38:30,886 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:38:31,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:38:31,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:38:31,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:38:31,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:38:31,395 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:38:31,396 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 06:38:31,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e98e30ec/fb0a399b27a94537886283bdbb786061/FLAGff0bbe0ee [2020-09-25 06:38:32,033 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:38:32,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 06:38:32,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e98e30ec/fb0a399b27a94537886283bdbb786061/FLAGff0bbe0ee [2020-09-25 06:38:32,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e98e30ec/fb0a399b27a94537886283bdbb786061 [2020-09-25 06:38:32,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:38:32,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:38:32,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:38:32,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:38:32,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:38:32,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@411e9963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32, skipping insertion in model container [2020-09-25 06:38:32,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:38:32,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:38:32,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:38:32,663 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:38:32,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:38:32,705 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:38:32,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32 WrapperNode [2020-09-25 06:38:32,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:38:32,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:38:32,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:38:32,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:38:32,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (1/1) ... [2020-09-25 06:38:32,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:38:32,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:38:32,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:38:32,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:38:32,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (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 [2020-09-25 06:38:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:38:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:38:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:38:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-25 06:38:32,910 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-09-25 06:38:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 06:38:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-25 06:38:32,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:38:32,911 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 06:38:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 06:38:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:38:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 06:38:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:38:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:38:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-25 06:38:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 06:38:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 06:38:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 06:38:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-09-25 06:38:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 06:38:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 06:38:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 06:38:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-25 06:38:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:38:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:38:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:38:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 06:38:33,288 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:38:33,288 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 06:38:33,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:38:33 BoogieIcfgContainer [2020-09-25 06:38:33,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:38:33,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:38:33,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:38:33,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:38:33,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:38:32" (1/3) ... [2020-09-25 06:38:33,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c27301e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:38:33, skipping insertion in model container [2020-09-25 06:38:33,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:38:32" (2/3) ... [2020-09-25 06:38:33,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c27301e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:38:33, skipping insertion in model container [2020-09-25 06:38:33,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:38:33" (3/3) ... [2020-09-25 06:38:33,307 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-09-25 06:38:33,320 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:38:33,346 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:38:33,374 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:38:33,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:38:33,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:38:33,408 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:38:33,408 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:38:33,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:38:33,409 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:38:33,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:38:33,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:38:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-09-25 06:38:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 06:38:33,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:38:33,444 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] [2020-09-25 06:38:33,444 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:38:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:38:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times [2020-09-25 06:38:33,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:38:33,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093662799] [2020-09-25 06:38:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:38:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:33,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:33,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:34,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:34,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 06:38:34,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:38:34,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-09-25 06:38:34,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:34,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 06:38:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:38:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 06:38:34,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:38:34,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:38:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:34,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:34,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:34,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:38:34,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:38:34,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 06:38:34,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:34,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:34,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:38:34,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:38:34,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:38:34,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:38:34,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 06:38:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:34,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:38:34,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:38:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 06:38:34,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:34,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:38:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:38:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:38:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:38:34,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 06:38:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:34,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:34,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:35,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:35,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:38:35,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:38:35,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 06:38:35,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:35,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:35,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:38:35,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:38:35,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:38:35,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:38:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:38:35,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093662799] [2020-09-25 06:38:35,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:38:35,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 06:38:35,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390159506] [2020-09-25 06:38:35,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 06:38:35,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:38:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 06:38:35,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 06:38:35,079 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 10 states. [2020-09-25 06:38:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:38:36,075 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-09-25 06:38:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 06:38:36,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-09-25 06:38:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:38:36,095 INFO L225 Difference]: With dead ends: 134 [2020-09-25 06:38:36,095 INFO L226 Difference]: Without dead ends: 74 [2020-09-25 06:38:36,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-25 06:38:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-25 06:38:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-09-25 06:38:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 06:38:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-09-25 06:38:36,166 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 33 [2020-09-25 06:38:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:38:36,167 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-09-25 06:38:36,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 06:38:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-09-25 06:38:36,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-25 06:38:36,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:38:36,172 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-25 06:38:36,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:38:36,173 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:38:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:38:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1181568947, now seen corresponding path program 1 times [2020-09-25 06:38:36,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:38:36,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218515066] [2020-09-25 06:38:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:38:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:36,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:36,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:37,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:37,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 06:38:37,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:38:37,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1320 [2020-09-25 06:38:37,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:37,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:37,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 06:38:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:38:37,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 06:38:37,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:38:37,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:38:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:37,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:37,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:37,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:38:37,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:38:37,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 06:38:37,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:37,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:37,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:38:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:38:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:38:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:38:37,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 06:38:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:37,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:37,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 06:38:37,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:38:37,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 06:38:37,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:37,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:37,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 06:38:37,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:38:37,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 06:38:37,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:38:37,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 06:38:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:37,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:37,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:37,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:38:37,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:38:37,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 06:38:37,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:37,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:37,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:38:37,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:38:37,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:38:37,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:38:37,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 06:38:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:37,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:37,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:37,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:38:37,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:38:37,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 06:38:37,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:37,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:38:37,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:38:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:38:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:38:37,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 06:38:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:38:37,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:38:37,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:38:37,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:38:37,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:38:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 06:38:37,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:38:37,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:38:37,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:38:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 06:38:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:38:37,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:38:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 06:38:37,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218515066] [2020-09-25 06:38:37,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:38:37,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-25 06:38:37,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180089343] [2020-09-25 06:38:37,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 06:38:37,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:38:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 06:38:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:38:37,972 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 12 states. [2020-09-25 06:38:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:38:38,802 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-09-25 06:38:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 06:38:38,803 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-09-25 06:38:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:38:38,806 INFO L225 Difference]: With dead ends: 99 [2020-09-25 06:38:38,806 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 06:38:38,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-25 06:38:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 06:38:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-25 06:38:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 06:38:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-09-25 06:38:38,849 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 54 [2020-09-25 06:38:38,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:38:38,850 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-09-25 06:38:38,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 06:38:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-09-25 06:38:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 06:38:38,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:38:38,864 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] [2020-09-25 06:38:38,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:38:38,864 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:38:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:38:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times [2020-09-25 06:38:38,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:38:38,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016717988] [2020-09-25 06:38:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:38:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 06:38:38,912 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 06:38:38,912 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 06:38:38,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:38:38,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:38:38 BoogieIcfgContainer [2020-09-25 06:38:38,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:38:38,951 INFO L168 Benchmark]: Toolchain (without parser) took 6572.33 ms. Allocated memory was 139.5 MB in the beginning and 285.2 MB in the end (delta: 145.8 MB). Free memory was 102.4 MB in the beginning and 235.8 MB in the end (delta: -133.5 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-25 06:38:38,952 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 06:38:38,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.59 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 90.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-25 06:38:38,954 INFO L168 Benchmark]: Boogie Preprocessor took 124.12 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 90.9 MB in the beginning and 177.5 MB in the end (delta: -86.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 06:38:38,956 INFO L168 Benchmark]: RCFGBuilder took 465.29 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 154.5 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-25 06:38:38,957 INFO L168 Benchmark]: TraceAbstraction took 5650.47 ms. Allocated memory was 200.3 MB in the beginning and 285.2 MB in the end (delta: 84.9 MB). Free memory was 153.8 MB in the beginning and 235.8 MB in the end (delta: -82.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-09-25 06:38:38,961 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.59 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 90.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.12 ms. Allocated memory was 139.5 MB in the beginning and 200.3 MB in the end (delta: 60.8 MB). Free memory was 90.9 MB in the beginning and 177.5 MB in the end (delta: -86.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 465.29 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 154.5 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5650.47 ms. Allocated memory was 200.3 MB in the beginning and 285.2 MB in the end (delta: 84.9 MB). Free memory was 153.8 MB in the beginning and 235.8 MB in the end (delta: -82.0 MB). Peak memory consumption was 3.0 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: 5.5s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 269 SDslu, 351 SDs, 0 SdLazy, 882 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 13000 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 11/11 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...