/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=BIGGEST --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 -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 21:15:19,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 21:15:19,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 21:15:19,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 21:15:19,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 21:15:19,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 21:15:19,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 21:15:19,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 21:15:19,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 21:15:19,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 21:15:19,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 21:15:19,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 21:15:19,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 21:15:19,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 21:15:19,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 21:15:19,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 21:15:19,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 21:15:19,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 21:15:19,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 21:15:19,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 21:15:19,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 21:15:19,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 21:15:19,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 21:15:19,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 21:15:19,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 21:15:19,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 21:15:19,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 21:15:19,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 21:15:19,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 21:15:19,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 21:15:19,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 21:15:19,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 21:15:19,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 21:15:19,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 21:15:19,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 21:15:19,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 21:15:19,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 21:15:19,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 21:15:19,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 21:15:19,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 21:15:19,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 21:15:19,204 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 [2020-10-12 21:15:19,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 21:15:19,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 21:15:19,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 21:15:19,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 21:15:19,227 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 21:15:19,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 21:15:19,228 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 21:15:19,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 21:15:19,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 21:15:19,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 21:15:19,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 21:15:19,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 21:15:19,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 21:15:19,229 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 21:15:19,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 21:15:19,229 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 21:15:19,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 21:15:19,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 21:15:19,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 21:15:19,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 21:15:19,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 21:15:19,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 21:15:19,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 21:15:19,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 21:15:19,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 21:15:19,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 21:15:19,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 21:15:19,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 21:15:19,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 21:15:19,235 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 21:15:19,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 21:15:19,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 21:15:19,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 21:15:19,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 21:15:19,562 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 21:15:19,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-10-12 21:15:19,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bc531153/f03f17f7cba841069cb7dddb93052e7a/FLAG4d356e400 [2020-10-12 21:15:20,131 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 21:15:20,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-10-12 21:15:20,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bc531153/f03f17f7cba841069cb7dddb93052e7a/FLAG4d356e400 [2020-10-12 21:15:20,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8bc531153/f03f17f7cba841069cb7dddb93052e7a [2020-10-12 21:15:20,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 21:15:20,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 21:15:20,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 21:15:20,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 21:15:20,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 21:15:20,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722dc2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20, skipping insertion in model container [2020-10-12 21:15:20,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 21:15:20,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 21:15:20,686 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-12 21:15:20,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 21:15:20,718 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 21:15:20,829 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-12 21:15:20,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 21:15:20,863 INFO L208 MainTranslator]: Completed translation [2020-10-12 21:15:20,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20 WrapperNode [2020-10-12 21:15:20,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 21:15:20,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 21:15:20,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 21:15:20,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 21:15:20,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (1/1) ... [2020-10-12 21:15:20,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 21:15:20,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 21:15:20,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 21:15:20,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 21:15:20,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (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 [2020-10-12 21:15:21,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 21:15:21,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 21:15:21,005 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 21:15:21,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 21:15:21,005 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-12 21:15:21,005 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-12 21:15:21,005 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-12 21:15:21,005 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-12 21:15:21,006 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-12 21:15:21,006 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-12 21:15:21,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 21:15:21,006 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-12 21:15:21,006 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 21:15:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 21:15:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 21:15:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 21:15:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 21:15:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 21:15:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 21:15:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 21:15:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 21:15:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-12 21:15:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 21:15:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 21:15:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 21:15:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-12 21:15:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 21:15:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-12 21:15:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 21:15:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 21:15:21,009 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-12 21:15:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-12 21:15:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-12 21:15:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 21:15:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-12 21:15:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 21:15:21,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 21:15:21,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 21:15:21,549 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 21:15:21,549 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 21:15:21,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:15:21 BoogieIcfgContainer [2020-10-12 21:15:21,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 21:15:21,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 21:15:21,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 21:15:21,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 21:15:21,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:15:20" (1/3) ... [2020-10-12 21:15:21,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65aa8c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:15:21, skipping insertion in model container [2020-10-12 21:15:21,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:20" (2/3) ... [2020-10-12 21:15:21,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65aa8c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:15:21, skipping insertion in model container [2020-10-12 21:15:21,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:15:21" (3/3) ... [2020-10-12 21:15:21,564 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-10-12 21:15:21,575 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 21:15:21,583 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 21:15:21,597 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 21:15:21,625 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 21:15:21,625 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 21:15:21,625 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 21:15:21,625 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 21:15:21,626 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 21:15:21,626 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 21:15:21,626 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 21:15:21,626 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 21:15:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-10-12 21:15:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 21:15:21,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:21,660 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] [2020-10-12 21:15:21,661 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:21,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times [2020-10-12 21:15:21,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:21,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776648386] [2020-10-12 21:15:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:21,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 21:15:22,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-12 21:15:22,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 21:15:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 21:15:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:15:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:22,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 21:15:22,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:22,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 21:15:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 21:15:22,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:22,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 21:15:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:22,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 21:15:22,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:22,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 21:15:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:22,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 21:15:22,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:22,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:22,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 21:15:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:22,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 21:15:22,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 21:15:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:22,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 21:15:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:22,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 21:15:22,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 21:15:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:22,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 21:15:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:22,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:22,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:22,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 21:15:22,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 21:15:22,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:22,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:15:22,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776648386] [2020-10-12 21:15:22,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:15:22,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 21:15:22,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64048526] [2020-10-12 21:15:22,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 21:15:22,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:15:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 21:15:22,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 21:15:22,351 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-10-12 21:15:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:15:22,772 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2020-10-12 21:15:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 21:15:22,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-12 21:15:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:15:22,788 INFO L225 Difference]: With dead ends: 168 [2020-10-12 21:15:22,789 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 21:15:22,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-12 21:15:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 21:15:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-10-12 21:15:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 21:15:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-12 21:15:22,874 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2020-10-12 21:15:22,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:15:22,875 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-12 21:15:22,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 21:15:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-12 21:15:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 21:15:22,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:22,883 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] [2020-10-12 21:15:22,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 21:15:22,884 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:22,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times [2020-10-12 21:15:22,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:22,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956103254] [2020-10-12 21:15:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:22,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 21:15:23,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-12 21:15:23,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 21:15:23,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 21:15:23,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 21:15:23,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:15:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:23,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:23,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:23,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:23,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:23,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:23,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:23,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 21:15:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:23,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:23,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:23,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:23,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:23,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:23,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 21:15:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:23,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:23,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:23,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:23,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:23,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:23,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:23,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 21:15:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:23,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:23,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 21:15:23,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:15:23,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:23,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:23,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 21:15:23,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 21:15:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:23,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:23,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 21:15:23,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 21:15:23,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:23,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:23,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 21:15:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:23,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:23,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 21:15:23,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:23,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:23,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 21:15:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:23,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:23,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:23,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:23,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:23,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:23,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 21:15:23,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:23,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:15:23,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956103254] [2020-10-12 21:15:23,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:15:23,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 21:15:23,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577907077] [2020-10-12 21:15:23,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 21:15:23,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:15:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 21:15:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 21:15:23,506 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-10-12 21:15:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:15:24,136 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2020-10-12 21:15:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 21:15:24,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-12 21:15:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:15:24,140 INFO L225 Difference]: With dead ends: 154 [2020-10-12 21:15:24,140 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 21:15:24,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-12 21:15:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 21:15:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-10-12 21:15:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 21:15:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-12 21:15:24,160 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2020-10-12 21:15:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:15:24,161 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-12 21:15:24,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 21:15:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-12 21:15:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 21:15:24,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:24,163 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] [2020-10-12 21:15:24,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 21:15:24,164 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times [2020-10-12 21:15:24,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:24,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792370894] [2020-10-12 21:15:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:24,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 21:15:27,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 21:15:27,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2966 [2020-10-12 21:15:27,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 21:15:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 21:15:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 21:15:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:27,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:15:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:27,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:27,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:27,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:27,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 21:15:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:27,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 21:15:27,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:15:27,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:27,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 21:15:27,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 21:15:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:27,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 21:15:27,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 21:15:27,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 21:15:27,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 21:15:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 21:15:27,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 21:15:27,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 21:15:27,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 21:15:27,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 21:15:27,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 21:15:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:27,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 21:15:27,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:27,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 21:15:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:27,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:27,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:27,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 21:15:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:27,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:15:27,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 21:15:27,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:27,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 21:15:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:27,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:15:27,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:27,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 21:15:27,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:27,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 21:15:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:27,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:27,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:27,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:27,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:27,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:27,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 21:15:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:27,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 21:15:27,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792370894] [2020-10-12 21:15:27,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 21:15:27,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 21:15:27,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183229001] [2020-10-12 21:15:27,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 21:15:27,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:15:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 21:15:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 21:15:27,511 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 14 states. [2020-10-12 21:15:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:15:28,559 INFO L93 Difference]: Finished difference Result 181 states and 235 transitions. [2020-10-12 21:15:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 21:15:28,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-12 21:15:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:15:28,562 INFO L225 Difference]: With dead ends: 181 [2020-10-12 21:15:28,562 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 21:15:28,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-12 21:15:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 21:15:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-12 21:15:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 21:15:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-10-12 21:15:28,580 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 56 [2020-10-12 21:15:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:15:28,580 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-10-12 21:15:28,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 21:15:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-10-12 21:15:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 21:15:28,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:28,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:15:28,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 21:15:28,583 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:28,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times [2020-10-12 21:15:28,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:28,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891607] [2020-10-12 21:15:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:28,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:28,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:28,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 21:15:32,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 21:15:32,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3841 [2020-10-12 21:15:32,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 21:15:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 21:15:32,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 21:15:32,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:32,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:15:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:32,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 21:15:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 21:15:32,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-12 21:15:32,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:32,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 21:15:32,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 21:15:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:32,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 21:15:32,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:32,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:32,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 21:15:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:32,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 21:15:32,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:32,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 21:15:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 21:15:32,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-12 21:15:32,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:32,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 21:15:32,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 21:15:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:32,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:32,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:32,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 21:15:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:32,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:32,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:32,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 21:15:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 21:15:32,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 21:15:32,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 21:15:32,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 21:15:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:32,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:15:32,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:32,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 21:15:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:32,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:32,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:32,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 21:15:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:32,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 21:15:32,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:32,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:32,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:32,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-12 21:15:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:32,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:32,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:32,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:32,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 21:15:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:32,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:32,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:32,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:32,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:32,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 21:15:32,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:32,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:32,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 21:15:32,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:32,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 21:15:32,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891607] [2020-10-12 21:15:32,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:15:32,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 21:15:32,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669113250] [2020-10-12 21:15:32,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 21:15:32,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:15:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 21:15:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 21:15:32,931 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 13 states. [2020-10-12 21:15:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:15:33,720 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2020-10-12 21:15:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 21:15:33,721 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-12 21:15:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:15:33,723 INFO L225 Difference]: With dead ends: 151 [2020-10-12 21:15:33,723 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 21:15:33,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-12 21:15:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 21:15:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-12 21:15:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 21:15:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-10-12 21:15:33,739 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2020-10-12 21:15:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:15:33,739 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-10-12 21:15:33,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 21:15:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-10-12 21:15:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 21:15:33,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:33,741 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] [2020-10-12 21:15:33,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 21:15:33,742 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times [2020-10-12 21:15:33,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:33,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36826535] [2020-10-12 21:15:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 21:15:33,778 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 21:15:33,778 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 21:15:33,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 21:15:33,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 09:15:33 BoogieIcfgContainer [2020-10-12 21:15:33,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 21:15:33,808 INFO L168 Benchmark]: Toolchain (without parser) took 13340.26 ms. Allocated memory was 141.0 MB in the beginning and 375.9 MB in the end (delta: 234.9 MB). Free memory was 103.7 MB in the beginning and 106.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 231.7 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:33,809 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-12 21:15:33,810 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.60 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 103.5 MB in the beginning and 180.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:33,811 INFO L168 Benchmark]: Boogie Preprocessor took 71.77 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 178.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:33,812 INFO L168 Benchmark]: RCFGBuilder took 618.35 ms. Allocated memory is still 204.5 MB. Free memory was 178.3 MB in the beginning and 143.3 MB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:33,812 INFO L168 Benchmark]: TraceAbstraction took 12249.29 ms. Allocated memory was 204.5 MB in the beginning and 375.9 MB in the end (delta: 171.4 MB). Free memory was 142.7 MB in the beginning and 106.9 MB in the end (delta: 35.8 MB). Peak memory consumption was 207.2 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:33,816 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 394.60 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 103.5 MB in the beginning and 180.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.77 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 178.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 618.35 ms. Allocated memory is still 204.5 MB. Free memory was 178.3 MB in the beginning and 143.3 MB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12249.29 ms. Allocated memory was 204.5 MB in the beginning and 375.9 MB in the end (delta: 171.4 MB). Free memory was 142.7 MB in the beginning and 106.9 MB in the end (delta: 35.8 MB). Peak memory consumption was 207.2 MB. Max. memory is 7.1 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: [L103] CALL, EXPR nondet_tree() [L23] COND FALSE !(__VERIFIER_nondet_bool()) [L26] struct node *n = (struct node *)malloc(sizeof(struct node)); [L27] n->data = __VERIFIER_nondet_int() [L28] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L28] RET, EXPR nondet_tree() [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L29] RET, EXPR nondet_tree() [L29] n->right = nondet_tree() [L30] return n; [L103] RET, EXPR nondet_tree() [L103] CALL task(nondet_tree()) [L81] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->left [L38] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L38] RET, EXPR min(n->left) [L38] int a = min(n->left); [L39] EXPR n->right [L39] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->right) [L39] int b = min(n->right); [L40] COND TRUE a <= b [L40] return a; [L81] RET, EXPR min(t) [L81] int a = min(t); [L82] int b; [L84] CALL, EXPR size(t) [L76] COND FALSE !(!t) [L77] EXPR t->left [L77] CALL, EXPR size(t->left) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->left) [L77] EXPR t->right [L77] CALL, EXPR size(t->right) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->right) [L77] return size(t->left) + size(t->right) + 1; [L84] RET, EXPR size(t) [L84] int n = size(t); [L85] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L85] RET assume_abort_if_not(n != 0) [L86] EXPR, FCALL calloc(n, sizeof(int)) [L86] int *x = calloc(n, sizeof(int)); [L87] CALL tree_inorder(t, x, n) [L65] COND FALSE !(!t) [L68] EXPR t->left [L68] CALL, EXPR tree_inorder(t->left, a, i) [L65] COND TRUE !t [L66] return i; [L68] RET, EXPR tree_inorder(t->left, a, i) [L68] i = tree_inorder(t->left, a, i) [L69] EXPR i++ [L69] EXPR t->data [L69] a[i++] = t->data [L70] EXPR t->right [L70] CALL, EXPR tree_inorder(t->right, a, i) [L65] COND TRUE !t [L66] return i; [L70] RET, EXPR tree_inorder(t->right, a, i) [L70] i = tree_inorder(t->right, a, i) [L71] return i; [L87] RET tree_inorder(t, x, n) [L88] EXPR x[0] [L88] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.1s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 333 SDtfs, 506 SDslu, 1075 SDs, 0 SdLazy, 1630 SolverSat, 520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred 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, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 314 NumberOfCodeBlocks, 314 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 219 ConstructedInterpolants, 0 QuantifiedInterpolants, 37228 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...