/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=SHALLOWEST --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 [2020-10-27 06:46:15,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:46:15,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:46:15,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:46:15,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:46:15,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:46:15,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:46:15,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:46:15,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:46:15,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:46:15,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:46:15,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:46:15,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:46:15,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:46:15,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:46:15,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:46:15,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:46:15,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:46:15,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:46:15,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:46:15,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:46:15,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:46:15,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:46:15,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:46:15,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:46:15,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:46:15,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:46:15,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:46:15,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:46:15,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:46:15,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:46:15,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:46:15,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:46:15,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:46:15,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:46:15,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:46:15,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:46:15,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:46:15,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:46:15,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:46:15,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:46:15,750 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 [2020-10-27 06:46:15,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:46:15,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:46:15,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:46:15,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:46:15,792 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:46:15,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:46:15,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:46:15,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:46:15,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:46:15,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:46:15,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:46:15,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:46:15,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:46:15,793 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:46:15,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:46:15,794 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:46:15,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:46:15,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:46:15,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:46:15,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:46:15,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:46:15,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:46:15,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:46:15,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:46:15,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:46:15,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:46:15,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:46:15,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:46:15,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:46:15,797 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:46:16,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:46:16,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:46:16,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:46:16,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:46:16,200 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:46:16,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-27 06:46:16,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b1fcb216/fbd3217baf4c4b79b434aa83b0a6301e/FLAG1b7f2ed99 [2020-10-27 06:46:16,845 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:46:16,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-27 06:46:16,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b1fcb216/fbd3217baf4c4b79b434aa83b0a6301e/FLAG1b7f2ed99 [2020-10-27 06:46:17,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b1fcb216/fbd3217baf4c4b79b434aa83b0a6301e [2020-10-27 06:46:17,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:46:17,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:46:17,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:46:17,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:46:17,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:46:17,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d2737ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17, skipping insertion in model container [2020-10-27 06:46:17,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:46:17,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:46:17,510 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:17,512 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:17,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:46:17,572 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:46:17,614 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:17,619 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:17,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:46:17,681 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:46:17,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17 WrapperNode [2020-10-27 06:46:17,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:46:17,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:46:17,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:46:17,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:46:17,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (1/1) ... [2020-10-27 06:46:17,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:46:17,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:46:17,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:46:17,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:46:17,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (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 [2020-10-27 06:46:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:46:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:46:17,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 06:46:17,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:46:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 06:46:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-27 06:46:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-27 06:46:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-27 06:46:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-27 06:46:17,889 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-27 06:46:17,889 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-27 06:46:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:46:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-27 06:46:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 06:46:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 06:46:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 06:46:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 06:46:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 06:46:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:46:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 06:46:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:46:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:46:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:46:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 06:46:17,894 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-27 06:46:17,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 06:46:17,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 06:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-27 06:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 06:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-27 06:46:17,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:46:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:46:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-27 06:46:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-27 06:46:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-27 06:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-27 06:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:46:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:46:18,515 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:46:18,516 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 06:46:18,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:46:18 BoogieIcfgContainer [2020-10-27 06:46:18,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:46:18,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:46:18,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:46:18,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:46:18,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:46:17" (1/3) ... [2020-10-27 06:46:18,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ef404c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:46:18, skipping insertion in model container [2020-10-27 06:46:18,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:17" (2/3) ... [2020-10-27 06:46:18,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ef404c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:46:18, skipping insertion in model container [2020-10-27 06:46:18,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:46:18" (3/3) ... [2020-10-27 06:46:18,528 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-10-27 06:46:18,541 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:46:18,546 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:46:18,560 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:46:18,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:46:18,607 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:46:18,607 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:46:18,607 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:46:18,607 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:46:18,607 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:46:18,607 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:46:18,608 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:46:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-10-27 06:46:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 06:46:18,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:18,637 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] [2020-10-27 06:46:18,638 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1887560365, now seen corresponding path program 1 times [2020-10-27 06:46:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:18,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312829993] [2020-10-27 06:46:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:18,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 06:46:19,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 06:46:19,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:46:19,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 06:46:19,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:19,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:19,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:46:19,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:19,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:19,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:19,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:19,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:46:19,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:19,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:19,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 06:46:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:19,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:19,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:46:19,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:19,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:19,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 06:46:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:19,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:19,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:46:19,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:19,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 06:46:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:19,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:46:19,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 06:46:19,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:19,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 06:46:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:19,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 06:46:19,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:46:19,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 06:46:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:19,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:19,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:19,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:19,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:46:19,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 06:46:19,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:19,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:46:19,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312829993] [2020-10-27 06:46:19,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:46:19,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:46:19,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662243891] [2020-10-27 06:46:19,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:46:19,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:46:19,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:46:19,404 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 6 states. [2020-10-27 06:46:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:20,018 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2020-10-27 06:46:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:46:20,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-27 06:46:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:20,033 INFO L225 Difference]: With dead ends: 170 [2020-10-27 06:46:20,033 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 06:46:20,037 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 [2020-10-27 06:46:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 06:46:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-10-27 06:46:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 06:46:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-27 06:46:20,099 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 45 [2020-10-27 06:46:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:20,100 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-27 06:46:20,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 06:46:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-27 06:46:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 06:46:20,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:20,104 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] [2020-10-27 06:46:20,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:46:20,104 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1589758481, now seen corresponding path program 1 times [2020-10-27 06:46:20,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:20,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790434620] [2020-10-27 06:46:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 06:46:20,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-27 06:46:20,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:46:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 06:46:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 06:46:20,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:20,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:46:20,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:20,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:20,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:20,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:20,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:20,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 06:46:20,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:20,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:20,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:20,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 06:46:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:20,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:20,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:20,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:20,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:20,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:20,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 06:46:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:20,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:46:20,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:46:20,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:20,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:20,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:20,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 06:46:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:20,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:46:20,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 06:46:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:20,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:20,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 06:46:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:20,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 06:46:20,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:20,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:46:20,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:20,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:20,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 06:46:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:20,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:20,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:20,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:20,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:20,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:20,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:20,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:20,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 06:46:20,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:20,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:46:20,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790434620] [2020-10-27 06:46:20,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:46:20,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 06:46:20,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687260451] [2020-10-27 06:46:20,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 06:46:20,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:20,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 06:46:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 06:46:20,747 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-10-27 06:46:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:21,774 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2020-10-27 06:46:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 06:46:21,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 06:46:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:21,778 INFO L225 Difference]: With dead ends: 153 [2020-10-27 06:46:21,778 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 06:46:21,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-27 06:46:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 06:46:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-27 06:46:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 06:46:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-27 06:46:21,800 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2020-10-27 06:46:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:21,800 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-27 06:46:21,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 06:46:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-27 06:46:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 06:46:21,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:21,803 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] [2020-10-27 06:46:21,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:46:21,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:21,804 INFO L82 PathProgramCache]: Analyzing trace with hash -714449536, now seen corresponding path program 1 times [2020-10-27 06:46:21,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:21,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779460896] [2020-10-27 06:46:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:24,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:24,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 06:46:24,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:46:24,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3037 [2020-10-27 06:46:24,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:24,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:46:24,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 06:46:24,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 06:46:24,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:24,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:24,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:24,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:24,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:24,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:24,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:24,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:24,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:25,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:25,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 06:46:25,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:46:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 06:46:25,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:25,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 06:46:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:25,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:25,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:46:25,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 06:46:25,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:25,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:25,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 06:46:25,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:46:25,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 06:46:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:25,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 06:46:25,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 06:46:25,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:25,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 06:46:25,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 06:46:25,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 06:46:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:25,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:25,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:25,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:25,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:25,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:25,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 06:46:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:25,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:25,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:25,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:25,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:25,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:25,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:25,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 06:46:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:25,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:25,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:25,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:25,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:25,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 06:46:25,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:25,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:25,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 06:46:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:25,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:25,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:25,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:25,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:25,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:46:25,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:25,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:25,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 06:46:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:25,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:25,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:25,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:25,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 06:46:25,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 06:46:25,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:25,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 06:46:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779460896] [2020-10-27 06:46:25,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:46:25,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 06:46:25,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360249897] [2020-10-27 06:46:25,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 06:46:25,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:25,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 06:46:25,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 06:46:25,294 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 14 states. [2020-10-27 06:46:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:26,887 INFO L93 Difference]: Finished difference Result 180 states and 234 transitions. [2020-10-27 06:46:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 06:46:26,887 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-27 06:46:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:26,891 INFO L225 Difference]: With dead ends: 180 [2020-10-27 06:46:26,892 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 06:46:26,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-27 06:46:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 06:46:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-27 06:46:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 06:46:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-10-27 06:46:26,913 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 57 [2020-10-27 06:46:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:26,914 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-10-27 06:46:26,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 06:46:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-10-27 06:46:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 06:46:26,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:26,917 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, 1] [2020-10-27 06:46:26,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:46:26,917 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash -682918564, now seen corresponding path program 1 times [2020-10-27 06:46:26,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:26,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322573423] [2020-10-27 06:46:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:27,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:27,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 06:46:31,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:46:31,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4150 [2020-10-27 06:46:31,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:46:31,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 06:46:31,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 06:46:31,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:31,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:46:31,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:31,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:31,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:31,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 06:46:31,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 06:46:31,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:31,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 06:46:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 06:46:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:31,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:46:31,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:31,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:31,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 06:46:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:31,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:46:31,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:31,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:31,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 06:46:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 06:46:31,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:46:31,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:31,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 06:46:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 06:46:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:31,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:31,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:31,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 06:46:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:31,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:31,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:31,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:31,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 06:46:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 06:46:31,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 06:46:31,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:31,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 06:46:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 06:46:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:31,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:31,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:31,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 06:46:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:31,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:31,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:31,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:46:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:31,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:31,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:31,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 06:46:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:31,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:31,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:31,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:31,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:31,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 06:46:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:31,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:31,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:31,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:31,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:31,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:46:31,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 06:46:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:31,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-27 06:46:31,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322573423] [2020-10-27 06:46:31,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:46:31,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 06:46:31,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821626810] [2020-10-27 06:46:31,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 06:46:31,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:31,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 06:46:31,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 06:46:31,565 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 13 states. [2020-10-27 06:46:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:32,503 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2020-10-27 06:46:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 06:46:32,504 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-10-27 06:46:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:32,506 INFO L225 Difference]: With dead ends: 150 [2020-10-27 06:46:32,506 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 06:46:32,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:46:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 06:46:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 06:46:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 06:46:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2020-10-27 06:46:32,527 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 80 [2020-10-27 06:46:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:32,528 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2020-10-27 06:46:32,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 06:46:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2020-10-27 06:46:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 06:46:32,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:32,531 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] [2020-10-27 06:46:32,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:46:32,531 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash 719295489, now seen corresponding path program 1 times [2020-10-27 06:46:32,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:32,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920363375] [2020-10-27 06:46:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 06:46:32,575 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 06:46:32,576 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 06:46:32,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:46:32,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 06:46:32 BoogieIcfgContainer [2020-10-27 06:46:32,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 06:46:32,624 INFO L168 Benchmark]: Toolchain (without parser) took 15395.83 ms. Allocated memory was 168.8 MB in the beginning and 354.4 MB in the end (delta: 185.6 MB). Free memory was 143.7 MB in the beginning and 186.8 MB in the end (delta: -43.1 MB). Peak memory consumption was 143.6 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:32,625 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 168.8 MB. Free memory is still 144.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 06:46:32,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 450.77 ms. Allocated memory is still 168.8 MB. Free memory was 143.2 MB in the beginning and 131.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:32,633 INFO L168 Benchmark]: Boogie Preprocessor took 107.04 ms. Allocated memory is still 168.8 MB. Free memory was 131.0 MB in the beginning and 128.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:32,634 INFO L168 Benchmark]: RCFGBuilder took 726.22 ms. Allocated memory is still 168.8 MB. Free memory was 128.7 MB in the beginning and 96.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:32,634 INFO L168 Benchmark]: TraceAbstraction took 14100.38 ms. Allocated memory was 168.8 MB in the beginning and 354.4 MB in the end (delta: 185.6 MB). Free memory was 96.2 MB in the beginning and 186.8 MB in the end (delta: -90.7 MB). Peak memory consumption was 96.4 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:32,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 168.8 MB. Free memory is still 144.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 450.77 ms. Allocated memory is still 168.8 MB. Free memory was 143.2 MB in the beginning and 131.0 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 107.04 ms. Allocated memory is still 168.8 MB. Free memory was 131.0 MB in the beginning and 128.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 726.22 ms. Allocated memory is still 168.8 MB. Free memory was 128.7 MB in the beginning and 96.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14100.38 ms. Allocated memory was 168.8 MB in the beginning and 354.4 MB in the end (delta: 185.6 MB). Free memory was 96.2 MB in the beginning and 186.8 MB in the end (delta: -90.7 MB). Peak memory consumption was 96.4 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: 13.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 345 SDtfs, 546 SDslu, 1150 SDs, 0 SdLazy, 1511 SolverSat, 599 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 319 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 223 ConstructedInterpolants, 0 QuantifiedInterpolants, 44812 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 43/45 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...