/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 01:16:16,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 01:16:16,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 01:16:16,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 01:16:16,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 01:16:16,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 01:16:16,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 01:16:16,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 01:16:16,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 01:16:16,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 01:16:16,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 01:16:16,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 01:16:16,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 01:16:16,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 01:16:16,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 01:16:16,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 01:16:16,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 01:16:16,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 01:16:16,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 01:16:16,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 01:16:16,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 01:16:16,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 01:16:16,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 01:16:16,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 01:16:16,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 01:16:16,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 01:16:16,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 01:16:16,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 01:16:16,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 01:16:16,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 01:16:16,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 01:16:16,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 01:16:16,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 01:16:16,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 01:16:16,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 01:16:16,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 01:16:16,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 01:16:16,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 01:16:16,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 01:16:16,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 01:16:16,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 01:16:16,870 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 [2020-10-28 01:16:16,898 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 01:16:16,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 01:16:16,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 01:16:16,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 01:16:16,901 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 01:16:16,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 01:16:16,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 01:16:16,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 01:16:16,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 01:16:16,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 01:16:16,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 01:16:16,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 01:16:16,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 01:16:16,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 01:16:16,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 01:16:16,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 01:16:16,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 01:16:16,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 01:16:16,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 01:16:16,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 01:16:16,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 01:16:16,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 01:16:16,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 01:16:16,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 01:16:16,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 01:16:16,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 01:16:16,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 01:16:16,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 01:16:16,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 01:16:16,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 01:16:17,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 01:16:17,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 01:16:17,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 01:16:17,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 01:16:17,338 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 01:16:17,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-28 01:16:17,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b04c60b/12ee88637bbc4de78442cae8b2c944bb/FLAG4a0c0edcb [2020-10-28 01:16:18,076 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 01:16:18,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-28 01:16:18,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b04c60b/12ee88637bbc4de78442cae8b2c944bb/FLAG4a0c0edcb [2020-10-28 01:16:18,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b04c60b/12ee88637bbc4de78442cae8b2c944bb [2020-10-28 01:16:18,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 01:16:18,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 01:16:18,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 01:16:18,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 01:16:18,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 01:16:18,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7038f343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18, skipping insertion in model container [2020-10-28 01:16:18,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 01:16:18,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 01:16:18,714 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 01:16:18,716 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 01:16:18,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 01:16:18,753 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 01:16:18,774 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 01:16:18,775 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 01:16:18,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 01:16:18,817 INFO L208 MainTranslator]: Completed translation [2020-10-28 01:16:18,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18 WrapperNode [2020-10-28 01:16:18,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 01:16:18,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 01:16:18,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 01:16:18,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 01:16:18,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (1/1) ... [2020-10-28 01:16:18,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 01:16:18,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 01:16:18,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 01:16:18,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 01:16:18,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (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 [2020-10-28 01:16:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 01:16:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 01:16:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 01:16:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 01:16:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 01:16:18,955 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-28 01:16:18,955 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-28 01:16:18,955 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-28 01:16:18,955 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-28 01:16:18,955 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-28 01:16:18,955 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-28 01:16:18,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 01:16:18,956 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-28 01:16:18,956 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 01:16:18,956 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 01:16:18,956 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 01:16:18,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 01:16:18,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 01:16:18,957 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 01:16:18,957 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 01:16:18,957 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 01:16:18,957 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 01:16:18,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 01:16:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 01:16:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-28 01:16:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 01:16:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 01:16:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 01:16:18,958 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-28 01:16:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 01:16:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-28 01:16:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 01:16:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 01:16:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-28 01:16:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-28 01:16:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-28 01:16:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-28 01:16:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 01:16:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 01:16:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 01:16:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 01:16:19,598 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 01:16:19,599 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 01:16:19,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:16:19 BoogieIcfgContainer [2020-10-28 01:16:19,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 01:16:19,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 01:16:19,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 01:16:19,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 01:16:19,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:16:18" (1/3) ... [2020-10-28 01:16:19,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25072730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:16:19, skipping insertion in model container [2020-10-28 01:16:19,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:16:18" (2/3) ... [2020-10-28 01:16:19,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25072730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:16:19, skipping insertion in model container [2020-10-28 01:16:19,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:16:19" (3/3) ... [2020-10-28 01:16:19,611 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-10-28 01:16:19,627 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 01:16:19,633 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 01:16:19,646 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 01:16:19,681 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 01:16:19,681 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 01:16:19,682 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 01:16:19,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 01:16:19,682 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 01:16:19,683 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 01:16:19,683 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 01:16:19,683 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 01:16:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-10-28 01:16:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 01:16:19,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:16:19,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:16:19,717 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:16:19,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:16:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1887560365, now seen corresponding path program 1 times [2020-10-28 01:16:19,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:16:19,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665659935] [2020-10-28 01:16:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:16:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:19,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 01:16:20,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-28 01:16:20,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 01:16:20,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 01:16:20,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:16:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:20,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 01:16:20,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:20,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:16:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:20,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:20,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 01:16:20,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:20,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 01:16:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:20,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:20,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:20,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 01:16:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:20,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:20,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:20,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:20,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 01:16:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:20,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:20,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:20,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 01:16:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:20,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 01:16:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:20,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:20,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:16:20,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 01:16:20,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:20,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 01:16:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:20,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:20,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:20,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:20,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:16:20,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:20,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:20,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 01:16:20,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:20,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:16:20,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665659935] [2020-10-28 01:16:20,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:16:20,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 01:16:20,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454952128] [2020-10-28 01:16:20,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:16:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:16:20,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:16:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:16:20,422 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 6 states. [2020-10-28 01:16:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:16:21,022 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2020-10-28 01:16:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:16:21,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 01:16:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:16:21,036 INFO L225 Difference]: With dead ends: 170 [2020-10-28 01:16:21,037 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 01:16:21,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 01:16:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 01:16:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-10-28 01:16:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 01:16:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-28 01:16:21,106 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 45 [2020-10-28 01:16:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:16:21,107 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-28 01:16:21,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:16:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-28 01:16:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 01:16:21,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:16:21,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:16:21,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 01:16:21,111 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:16:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:16:21,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1589758481, now seen corresponding path program 1 times [2020-10-28 01:16:21,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:16:21,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531774297] [2020-10-28 01:16:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:16:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 01:16:21,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-28 01:16:21,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:16:21,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 01:16:21,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 01:16:21,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:16:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:21,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:16:21,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:21,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:16:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:21,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:21,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:21,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:21,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:21,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 01:16:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:21,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 01:16:21,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:21,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:21,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:21,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 01:16:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:21,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:16:21,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 01:16:21,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:21,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 01:16:21,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 01:16:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:21,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:16:21,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 01:16:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:21,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 01:16:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:21,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 01:16:21,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 01:16:21,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:21,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 01:16:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:21,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:21,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:21,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:21,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:21,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:21,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 01:16:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:21,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:16:21,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531774297] [2020-10-28 01:16:21,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:16:21,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 01:16:21,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316852229] [2020-10-28 01:16:21,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 01:16:21,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:16:21,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 01:16:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 01:16:21,743 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-10-28 01:16:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:16:22,586 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2020-10-28 01:16:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 01:16:22,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-28 01:16:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:16:22,590 INFO L225 Difference]: With dead ends: 153 [2020-10-28 01:16:22,590 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 01:16:22,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-28 01:16:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 01:16:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-28 01:16:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 01:16:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-28 01:16:22,610 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2020-10-28 01:16:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:16:22,611 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-28 01:16:22,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 01:16:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-28 01:16:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 01:16:22,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:16:22,614 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 01:16:22,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 01:16:22,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:16:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:16:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash -714449536, now seen corresponding path program 1 times [2020-10-28 01:16:22,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:16:22,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850812127] [2020-10-28 01:16:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:16:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:22,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:22,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 01:16:25,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 01:16:25,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2899 [2020-10-28 01:16:25,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:16:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 01:16:25,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 01:16:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:16:25,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:16:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:25,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:16:25,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:25,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:25,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:25,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:16:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:25,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 01:16:25,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:25,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:25,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 01:16:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:25,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 01:16:25,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:25,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:16:25,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 01:16:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:16:25,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 01:16:25,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:25,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 01:16:25,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:16:25,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 01:16:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:25,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:25,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:25,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:25,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:25,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 01:16:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:25,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:25,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:25,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:25,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 01:16:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:25,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 01:16:25,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:25,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:25,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:25,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 01:16:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:25,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:16:25,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:25,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:25,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 01:16:25,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:25,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 01:16:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:25,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:25,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:25,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:25,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:25,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 01:16:25,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:25,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:25,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 01:16:25,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:25,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 01:16:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850812127] [2020-10-28 01:16:25,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:16:25,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 01:16:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700257717] [2020-10-28 01:16:25,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 01:16:25,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:16:25,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 01:16:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 01:16:25,915 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 11 states. [2020-10-28 01:16:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:16:27,099 INFO L93 Difference]: Finished difference Result 153 states and 194 transitions. [2020-10-28 01:16:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 01:16:27,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 01:16:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:16:27,101 INFO L225 Difference]: With dead ends: 153 [2020-10-28 01:16:27,102 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 01:16:27,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-28 01:16:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 01:16:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-28 01:16:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 01:16:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2020-10-28 01:16:27,121 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 57 [2020-10-28 01:16:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:16:27,122 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2020-10-28 01:16:27,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 01:16:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2020-10-28 01:16:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 01:16:27,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:16:27,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:16:27,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 01:16:27,126 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:16:27,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:16:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash 471555621, now seen corresponding path program 1 times [2020-10-28 01:16:27,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:16:27,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795429999] [2020-10-28 01:16:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:16:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:27,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:27,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 01:16:30,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 01:16:30,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2865 [2020-10-28 01:16:30,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:16:30,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 01:16:30,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 01:16:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:16:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:30,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:16:30,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:30,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:16:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:30,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 01:16:30,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:30,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 01:16:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:30,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:16:30,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 01:16:30,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 01:16:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:16:30,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 01:16:30,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 01:16:30,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 01:16:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 01:16:30,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 01:16:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:30,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 01:16:30,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:30,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:30,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 01:16:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:30,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:30,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:30,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:30,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 01:16:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:30,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:30,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:30,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 01:16:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:30,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:30,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 01:16:30,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 01:16:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:16:30,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 01:16:30,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 01:16:30,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 01:16:30,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:30,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 01:16:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:30,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:16:30,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:30,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:30,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:16:30,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 01:16:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:30,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:30,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:30,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:30,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:16:30,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:30,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:30,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:16:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 01:16:30,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795429999] [2020-10-28 01:16:30,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:16:30,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 01:16:30,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608434483] [2020-10-28 01:16:30,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 01:16:30,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:16:30,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 01:16:30,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 01:16:30,500 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand 13 states. [2020-10-28 01:16:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:16:32,025 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2020-10-28 01:16:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 01:16:32,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-28 01:16:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:16:32,031 INFO L225 Difference]: With dead ends: 173 [2020-10-28 01:16:32,031 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 01:16:32,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-28 01:16:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 01:16:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-10-28 01:16:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 01:16:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-10-28 01:16:32,059 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 69 [2020-10-28 01:16:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:16:32,060 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-10-28 01:16:32,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 01:16:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-10-28 01:16:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 01:16:32,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:16:32,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:16:32,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 01:16:32,062 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:16:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:16:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash -808194556, now seen corresponding path program 1 times [2020-10-28 01:16:32,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:16:32,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547365520] [2020-10-28 01:16:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:16:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:32,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 01:16:36,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 01:16:36,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4466 [2020-10-28 01:16:36,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 01:16:36,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 01:16:36,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 01:16:36,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:16:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:36,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:36,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:36,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:16:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:36,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:16:36,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 01:16:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:36,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 01:16:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 01:16:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 01:16:36,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 01:16:36,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 01:16:36,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 01:16:36,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 01:16:36,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 01:16:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:36,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:36,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:36,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:36,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:36,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 01:16:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:36,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:16:36,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 01:16:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:16:36,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 01:16:36,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:16:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 01:16:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 01:16:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 01:16:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:36,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 01:16:36,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:36,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:36,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 01:16:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:36,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 01:16:36,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:16:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:36,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:16:36,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 01:16:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:36,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 01:16:36,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:36,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 01:16:36,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:36,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 01:16:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:16:36,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 01:16:36,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 01:16:36,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:36,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 01:16:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 01:16:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 01:16:36,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 01:16:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 01:16:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:36,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:36,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 01:16:36,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:36,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:36,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:36,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:36,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:36,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 01:16:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:16:36,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:16:36,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:16:36,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 01:16:36,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:16:37,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 01:16:37,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:16:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:16:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:16:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:16:37,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:16:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 01:16:37,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547365520] [2020-10-28 01:16:37,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:16:37,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 01:16:37,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025813444] [2020-10-28 01:16:37,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 01:16:37,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:16:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 01:16:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 01:16:37,026 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand 14 states. [2020-10-28 01:16:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:16:38,293 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2020-10-28 01:16:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 01:16:38,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-28 01:16:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:16:38,295 INFO L225 Difference]: With dead ends: 175 [2020-10-28 01:16:38,296 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 01:16:38,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-28 01:16:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 01:16:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-28 01:16:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 01:16:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2020-10-28 01:16:38,331 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 82 [2020-10-28 01:16:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:16:38,331 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2020-10-28 01:16:38,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 01:16:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2020-10-28 01:16:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 01:16:38,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:16:38,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-10-28 01:16:38,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 01:16:38,336 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:16:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:16:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash 719295489, now seen corresponding path program 1 times [2020-10-28 01:16:38,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:16:38,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871297428] [2020-10-28 01:16:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:16:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 01:16:38,377 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 01:16:38,377 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 01:16:38,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 01:16:38,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 01:16:38 BoogieIcfgContainer [2020-10-28 01:16:38,416 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 01:16:38,420 INFO L168 Benchmark]: Toolchain (without parser) took 19969.02 ms. Allocated memory was 151.0 MB in the beginning and 402.7 MB in the end (delta: 251.7 MB). Free memory was 126.0 MB in the beginning and 304.6 MB in the end (delta: -178.6 MB). Peak memory consumption was 74.5 MB. Max. memory is 8.0 GB. [2020-10-28 01:16:38,426 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 81.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 01:16:38,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.97 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 113.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-28 01:16:38,429 INFO L168 Benchmark]: Boogie Preprocessor took 56.76 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 111.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 01:16:38,430 INFO L168 Benchmark]: RCFGBuilder took 724.24 ms. Allocated memory is still 151.0 MB. Free memory was 111.5 MB in the beginning and 113.6 MB in the end (delta: -2.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2020-10-28 01:16:38,431 INFO L168 Benchmark]: TraceAbstraction took 18812.45 ms. Allocated memory was 151.0 MB in the beginning and 402.7 MB in the end (delta: 251.7 MB). Free memory was 113.1 MB in the beginning and 304.6 MB in the end (delta: -191.5 MB). Peak memory consumption was 61.7 MB. Max. memory is 8.0 GB. [2020-10-28 01:16:38,441 INFO L339 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 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 81.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 358.97 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 113.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.76 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 111.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 724.24 ms. Allocated memory is still 151.0 MB. Free memory was 111.5 MB in the beginning and 113.6 MB in the end (delta: -2.2 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18812.45 ms. Allocated memory was 151.0 MB in the beginning and 402.7 MB in the end (delta: 251.7 MB). Free memory was 113.1 MB in the beginning and 304.6 MB in the end (delta: -191.5 MB). Peak memory consumption was 61.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L98] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L98] RET, EXPR nondet_tree() [L98] CALL task(nondet_tree()) [L76] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->left [L40] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L40] RET, EXPR min(n->left) [L40] int a = min(n->left); [L41] EXPR n->right [L41] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->right) [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; [L76] RET, EXPR min(t) [L76] int a = min(t); [L77] int b; [L79] CALL, EXPR size(t) [L71] COND FALSE !(!t) [L72] EXPR t->left [L72] CALL, EXPR size(t->left) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->left) [L72] EXPR t->right [L72] CALL, EXPR size(t->right) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->right) [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) [L79] int n = size(t); [L80] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L80] RET assume_abort_if_not(n != 0) [L81] EXPR, FCALL calloc(n, sizeof(int)) [L81] int *x = calloc(n, sizeof(int)); [L82] CALL tree_inorder(t, x, n) [L60] COND FALSE !(!t) [L63] EXPR t->left [L63] CALL, EXPR tree_inorder(t->left, a, i) [L60] COND TRUE !t [L61] return i; [L63] RET, EXPR tree_inorder(t->left, a, i) [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right [L65] CALL, EXPR tree_inorder(t->right, a, i) [L60] COND TRUE !t [L61] return i; [L65] RET, EXPR tree_inorder(t->right, a, i) [L65] i = tree_inorder(t->right, a, i) [L66] return i; [L82] RET tree_inorder(t, x, n) [L83] EXPR x[0] [L83] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_rec_incorrect.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 99 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.7s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 427 SDtfs, 581 SDslu, 1415 SDs, 0 SdLazy, 2034 SolverSat, 623 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 12.6s InterpolantComputationTime, 390 NumberOfCodeBlocks, 390 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 293 ConstructedInterpolants, 0 QuantifiedInterpolants, 80734 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 62/72 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...