/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -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-d623d84 [2020-07-21 12:09:28,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:09:28,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:09:28,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:09:28,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:09:28,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:09:28,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:09:28,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:09:28,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:09:28,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:09:28,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:09:28,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:09:28,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:09:28,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:09:28,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:09:28,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:09:28,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:09:28,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:09:28,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:09:28,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:09:28,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:09:28,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:09:28,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:09:28,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:09:28,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:09:28,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:09:28,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:09:28,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:09:28,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:09:28,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:09:28,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:09:28,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:09:28,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:09:28,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:09:28,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:09:28,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:09:28,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:09:28,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:09:28,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:09:28,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:09:28,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:09:28,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:09:28,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:09:28,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:09:28,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:09:28,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:09:28,215 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:09:28,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:09:28,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:09:28,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:09:28,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:09:28,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:09:28,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:09:28,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:09:28,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:09:28,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:09:28,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:09:28,217 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:09:28,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:09:28,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:09:28,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:09:28,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:09:28,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:09:28,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:09:28,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:09:28,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:09:28,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:09:28,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:09:28,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:28,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:09:28,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:09:28,220 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:09:28,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:09:28,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:09:28,526 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:09:28,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:09:28,530 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:09:28,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-07-21 12:09:28,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec629fb9/814b8ddc230d4916a37fe0d3933bf32d/FLAG8d59623b8 [2020-07-21 12:09:29,076 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:09:29,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-07-21 12:09:29,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec629fb9/814b8ddc230d4916a37fe0d3933bf32d/FLAG8d59623b8 [2020-07-21 12:09:29,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec629fb9/814b8ddc230d4916a37fe0d3933bf32d [2020-07-21 12:09:29,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:09:29,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:09:29,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:09:29,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:09:29,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:09:29,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48018f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29, skipping insertion in model container [2020-07-21 12:09:29,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:09:29,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:09:29,710 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-21 12:09:29,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:09:29,741 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:09:29,855 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-21 12:09:29,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:09:29,898 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:09:29,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29 WrapperNode [2020-07-21 12:09:29,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:09:29,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:09:29,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:09:29,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:09:29,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... [2020-07-21 12:09:29,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:09:29,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:09:29,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:09:29,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:09:29,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 12:09:30,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:09:30,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:09:30,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:09:30,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:09:30,032 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-21 12:09:30,032 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-07-21 12:09:30,032 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-07-21 12:09:30,032 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-07-21 12:09:30,033 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-07-21 12:09:30,033 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-21 12:09:30,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:09:30,033 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-21 12:09:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 12:09:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 12:09:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 12:09:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:09:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:09:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:09:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:09:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:09:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:09:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-21 12:09:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 12:09:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 12:09:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 12:09:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-07-21 12:09:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 12:09:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-07-21 12:09:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 12:09:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 12:09:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-07-21 12:09:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-07-21 12:09:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-21 12:09:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 12:09:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-21 12:09:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:09:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:09:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:09:30,552 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:09:30,553 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 12:09:30,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:09:30 BoogieIcfgContainer [2020-07-21 12:09:30,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:09:30,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:09:30,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:09:30,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:09:30,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:09:29" (1/3) ... [2020-07-21 12:09:30,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1111a64c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:09:30, skipping insertion in model container [2020-07-21 12:09:30,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:29" (2/3) ... [2020-07-21 12:09:30,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1111a64c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:09:30, skipping insertion in model container [2020-07-21 12:09:30,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:09:30" (3/3) ... [2020-07-21 12:09:30,570 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-07-21 12:09:30,580 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:09:30,588 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:09:30,602 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:09:30,625 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:09:30,625 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:09:30,625 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:09:30,625 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:09:30,626 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:09:30,626 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:09:30,626 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:09:30,626 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:09:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-07-21 12:09:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 12:09:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:30,658 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] [2020-07-21 12:09:30,659 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times [2020-07-21 12:09:30,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:30,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352311602] [2020-07-21 12:09:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 12:09:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:09:30,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:09:30,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352311602] [2020-07-21 12:09:30,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:09:30,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 12:09:30,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729177493] [2020-07-21 12:09:30,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 12:09:30,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:30,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 12:09:30,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:09:30,879 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 2 states. [2020-07-21 12:09:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:30,918 INFO L93 Difference]: Finished difference Result 161 states and 207 transitions. [2020-07-21 12:09:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:09:30,919 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 44 [2020-07-21 12:09:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:30,931 INFO L225 Difference]: With dead ends: 161 [2020-07-21 12:09:30,931 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 12:09:30,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:09:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 12:09:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 12:09:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 12:09:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-07-21 12:09:30,991 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2020-07-21 12:09:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:30,993 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-07-21 12:09:30,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 12:09:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-07-21 12:09:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 12:09:30,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:30,998 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] [2020-07-21 12:09:31,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:31,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times [2020-07-21 12:09:31,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:31,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390984438] [2020-07-21 12:09:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:31,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:09:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:09:31,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:09:31,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390984438] [2020-07-21 12:09:31,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:09:31,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:09:31,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807700828] [2020-07-21 12:09:31,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:09:31,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:09:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:09:31,401 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 7 states. [2020-07-21 12:09:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:31,462 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-07-21 12:09:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:09:31,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-07-21 12:09:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:31,467 INFO L225 Difference]: With dead ends: 147 [2020-07-21 12:09:31,468 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 12:09:31,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:09:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 12:09:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-21 12:09:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 12:09:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-07-21 12:09:31,492 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2020-07-21 12:09:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:31,493 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-07-21 12:09:31,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:09:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-07-21 12:09:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 12:09:31,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:31,498 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] [2020-07-21 12:09:31,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:31,714 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:31,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times [2020-07-21 12:09:31,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:31,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31761566] [2020-07-21 12:09:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 12:09:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 12:09:31,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:09:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 12:09:32,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31761566] [2020-07-21 12:09:32,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:09:32,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-21 12:09:32,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949378099] [2020-07-21 12:09:32,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:09:32,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:09:32,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:09:32,070 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 9 states. [2020-07-21 12:09:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:32,198 INFO L93 Difference]: Finished difference Result 160 states and 202 transitions. [2020-07-21 12:09:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:09:32,199 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-07-21 12:09:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:32,201 INFO L225 Difference]: With dead ends: 160 [2020-07-21 12:09:32,202 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 12:09:32,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:09:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 12:09:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-07-21 12:09:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-21 12:09:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-07-21 12:09:32,216 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2020-07-21 12:09:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:32,217 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-07-21 12:09:32,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 12:09:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-07-21 12:09:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-21 12:09:32,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:32,220 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] [2020-07-21 12:09:32,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:32,434 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1614566559, now seen corresponding path program 1 times [2020-07-21 12:09:32,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:32,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283183135] [2020-07-21 12:09:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:32,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:09:32,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 12:09:32,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:09:32,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283183135] [2020-07-21 12:09:32,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:09:32,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 12:09:32,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245764339] [2020-07-21 12:09:32,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 12:09:32,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 12:09:32,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 12:09:32,662 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 9 states. [2020-07-21 12:09:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:32,806 INFO L93 Difference]: Finished difference Result 159 states and 201 transitions. [2020-07-21 12:09:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:09:32,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-07-21 12:09:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:32,809 INFO L225 Difference]: With dead ends: 159 [2020-07-21 12:09:32,809 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 12:09:32,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:09:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 12:09:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-07-21 12:09:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 12:09:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-07-21 12:09:32,823 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2020-07-21 12:09:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:32,823 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-07-21 12:09:32,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 12:09:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-07-21 12:09:32,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 12:09:32,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:32,826 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] [2020-07-21 12:09:33,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:33,043 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times [2020-07-21 12:09:33,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:33,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840725733] [2020-07-21 12:09:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 12:09:33,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 12:09:33,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:09:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 12:09:33,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840725733] [2020-07-21 12:09:33,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:09:33,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2020-07-21 12:09:33,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530768784] [2020-07-21 12:09:33,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 12:09:33,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:33,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 12:09:33,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-07-21 12:09:33,455 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 15 states. [2020-07-21 12:09:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:33,766 INFO L93 Difference]: Finished difference Result 149 states and 190 transitions. [2020-07-21 12:09:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:09:33,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-07-21 12:09:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:33,769 INFO L225 Difference]: With dead ends: 149 [2020-07-21 12:09:33,769 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 12:09:33,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-07-21 12:09:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 12:09:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-07-21 12:09:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 12:09:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-07-21 12:09:33,783 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2020-07-21 12:09:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:33,784 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-07-21 12:09:33,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 12:09:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-07-21 12:09:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-21 12:09:33,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:33,786 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] [2020-07-21 12:09:33,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:34,000 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times [2020-07-21 12:09:34,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:34,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308702974] [2020-07-21 12:09:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 12:09:34,172 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 12:09:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 12:09:34,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 12:09:34,283 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 12:09:34,283 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 12:09:34,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:34,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:09:34 BoogieIcfgContainer [2020-07-21 12:09:34,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:09:34,582 INFO L168 Benchmark]: Toolchain (without parser) took 5090.48 ms. Allocated memory was 136.8 MB in the beginning and 252.7 MB in the end (delta: 115.9 MB). Free memory was 101.2 MB in the beginning and 146.6 MB in the end (delta: -45.4 MB). Peak memory consumption was 70.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:09:34,583 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 12:09:34,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.16 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 176.8 MB in the end (delta: -76.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:09:34,585 INFO L168 Benchmark]: Boogie Preprocessor took 69.47 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 173.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:09:34,586 INFO L168 Benchmark]: RCFGBuilder took 589.06 ms. Allocated memory is still 200.3 MB. Free memory was 173.8 MB in the beginning and 139.2 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:09:34,587 INFO L168 Benchmark]: TraceAbstraction took 4020.61 ms. Allocated memory was 200.3 MB in the beginning and 252.7 MB in the end (delta: 52.4 MB). Free memory was 139.2 MB in the beginning and 146.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:09:34,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 405.16 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 100.8 MB in the beginning and 176.8 MB in the end (delta: -76.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.47 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 173.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 589.06 ms. Allocated memory is still 200.3 MB. Free memory was 173.8 MB in the beginning and 139.2 MB in the end (delta: 34.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4020.61 ms. Allocated memory was 200.3 MB in the beginning and 252.7 MB in the end (delta: 52.4 MB). Free memory was 139.2 MB in the beginning and 146.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 45.1 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; VAL [\result={0:0}] [L28] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-2:0}, n={-2:0}, nondet_tree()={0:0}] [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; VAL [\result={0:0}] [L29] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-2:0}, n={-2:0}, nondet_tree()={0:0}] [L29] n->right = nondet_tree() [L30] return n; VAL [\result={-2:0}, malloc(sizeof(struct node))={-2:0}, n={-2:0}] [L103] RET, EXPR nondet_tree() VAL [nondet_tree()={-2:0}] [L103] CALL task(nondet_tree()) VAL [t={-2:0}] [L81] CALL, EXPR min(t) VAL [n={-2:0}] [L35] COND FALSE !(!n) [L38] EXPR n->left VAL [n={-2:0}, n={-2:0}, n->left={0:0}] [L38] CALL, EXPR min(n->left) VAL [n={0:0}] [L35] COND TRUE !n [L36] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L38] RET, EXPR min(n->left) VAL [min(n->left)=2147483647, n={-2:0}, n={-2:0}, n->left={0:0}] [L38] int a = min(n->left); [L39] EXPR n->right VAL [a=2147483647, n={-2:0}, n={-2:0}, n->right={0:0}] [L39] CALL, EXPR min(n->right) VAL [n={0:0}] [L35] COND TRUE !n [L36] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L39] RET, EXPR min(n->right) VAL [a=2147483647, min(n->right)=2147483647, n={-2:0}, n={-2:0}, n->right={0:0}] [L39] int b = min(n->right); [L40] COND TRUE a <= b [L40] return a; VAL [\result=2147483647, a=2147483647, b=2147483647, n={-2:0}, n={-2:0}] [L81] RET, EXPR min(t) VAL [min(t)=2147483647, t={-2:0}, t={-2:0}] [L81] int a = min(t); [L82] int b; VAL [a=2147483647, b={2:0}, t={-2:0}, t={-2:0}] [L84] CALL, EXPR size(t) VAL [t={-2:0}] [L76] COND FALSE !(!t) [L77] EXPR t->left VAL [t={-2:0}, t={-2:0}, t->left={0:0}] [L77] CALL, EXPR size(t->left) VAL [t={0:0}] [L76] COND TRUE !t [L76] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L77] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-2:0}, t={-2:0}, t->left={0:0}] [L77] EXPR t->right VAL [size(t->left)=0, t={-2:0}, t={-2:0}, t->left={0:0}, t->right={0:0}] [L77] CALL, EXPR size(t->right) VAL [t={0:0}] [L76] COND TRUE !t [L76] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L77] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-2:0}, t={-2:0}, t->left={0:0}, t->right={0:0}] [L77] return size(t->left) + size(t->right) + 1; [L84] RET, EXPR size(t) VAL [a=2147483647, b={2:0}, size(t)=1, t={-2:0}, t={-2:0}] [L84] int n = size(t); [L85] CALL assume_abort_if_not(n != 0) VAL [\old(cond)=1] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L85] RET assume_abort_if_not(n != 0) VAL [a=2147483647, b={2:0}, n=1, t={-2:0}, t={-2:0}] [L86] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-1:0}, n=1, t={-2:0}, t={-2:0}] [L86] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-1:0}, n=1, t={-2:0}, t={-2:0}, x={-1:0}] [L87] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-1:0}, t={-2:0}] [L65] COND FALSE !(!t) [L68] EXPR t->left VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={-2:0}, t={-2:0}, t->left={0:0}] [L68] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, t={0:0}] [L65] COND TRUE !t [L66] return i; VAL [\old(i)=1, \result=1, a={-1:0}, a={-1:0}, i=1, t={0:0}, t={0:0}] [L68] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=1, t={-2:0}, t={-2:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L68] i = tree_inorder(t->left, a, i) [L69] EXPR i++ [L69] EXPR t->data [L69] a[i++] = t->data [L70] EXPR t->right VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={-2:0}, t={-2:0}, t->right={0:0}] [L70] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-1:0}, t={0:0}] [L65] COND TRUE !t [L66] return i; VAL [\old(i)=2, \result=2, a={-1:0}, a={-1:0}, i=2, t={0:0}, t={0:0}] [L70] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-1:0}, a={-1:0}, i=2, t={-2:0}, t={-2:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L70] i = tree_inorder(t->right, a, i) [L71] return i; VAL [\old(i)=1, \result=2, a={-1:0}, a={-1:0}, i=2, t={-2:0}, t={-2:0}] [L87] RET tree_inorder(t, x, n) VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-1:0}, n=1, t={-2:0}, t={-2:0}, tree_inorder(t, x, n)=2, x={-1:0}] [L88] EXPR x[0] VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-1:0}, n=1, t={-2:0}, t={-2:0}, x={-1:0}, x[0]=0] [L88] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L14] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L14] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 526 SDtfs, 104 SDslu, 2638 SDs, 0 SdLazy, 417 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 434 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s 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: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 417 ConstructedInterpolants, 0 QuantifiedInterpolants, 58905 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1370 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 103/111 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...