/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 20:02:15,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 20:02:15,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 20:02:15,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 20:02:15,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 20:02:15,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 20:02:15,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 20:02:15,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 20:02:15,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 20:02:15,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 20:02:15,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 20:02:15,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 20:02:15,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 20:02:15,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 20:02:15,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 20:02:15,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 20:02:15,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 20:02:15,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 20:02:15,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 20:02:15,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 20:02:15,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 20:02:15,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 20:02:15,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 20:02:15,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 20:02:15,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 20:02:15,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 20:02:15,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 20:02:15,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 20:02:15,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 20:02:15,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 20:02:15,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 20:02:15,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 20:02:15,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 20:02:15,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 20:02:15,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 20:02:15,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 20:02:15,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 20:02:15,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 20:02:15,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 20:02:15,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 20:02:15,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 20:02:15,906 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 20:02:15,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 20:02:15,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 20:02:15,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 20:02:15,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 20:02:15,937 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 20:02:15,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 20:02:15,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 20:02:15,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 20:02:15,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 20:02:15,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 20:02:15,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 20:02:15,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 20:02:15,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 20:02:15,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 20:02:15,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 20:02:15,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 20:02:15,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 20:02:15,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 20:02:15,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 20:02:15,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 20:02:15,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 20:02:15,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 20:02:15,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 20:02:15,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 20:02:15,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 20:02:15,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 20:02:15,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 20:02:15,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 20:02:15,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 20:02:15,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 20:02:16,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 20:02:16,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 20:02:16,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 20:02:16,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 20:02:16,384 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 20:02:16,387 INFO L432 ainManager$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 20:02:16,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdf651b88/c269543fcb77400a8571caaa4c9ae61a/FLAGce17c0357 [2020-10-28 20:02:17,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 20:02:17,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-28 20:02:17,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdf651b88/c269543fcb77400a8571caaa4c9ae61a/FLAGce17c0357 [2020-10-28 20:02:17,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cdf651b88/c269543fcb77400a8571caaa4c9ae61a [2020-10-28 20:02:17,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 20:02:17,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 20:02:17,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 20:02:17,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 20:02:17,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 20:02:17,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8fd2b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17, skipping insertion in model container [2020-10-28 20:02:17,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 20:02:17,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 20:02:17,691 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 20:02:17,693 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 20:02:17,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 20:02:17,735 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 20:02:17,756 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 20:02:17,758 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-28 20:02:17,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 20:02:17,793 INFO L208 MainTranslator]: Completed translation [2020-10-28 20:02:17,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17 WrapperNode [2020-10-28 20:02:17,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 20:02:17,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 20:02:17,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 20:02:17,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 20:02:17,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (1/1) ... [2020-10-28 20:02:17,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 20:02:17,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 20:02:17,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 20:02:17,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 20:02:17,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (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 20:02:17,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 20:02:17,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 20:02:17,950 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 20:02:17,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 20:02:17,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 20:02:17,952 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-28 20:02:17,953 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-28 20:02:17,953 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-28 20:02:17,954 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-28 20:02:17,954 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-28 20:02:17,954 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-28 20:02:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 20:02:17,958 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-28 20:02:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 20:02:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 20:02:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 20:02:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 20:02:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 20:02:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 20:02:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 20:02:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 20:02:17,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 20:02:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 20:02:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 20:02:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-28 20:02:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 20:02:17,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 20:02:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 20:02:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-28 20:02:17,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 20:02:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-28 20:02:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 20:02:17,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 20:02:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-28 20:02:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-28 20:02:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-28 20:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-28 20:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 20:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 20:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 20:02:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 20:02:18,901 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 20:02:18,901 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 20:02:18,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:02:18 BoogieIcfgContainer [2020-10-28 20:02:18,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 20:02:18,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 20:02:18,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 20:02:18,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 20:02:18,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:02:17" (1/3) ... [2020-10-28 20:02:18,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdf8943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:02:18, skipping insertion in model container [2020-10-28 20:02:18,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:02:17" (2/3) ... [2020-10-28 20:02:18,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdf8943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:02:18, skipping insertion in model container [2020-10-28 20:02:18,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:02:18" (3/3) ... [2020-10-28 20:02:18,914 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-10-28 20:02:18,927 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 20:02:18,933 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 20:02:18,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 20:02:18,977 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 20:02:18,977 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 20:02:18,977 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 20:02:18,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 20:02:18,977 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 20:02:18,978 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 20:02:18,978 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 20:02:18,978 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 20:02:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-10-28 20:02:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 20:02:19,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:19,014 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 20:02:19,015 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:19,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1887560365, now seen corresponding path program 1 times [2020-10-28 20:02:19,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:19,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748469828] [2020-10-28 20:02:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 20:02:19,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-28 20:02:19,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 20:02:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 20:02:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:02:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:19,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 20:02:19,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:19,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:19,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 20:02:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:19,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 20:02:19,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:19,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:19,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 20:02:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:19,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:02:19,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:19,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 20:02:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:19,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:19,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:19,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 20:02:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:19,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 20:02:19,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 20:02:19,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:19,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 20:02:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:19,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:19,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 20:02:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:19,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 20:02:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:19,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:19,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:19,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:19,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 20:02:19,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:19,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:19,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:19,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 20:02:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:19,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:19,817 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 20:02:19,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748469828] [2020-10-28 20:02:19,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 20:02:19,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 20:02:19,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733460981] [2020-10-28 20:02:19,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 20:02:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:02:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 20:02:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 20:02:19,846 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 6 states. [2020-10-28 20:02:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:20,463 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2020-10-28 20:02:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 20:02:20,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 20:02:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:20,478 INFO L225 Difference]: With dead ends: 170 [2020-10-28 20:02:20,479 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 20:02:20,484 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 20:02:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 20:02:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-10-28 20:02:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 20:02:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-28 20:02:20,554 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 45 [2020-10-28 20:02:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:20,555 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-28 20:02:20,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 20:02:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-28 20:02:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 20:02:20,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:20,559 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 20:02:20,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 20:02:20,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:20,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1589758481, now seen corresponding path program 1 times [2020-10-28 20:02:20,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:20,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310526709] [2020-10-28 20:02:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:20,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:20,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 20:02:20,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:20,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-28 20:02:20,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:20,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 20:02:20,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 20:02:20,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 20:02:20,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:21,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:02:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:21,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:21,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:21,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:21,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 20:02:21,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:21,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:21,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 20:02:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:21,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:21,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:21,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:21,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:21,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 20:02:21,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:21,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:21,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:21,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:21,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 20:02:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:21,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:21,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:21,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:21,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:21,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:21,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:21,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:21,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:21,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:21,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 20:02:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:21,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:21,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:21,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:21,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 20:02:21,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:21,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:21,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 20:02:21,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:21,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 20:02:21,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 20:02:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:21,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:21,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:21,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:21,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 20:02:21,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:21,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:21,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 20:02:21,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 20:02:21,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:21,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:21,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 20:02:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:21,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:21,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:21,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:21,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:21,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:21,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:21,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 20:02:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:21,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:21,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 20:02:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:21,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:21,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:21,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:21,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:21,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:21,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 20:02:21,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:21,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:21,343 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 20:02:21,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310526709] [2020-10-28 20:02:21,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 20:02:21,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 20:02:21,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718316851] [2020-10-28 20:02:21,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 20:02:21,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:02:21,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 20:02:21,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 20:02:21,348 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-10-28 20:02:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:22,248 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2020-10-28 20:02:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 20:02:22,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-28 20:02:22,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:22,253 INFO L225 Difference]: With dead ends: 153 [2020-10-28 20:02:22,253 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 20:02:22,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-28 20:02:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 20:02:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-28 20:02:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 20:02:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-28 20:02:22,276 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2020-10-28 20:02:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:22,277 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-28 20:02:22,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 20:02:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-28 20:02:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 20:02:22,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:22,284 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 20:02:22,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 20:02:22,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash -714449536, now seen corresponding path program 1 times [2020-10-28 20:02:22,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:22,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804101004] [2020-10-28 20:02:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:22,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:22,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:22,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 20:02:25,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 20:02:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2955 [2020-10-28 20:02:25,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 20:02:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 20:02:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 20:02:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:25,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:02:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:25,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:25,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:25,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:25,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:25,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 20:02:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:25,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:25,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:25,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:25,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 20:02:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:25,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 20:02:25,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:25,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:25,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:25,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 20:02:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 20:02:25,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 20:02:25,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 20:02:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 20:02:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 20:02:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:25,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:02:25,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:25,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:25,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 20:02:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:25,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:25,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:25,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:25,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:25,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 20:02:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:25,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:25,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:25,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 20:02:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:25,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:25,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 20:02:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:25,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 20:02:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:25,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:25,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:25,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:25,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 20:02:25,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:25,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:25,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 20:02:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 20:02:25,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:25,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:25,645 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 20:02:25,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804101004] [2020-10-28 20:02:25,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 20:02:25,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 20:02:25,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604892862] [2020-10-28 20:02:25,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 20:02:25,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:02:25,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 20:02:25,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 20:02:25,648 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 11 states. [2020-10-28 20:02:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:26,765 INFO L93 Difference]: Finished difference Result 153 states and 194 transitions. [2020-10-28 20:02:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 20:02:26,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 20:02:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:26,768 INFO L225 Difference]: With dead ends: 153 [2020-10-28 20:02:26,769 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 20:02:26,773 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 20:02:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 20:02:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-28 20:02:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 20:02:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2020-10-28 20:02:26,812 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 57 [2020-10-28 20:02:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:26,813 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2020-10-28 20:02:26,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 20:02:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2020-10-28 20:02:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 20:02:26,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:26,825 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 20:02:26,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 20:02:26,826 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:26,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash 471555621, now seen corresponding path program 1 times [2020-10-28 20:02:26,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:26,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209799575] [2020-10-28 20:02:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:26,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:26,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:26,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:27,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 20:02:30,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 20:02:30,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3434 [2020-10-28 20:02:30,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 20:02:30,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 20:02:30,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 20:02:30,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:02:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:30,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:30,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:30,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:30,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 20:02:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:30,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 20:02:30,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 20:02:30,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 20:02:30,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 20:02:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:30,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 20:02:30,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 20:02:30,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:30,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 20:02:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 20:02:30,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 20:02:30,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 20:02:30,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 20:02:30,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 20:02:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:30,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 20:02:30,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:30,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:30,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 20:02:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:30,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:30,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:30,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:30,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 20:02:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:30,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 20:02:30,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:30,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 20:02:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:30,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:30,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 20:02:30,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 20:02:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 20:02:30,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 20:02:30,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 20:02:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 20:02:30,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 20:02:30,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 20:02:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:30,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:02:30,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:30,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 20:02:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:30,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:30,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:30,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:30,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 20:02:30,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:30,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:30,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 20:02:30,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209799575] [2020-10-28 20:02:30,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 20:02:30,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 20:02:30,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183065569] [2020-10-28 20:02:30,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 20:02:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:02:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 20:02:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 20:02:30,717 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand 12 states. [2020-10-28 20:02:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:31,934 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2020-10-28 20:02:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 20:02:31,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-28 20:02:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:31,937 INFO L225 Difference]: With dead ends: 169 [2020-10-28 20:02:31,937 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 20:02:31,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-28 20:02:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 20:02:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 20:02:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 20:02:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-10-28 20:02:31,956 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 69 [2020-10-28 20:02:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:31,956 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-10-28 20:02:31,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 20:02:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-10-28 20:02:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 20:02:31,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:31,958 INFO L422 BasicCegarLoop]: trace histogram [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 20:02:31,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 20:02:31,958 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:31,959 INFO L82 PathProgramCache]: Analyzing trace with hash 420004104, now seen corresponding path program 1 times [2020-10-28 20:02:31,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:31,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295636863] [2020-10-28 20:02:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:31,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:32,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:36,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:36,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 20:02:36,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 20:02:36,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 20:02:36,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:36,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 20:02:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 20:02:36,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 20:02:36,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:02:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:37,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:02:37,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:37,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:37,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 20:02:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 20:02:37,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 20:02:37,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:37,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-28 20:02:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:37,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:37,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:37,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:37,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 20:02:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:37,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:37,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:37,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:37,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 20:02:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:37,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 20:02:37,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 20:02:37,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 20:02:37,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 20:02:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 20:02:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 20:02:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:37,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 20:02:37,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:37,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:37,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 20:02:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:37,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 20:02:37,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:37,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 20:02:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:37,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:37,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:37,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 20:02:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:37,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 20:02:37,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 20:02:37,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 20:02:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 20:02:37,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 20:02:37,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 20:02:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 20:02:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 20:02:37,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 20:02:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:37,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:02:37,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:37,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:37,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 20:02:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:37,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:37,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:37,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:37,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:37,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:37,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:37,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:37,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:37,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 20:02:37,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295636863] [2020-10-28 20:02:37,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 20:02:37,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 20:02:37,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140202286] [2020-10-28 20:02:37,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 20:02:37,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:02:37,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 20:02:37,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 20:02:37,462 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand 11 states. [2020-10-28 20:02:38,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:38,553 INFO L93 Difference]: Finished difference Result 168 states and 213 transitions. [2020-10-28 20:02:38,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 20:02:38,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-28 20:02:38,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:38,556 INFO L225 Difference]: With dead ends: 168 [2020-10-28 20:02:38,556 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 20:02:38,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-28 20:02:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 20:02:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-28 20:02:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 20:02:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2020-10-28 20:02:38,589 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 79 [2020-10-28 20:02:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:38,589 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2020-10-28 20:02:38,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 20:02:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2020-10-28 20:02:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 20:02:38,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:38,594 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 20:02:38,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 20:02:38,594 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash 719295489, now seen corresponding path program 1 times [2020-10-28 20:02:38,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:38,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377151451] [2020-10-28 20:02:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 20:02:38,640 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 20:02:38,641 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 20:02:38,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 20:02:38,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:02:38 BoogieIcfgContainer [2020-10-28 20:02:38,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 20:02:38,686 INFO L168 Benchmark]: Toolchain (without parser) took 21221.49 ms. Allocated memory was 163.6 MB in the beginning and 448.8 MB in the end (delta: 285.2 MB). Free memory was 137.9 MB in the beginning and 409.9 MB in the end (delta: -272.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:38,687 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 163.6 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 20:02:38,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.83 ms. Allocated memory is still 163.6 MB. Free memory was 137.2 MB in the beginning and 125.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:38,694 INFO L168 Benchmark]: Boogie Preprocessor took 67.78 ms. Allocated memory is still 163.6 MB. Free memory was 125.5 MB in the beginning and 123.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:38,695 INFO L168 Benchmark]: RCFGBuilder took 1040.26 ms. Allocated memory is still 163.6 MB. Free memory was 123.3 MB in the beginning and 127.6 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:38,696 INFO L168 Benchmark]: TraceAbstraction took 19776.10 ms. Allocated memory was 163.6 MB in the beginning and 448.8 MB in the end (delta: 285.2 MB). Free memory was 127.1 MB in the beginning and 409.9 MB in the end (delta: -282.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:38,708 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 163.6 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 323.83 ms. Allocated memory is still 163.6 MB. Free memory was 137.2 MB in the beginning and 125.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.78 ms. Allocated memory is still 163.6 MB. Free memory was 125.5 MB in the beginning and 123.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1040.26 ms. Allocated memory is still 163.6 MB. Free memory was 123.3 MB in the beginning and 127.6 MB in the end (delta: -4.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19776.10 ms. Allocated memory was 163.6 MB in the beginning and 448.8 MB in the end (delta: 285.2 MB). Free memory was 127.1 MB in the beginning and 409.9 MB in the end (delta: -282.8 MB). Peak memory consumption was 3.4 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: 19.6s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 430 SDtfs, 607 SDslu, 1194 SDs, 0 SdLazy, 1718 SolverSat, 677 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.2s 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, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 387 NumberOfCodeBlocks, 387 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 290 ConstructedInterpolants, 0 QuantifiedInterpolants, 76868 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 63/69 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...