/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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 13:25:28,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:25:28,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:25:28,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:25:28,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:25:28,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:25:28,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:25:28,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:25:28,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:25:28,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:25:28,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:25:28,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:25:28,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:25:28,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:25:28,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:25:28,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:25:28,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:25:28,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:25:28,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:25:28,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:25:28,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:25:28,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:25:28,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:25:28,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:25:28,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:25:28,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:25:28,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:25:28,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:25:28,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:25:28,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:25:28,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:25:28,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:25:28,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:25:28,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:25:28,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:25:28,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:25:28,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:25:28,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:25:28,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:25:28,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:25:28,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:25:28,918 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 13:25:28,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:25:28,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:25:28,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:25:28,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:25:28,962 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:25:28,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:25:28,963 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:25:28,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:25:28,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:25:28,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:25:28,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:25:28,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:25:28,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:25:28,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:25:28,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:25:28,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:25:28,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:25:28,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:25:28,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:25:28,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:25:28,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:25:28,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:25:28,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:25:28,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:25:28,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:25:28,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:25:28,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:25:28,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:25:28,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:25:28,967 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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:25:29,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:25:29,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:25:29,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:25:29,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:25:29,435 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:25:29,436 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 13:25:29,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f52b8c597/c34e6f9142b743d5848de7c8159efb85/FLAGaa977ee02 [2020-09-25 13:25:30,029 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:25:30,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 13:25:30,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f52b8c597/c34e6f9142b743d5848de7c8159efb85/FLAGaa977ee02 [2020-09-25 13:25:30,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f52b8c597/c34e6f9142b743d5848de7c8159efb85 [2020-09-25 13:25:30,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:25:30,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:25:30,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:25:30,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:25:30,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:25:30,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,368 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 25.09 01:25:30, skipping insertion in model container [2020-09-25 13:25:30,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:25:30,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:25:30,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:25:30,694 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:25:30,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:25:30,740 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:25:30,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30 WrapperNode [2020-09-25 13:25:30,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:25:30,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:25:30,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:25:30,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:25:30,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... [2020-09-25 13:25:30,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:25:30,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:25:30,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:25:30,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:25:30,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:25:30,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:25:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:25:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 13:25:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-25 13:25:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-09-25 13:25:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 13:25:30,965 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-25 13:25:30,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:25:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 13:25:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 13:25:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:25:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 13:25:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:25:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 13:25:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-25 13:25:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 13:25:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 13:25:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 13:25:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-09-25 13:25:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 13:25:30,969 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 13:25:30,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 13:25:30,970 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-25 13:25:30,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:25:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:25:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:25:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 13:25:31,352 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:25:31,353 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 13:25:31,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:25:31 BoogieIcfgContainer [2020-09-25 13:25:31,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:25:31,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:25:31,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:25:31,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:25:31,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:25:30" (1/3) ... [2020-09-25 13:25:31,365 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 25.09 01:25:31, skipping insertion in model container [2020-09-25 13:25:31,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:25:30" (2/3) ... [2020-09-25 13:25:31,366 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 25.09 01:25:31, skipping insertion in model container [2020-09-25 13:25:31,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:25:31" (3/3) ... [2020-09-25 13:25:31,368 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-09-25 13:25:31,380 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:25:31,390 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:25:31,411 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:25:31,441 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:25:31,441 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:25:31,441 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:25:31,442 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:25:31,442 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:25:31,442 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:25:31,442 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:25:31,442 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:25:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-09-25 13:25:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 13:25:31,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:25:31,481 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 13:25:31,482 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:25:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:25:31,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times [2020-09-25 13:25:31,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:25:31,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524744540] [2020-09-25 13:25:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:25:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:31,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:32,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:32,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 13:25:32,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:25:32,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-09-25 13:25:32,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:32,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:25:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 13:25:32,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 13:25:32,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 13:25:32,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:25:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:32,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:32,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:25:32,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:32,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 13:25:32,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:32,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:25:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:25:32,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:25:32,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 13:25:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:32,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:32,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:32,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:25:32,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:32,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 13:25:32,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:32,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:32,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:25:32,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:32,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:25:32,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:32,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 13:25:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:32,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:32,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:32,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:25:32,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:32,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 13:25:32,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:32,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:25:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 13:25:32,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:33,010 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 13:25:33,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524744540] [2020-09-25 13:25:33,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:25:33,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 13:25:33,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512912947] [2020-09-25 13:25:33,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:25:33,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:25:33,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:25:33,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:25:33,044 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 9 states. [2020-09-25 13:25:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:25:33,878 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-09-25 13:25:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 13:25:33,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-25 13:25:33,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:25:33,896 INFO L225 Difference]: With dead ends: 134 [2020-09-25 13:25:33,897 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 13:25:33,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-25 13:25:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 13:25:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-09-25 13:25:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 13:25:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-09-25 13:25:33,965 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 33 [2020-09-25 13:25:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:25:33,965 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-09-25 13:25:33,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:25:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-09-25 13:25:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 13:25:33,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:25:33,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-25 13:25:33,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:25:33,972 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:25:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:25:33,972 INFO L82 PathProgramCache]: Analyzing trace with hash -297358705, now seen corresponding path program 1 times [2020-09-25 13:25:33,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:25:33,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143834160] [2020-09-25 13:25:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:25:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:34,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:35,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:35,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 13:25:35,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:25:35,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-09-25 13:25:35,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:35,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 13:25:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 13:25:35,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 13:25:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:35,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:25:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:35,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:35,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:35,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:25:35,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 13:25:35,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:35,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:25:35,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:35,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:25:35,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:25:35,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 13:25:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:35,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:35,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:35,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:25:35,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:35,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 13:25:35,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:35,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 13:25:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 13:25:35,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 13:25:35,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 13:25:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:35,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:35,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:35,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:35,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 13:25:35,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 13:25:35,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-25 13:25:35,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:35,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:25:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:35,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 13:25:35,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:35,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 13:25:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:35,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:35,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:35,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:25:35,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:35,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 13:25:35,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:35,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:25:35,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:35,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:25:35,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:35,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 13:25:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:25:35,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:25:35,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:25:35,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:25:35,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:25:35,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 13:25:35,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:25:35,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:25:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:25:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:25:35,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:25:35,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:25:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 13:25:35,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143834160] [2020-09-25 13:25:35,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:25:35,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 13:25:35,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781938657] [2020-09-25 13:25:35,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 13:25:35,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:25:35,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 13:25:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 13:25:35,665 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 10 states. [2020-09-25 13:25:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:25:36,309 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2020-09-25 13:25:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 13:25:36,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-09-25 13:25:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:25:36,313 INFO L225 Difference]: With dead ends: 105 [2020-09-25 13:25:36,313 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 13:25:36,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-25 13:25:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 13:25:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-25 13:25:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 13:25:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-09-25 13:25:36,332 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 56 [2020-09-25 13:25:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:25:36,332 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-09-25 13:25:36,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 13:25:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-09-25 13:25:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 13:25:36,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:25:36,340 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 13:25:36,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:25:36,343 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:25:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:25:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times [2020-09-25 13:25:36,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:25:36,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503879990] [2020-09-25 13:25:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:25:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:25:36,420 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:25:36,421 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:25:36,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:25:36,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:25:36 BoogieIcfgContainer [2020-09-25 13:25:36,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:25:36,480 INFO L168 Benchmark]: Toolchain (without parser) took 6125.02 ms. Allocated memory was 140.0 MB in the beginning and 280.5 MB in the end (delta: 140.5 MB). Free memory was 102.8 MB in the beginning and 238.6 MB in the end (delta: -135.8 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:36,481 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:25:36,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:36,483 INFO L168 Benchmark]: Boogie Preprocessor took 131.53 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 91.8 MB in the beginning and 180.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:36,484 INFO L168 Benchmark]: RCFGBuilder took 485.13 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 157.3 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-09-25 13:25:36,486 INFO L168 Benchmark]: TraceAbstraction took 5113.92 ms. Allocated memory was 203.4 MB in the beginning and 280.5 MB in the end (delta: 77.1 MB). Free memory was 156.7 MB in the beginning and 238.6 MB in the end (delta: -81.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:25:36,495 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 384.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.53 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 91.8 MB in the beginning and 180.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 485.13 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 157.3 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5113.92 ms. Allocated memory was 203.4 MB in the beginning and 280.5 MB in the end (delta: 77.1 MB). Free memory was 156.7 MB in the beginning and 238.6 MB in the end (delta: -81.9 MB). There was no memory consumed. 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: 4.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 261 SDslu, 325 SDs, 0 SdLazy, 735 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 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, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 13637 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 13/13 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...