/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:33:07,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:33:07,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:33:07,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:33:07,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:33:07,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:33:07,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:33:07,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:33:07,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:33:07,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:33:07,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:33:07,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:33:07,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:33:07,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:33:07,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:33:07,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:33:08,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:33:08,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:33:08,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:33:08,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:33:08,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:33:08,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:33:08,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:33:08,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:33:08,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:33:08,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:33:08,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:33:08,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:33:08,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:33:08,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:33:08,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:33:08,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:33:08,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:33:08,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:33:08,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:33:08,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:33:08,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:33:08,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:33:08,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:33:08,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:33:08,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:33:08,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:33:08,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:33:08,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:33:08,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:33:08,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:33:08,100 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:33:08,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:33:08,101 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:33:08,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:33:08,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:33:08,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:33:08,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:33:08,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:33:08,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:33:08,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:33:08,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:33:08,104 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:33:08,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:33:08,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:33:08,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:33:08,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:33:08,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:33:08,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:33:08,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:33:08,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:33:08,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:33:08,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:33:08,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:33:08,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:33:08,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:33:08,107 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.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:33:08,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:33:08,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:33:08,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:33:08,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:33:08,590 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:33:08,591 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-09-21 11:33:08,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/deed422d1/00a298a7820f404e99ce337f30375882/FLAG6d31e3429 [2020-09-21 11:33:09,201 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:33:09,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-09-21 11:33:09,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/deed422d1/00a298a7820f404e99ce337f30375882/FLAG6d31e3429 [2020-09-21 11:33:09,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/deed422d1/00a298a7820f404e99ce337f30375882 [2020-09-21 11:33:09,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:33:09,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:33:09,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:33:09,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:33:09,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:33:09,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:33:09" (1/1) ... [2020-09-21 11:33:09,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2b9410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:09, skipping insertion in model container [2020-09-21 11:33:09,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:33:09" (1/1) ... [2020-09-21 11:33:09,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:33:09,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:33:09,808 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 11:33:09,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:33:09,843 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:33:09,959 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 11:33:09,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:33:10,005 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:33:10,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10 WrapperNode [2020-09-21 11:33:10,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:33:10,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:33:10,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:33:10,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:33:10,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... [2020-09-21 11:33:10,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... [2020-09-21 11:33:10,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... [2020-09-21 11:33:10,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... [2020-09-21 11:33:10,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... [2020-09-21 11:33:10,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... [2020-09-21 11:33:10,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... [2020-09-21 11:33:10,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:33:10,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:33:10,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:33:10,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:33:10,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:33:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:33:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:33:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:33:10,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:33:10,158 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-21 11:33:10,158 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-09-21 11:33:10,158 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-09-21 11:33:10,158 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-09-21 11:33:10,158 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-09-21 11:33:10,159 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-21 11:33:10,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:33:10,159 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-21 11:33:10,159 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:33:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:33:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:33:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:33:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:33:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:33:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:33:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:33:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:33:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-21 11:33:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:33:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:33:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:33:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-09-21 11:33:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:33:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-09-21 11:33:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:33:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:33:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-09-21 11:33:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-09-21 11:33:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-21 11:33:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:33:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-21 11:33:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:33:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:33:10,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:33:10,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:33:10,694 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 11:33:10,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:33:10 BoogieIcfgContainer [2020-09-21 11:33:10,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:33:10,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:33:10,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:33:10,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:33:10,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:33:09" (1/3) ... [2020-09-21 11:33:10,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779a44df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:33:10, skipping insertion in model container [2020-09-21 11:33:10,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:33:10" (2/3) ... [2020-09-21 11:33:10,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779a44df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:33:10, skipping insertion in model container [2020-09-21 11:33:10,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:33:10" (3/3) ... [2020-09-21 11:33:10,714 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-09-21 11:33:10,727 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:33:10,738 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:33:10,762 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:33:10,797 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:33:10,797 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:33:10,798 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:33:10,798 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:33:10,798 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:33:10,798 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:33:10,798 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:33:10,799 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:33:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-09-21 11:33:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:33:10,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:10,840 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] [2020-09-21 11:33:10,841 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times [2020-09-21 11:33:10,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:10,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563137927] [2020-09-21 11:33:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,081 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,082 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,082 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,082 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 11:33:11,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:33:11,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-21 11:33:11,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:11,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,181 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,181 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,182 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,182 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:11,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:11,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:11,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:11,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:33:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,221 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,222 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,222 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,222 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:11,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:11,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:11,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:11,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:33:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,238 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,238 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,239 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,239 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:11,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:11,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:11,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:11,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:33:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,248 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,248 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,249 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,249 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:11,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:11,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:11,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:11,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:33:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,259 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,259 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,259 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,260 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:11,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:33:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:11,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:33:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,278 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,279 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,279 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,279 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:11,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:11,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:33:11,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:11,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:33:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:11,307 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:11,307 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:11,307 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:11,308 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:11,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:11,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:11,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:11,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:11,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:11,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:11,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:11,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:11,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563137927] [2020-09-21 11:33:11,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:11,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:33:11,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722027291] [2020-09-21 11:33:11,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:33:11,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:33:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:33:11,362 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-09-21 11:33:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:11,854 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2020-09-21 11:33:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:33:11,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-09-21 11:33:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:11,873 INFO L225 Difference]: With dead ends: 168 [2020-09-21 11:33:11,874 INFO L226 Difference]: Without dead ends: 95 [2020-09-21 11:33:11,879 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 [2020-09-21 11:33:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-21 11:33:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-09-21 11:33:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 11:33:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-09-21 11:33:11,954 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2020-09-21 11:33:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:11,955 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-09-21 11:33:11,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:33:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-09-21 11:33:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:33:11,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:11,959 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] [2020-09-21 11:33:11,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:33:11,960 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:11,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times [2020-09-21 11:33:11,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:11,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748524361] [2020-09-21 11:33:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,110 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,110 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,111 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 11:33:12,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 11:33:12,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:33:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 11:33:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:33:12,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,230 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,230 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,231 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,231 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:12,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:12,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:12,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:33:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,270 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,271 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,271 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,271 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:12,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:12,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:12,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:33:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,280 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,280 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,280 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,280 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:12,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:12,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:12,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:12,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:12,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:12,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:33:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,292 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,293 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,293 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,293 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:12,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:33:12,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:33:12,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:12,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:33:12,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:12,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:33:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,324 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,325 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,325 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,325 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:12,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:33:12,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:12,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:33:12,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:12,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:12,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:33:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,380 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,380 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,380 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,381 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:12,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:12,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:12,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:33:12,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:12,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:12,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:33:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:12,407 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:12,407 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:12,407 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:12,408 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:12,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:12,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:12,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:12,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:12,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:12,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748524361] [2020-09-21 11:33:12,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:12,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 11:33:12,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325053870] [2020-09-21 11:33:12,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:33:12,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:33:12,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:33:12,421 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-09-21 11:33:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:13,208 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2020-09-21 11:33:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:33:13,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-21 11:33:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:13,212 INFO L225 Difference]: With dead ends: 154 [2020-09-21 11:33:13,212 INFO L226 Difference]: Without dead ends: 97 [2020-09-21 11:33:13,214 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 [2020-09-21 11:33:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-21 11:33:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-09-21 11:33:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-21 11:33:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-09-21 11:33:13,239 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2020-09-21 11:33:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:13,240 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-09-21 11:33:13,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:33:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-09-21 11:33:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 11:33:13,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:13,243 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] [2020-09-21 11:33:13,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:33:13,243 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times [2020-09-21 11:33:13,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:13,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809821545] [2020-09-21 11:33:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,294 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,295 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,295 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,295 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-21 11:33:13,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:33:13,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:33:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:33:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:33:13,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,461 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,462 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,462 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,462 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:13,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:13,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:13,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:13,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:13,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:33:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,504 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,504 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,504 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,504 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:13,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 11:33:13,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:33:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:33:13,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:13,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:33:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,536 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,536 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,537 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,537 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:13,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:33:13,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:13,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:33:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,577 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,577 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,577 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,578 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:33:13,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:33:13,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:33:13,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:33:13,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:33:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,639 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,640 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,640 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,640 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:13,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:13,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:13,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:13,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:13,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:33:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,650 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,650 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,650 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,650 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:13,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:13,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:13,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:13,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:13,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 11:33:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,658 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,658 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,658 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,659 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:13,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:13,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 11:33:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,679 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,679 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,679 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,679 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:13,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:13,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:13,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:33:13,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:13,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-21 11:33:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:13,704 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:13,705 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:13,705 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:13,705 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:13,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:13,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:13,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:13,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:13,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:13,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:13,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:13,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 11:33:13,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809821545] [2020-09-21 11:33:13,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:13,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:33:13,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765086997] [2020-09-21 11:33:13,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:33:13,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:13,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:33:13,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:33:13,719 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 12 states. [2020-09-21 11:33:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:14,597 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2020-09-21 11:33:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:33:14,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-09-21 11:33:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:14,600 INFO L225 Difference]: With dead ends: 164 [2020-09-21 11:33:14,600 INFO L226 Difference]: Without dead ends: 96 [2020-09-21 11:33:14,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:33:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-21 11:33:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-09-21 11:33:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-21 11:33:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-09-21 11:33:14,619 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2020-09-21 11:33:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:14,619 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-09-21 11:33:14,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:33:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-09-21 11:33:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 11:33:14,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:14,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:14,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:33:14,623 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:14,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:14,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1614566559, now seen corresponding path program 1 times [2020-09-21 11:33:14,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:14,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370666512] [2020-09-21 11:33:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,684 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,684 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,685 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,685 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-21 11:33:14,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:33:14,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:33:14,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:33:14,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:33:14,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,735 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,735 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,735 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,735 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:14,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:14,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:14,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:14,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:33:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,801 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,801 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,801 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,802 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:33:14,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-21 11:33:14,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:33:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:33:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,841 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,842 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,842 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,842 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:14,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:14,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:33:14,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:33:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,851 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,851 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,851 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,852 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:14,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:33:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:33:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,863 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,863 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,863 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:14,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:33:14,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:33:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:33:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,914 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,914 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,915 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,915 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:33:14,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:33:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:14,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:33:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,923 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,923 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,923 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,923 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:14,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:14,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:14,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:14,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:33:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,929 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,929 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,929 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,930 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:14,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:14,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:14,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 11:33:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,936 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,936 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,936 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,937 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:14,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:14,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:14,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:14,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 11:33:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,955 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,956 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,956 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,956 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:14,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:14,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:33:14,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:14,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 11:33:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:14,984 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:14,984 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:14,984 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:14,985 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:14,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:14,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:14,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:14,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:33:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:14,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-21 11:33:14,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370666512] [2020-09-21 11:33:14,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:14,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-21 11:33:14,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483746516] [2020-09-21 11:33:14,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:33:14,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:33:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:33:14,998 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 13 states. [2020-09-21 11:33:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:15,824 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2020-09-21 11:33:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:33:15,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-09-21 11:33:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:15,828 INFO L225 Difference]: With dead ends: 163 [2020-09-21 11:33:15,828 INFO L226 Difference]: Without dead ends: 98 [2020-09-21 11:33:15,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:33:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-21 11:33:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-09-21 11:33:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-21 11:33:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-21 11:33:15,847 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2020-09-21 11:33:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:15,848 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-21 11:33:15,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:33:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-21 11:33:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 11:33:15,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:15,851 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] [2020-09-21 11:33:15,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:33:15,851 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times [2020-09-21 11:33:15,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:15,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326783003] [2020-09-21 11:33:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:15,931 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:15,931 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:15,931 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:15,931 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:15,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-21 11:33:15,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:15,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 11:33:15,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:15,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:33:15,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:33:15,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 11:33:15,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,036 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,036 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,036 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,036 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:16,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:16,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:16,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:33:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,098 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,099 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,099 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,099 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:33:16,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:33:16,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:16,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:33:16,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:33:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,151 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,152 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,152 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,152 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:16,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:33:16,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:33:16,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:16,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:33:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,166 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,167 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,167 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,167 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:16,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:16,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:16,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:33:16,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:33:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,183 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,184 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,184 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,184 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:33:16,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:16,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:33:16,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:16,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:33:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,199 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,199 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,200 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,200 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:16,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:33:16,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:16,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:16,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:16,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:33:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,207 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,207 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,207 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,208 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:16,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:16,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:16,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:16,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:16,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 11:33:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,220 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,221 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,221 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,221 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:33:16,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:16,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:16,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:33:16,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:16,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:33:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,232 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,233 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,233 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,233 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:16,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:33:16,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:16,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:33:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,238 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,239 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,239 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,239 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:16,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:16,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:16,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:16,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 11:33:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,258 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,258 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,259 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,264 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:16,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 11:33:16,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:16,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:16,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 11:33:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,293 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,294 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,294 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,294 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:16,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:16,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:33:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:33:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:16,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 11:33:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,327 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,327 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,328 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,328 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:33:16,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:33:16,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:33:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:33:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:33:16,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-21 11:33:16,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326783003] [2020-09-21 11:33:16,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:33:16,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-21 11:33:16,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177494032] [2020-09-21 11:33:16,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:33:16,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:16,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:33:16,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:33:16,368 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 13 states. [2020-09-21 11:33:17,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:17,172 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2020-09-21 11:33:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:33:17,173 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-09-21 11:33:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:17,175 INFO L225 Difference]: With dead ends: 151 [2020-09-21 11:33:17,175 INFO L226 Difference]: Without dead ends: 98 [2020-09-21 11:33:17,177 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 [2020-09-21 11:33:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-21 11:33:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-09-21 11:33:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 11:33:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-09-21 11:33:17,197 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2020-09-21 11:33:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:17,198 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-09-21 11:33:17,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:33:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-09-21 11:33:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 11:33:17,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:17,207 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] [2020-09-21 11:33:17,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:33:17,207 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:17,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times [2020-09-21 11:33:17,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:17,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107649417] [2020-09-21 11:33:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:33:17,310 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:33:17,310 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:33:17,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:33:17,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:33:17 BoogieIcfgContainer [2020-09-21 11:33:17,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:33:17,347 INFO L168 Benchmark]: Toolchain (without parser) took 7817.99 ms. Allocated memory was 139.5 MB in the beginning and 329.8 MB in the end (delta: 190.3 MB). Free memory was 102.5 MB in the beginning and 291.4 MB in the end (delta: -188.9 MB). Peak memory consumption was 166.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:17,348 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:33:17,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 474.96 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 179.8 MB in the end (delta: -78.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:17,350 INFO L168 Benchmark]: Boogie Preprocessor took 66.97 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 177.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:17,350 INFO L168 Benchmark]: RCFGBuilder took 626.78 ms. Allocated memory is still 203.4 MB. Free memory was 177.1 MB in the beginning and 142.1 MB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:17,351 INFO L168 Benchmark]: TraceAbstraction took 6641.09 ms. Allocated memory was 203.4 MB in the beginning and 329.8 MB in the end (delta: 126.4 MB). Free memory was 141.4 MB in the beginning and 291.4 MB in the end (delta: -149.9 MB). Peak memory consumption was 141.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:33:17,355 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 474.96 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 179.8 MB in the end (delta: -78.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.97 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 177.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 626.78 ms. Allocated memory is still 203.4 MB. Free memory was 177.1 MB in the beginning and 142.1 MB in the end (delta: 35.0 MB). Peak memory consumption was 35.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6641.09 ms. Allocated memory was 203.4 MB in the beginning and 329.8 MB in the end (delta: 126.4 MB). Free memory was 141.4 MB in the beginning and 291.4 MB in the end (delta: -149.9 MB). Peak memory consumption was 141.0 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: 6.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 418 SDtfs, 667 SDslu, 1336 SDs, 0 SdLazy, 1975 SolverSat, 666 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s 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, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 47183 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 64/66 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...