/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:14:12,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:14:12,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:14:12,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:14:12,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:14:12,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:14:12,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:14:12,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:14:12,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:14:12,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:14:12,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:14:12,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:14:12,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:14:12,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:14:12,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:14:12,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:14:12,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:14:12,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:14:12,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:14:12,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:14:12,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:14:12,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:14:12,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:14:12,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:14:12,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:14:12,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:14:12,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:14:12,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:14:12,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:14:12,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:14:12,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:14:12,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:14:12,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:14:12,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:14:12,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:14:12,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:14:12,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:14:12,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:14:12,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:14:12,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:14:12,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:14:12,887 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 [2020-07-07 11:14:12,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:14:12,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:14:12,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:14:12,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:14:12,904 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:14:12,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:14:12,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:14:12,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:14:12,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:14:12,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:14:12,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:14:12,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:14:12,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:14:12,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:14:12,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:14:12,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:14:12,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:14:12,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:14:12,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:14:12,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:14:12,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:14:12,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:14:12,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:14:12,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:14:12,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:14:12,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:14:12,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:14:12,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:14:12,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:14:12,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:14:13,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:14:13,254 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:14:13,258 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:14:13,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:14:13,260 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:14:13,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-07-07 11:14:13,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac7df0b9/a21e756db2b34095a4c25486d5a7ba19/FLAGd74718dd7 [2020-07-07 11:14:13,904 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:14:13,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-07-07 11:14:13,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac7df0b9/a21e756db2b34095a4c25486d5a7ba19/FLAGd74718dd7 [2020-07-07 11:14:14,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ac7df0b9/a21e756db2b34095a4c25486d5a7ba19 [2020-07-07 11:14:14,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:14:14,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:14:14,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:14:14,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:14:14,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:14:14,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78645f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14, skipping insertion in model container [2020-07-07 11:14:14,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:14:14,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:14:14,535 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 11:14:14,537 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 11:14:14,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:14:14,577 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:14:14,710 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 11:14:14,712 WARN L1484 CHandler]: Possible shadowing of function min [2020-07-07 11:14:14,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:14:14,748 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:14:14,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14 WrapperNode [2020-07-07 11:14:14,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:14:14,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:14:14,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:14:14,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:14:14,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (1/1) ... [2020-07-07 11:14:14,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:14:14,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:14:14,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:14:14,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:14:14,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (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 [2020-07-07 11:14:14,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:14:14,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:14:14,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-07-07 11:14:14,896 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:14:14,896 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-07-07 11:14:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-07-07 11:14:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-07-07 11:14:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-07-07 11:14:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-07-07 11:14:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-07-07 11:14:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:14:14,898 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-07 11:14:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 11:14:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:14:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 11:14:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:14:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-07 11:14:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-07-07 11:14:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:14:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:14:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-07-07 11:14:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:14:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:14:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 11:14:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-07-07 11:14:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:14:14,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 11:14:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-07-07 11:14:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:14:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-07-07 11:14:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-07-07 11:14:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-07-07 11:14:14,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:14:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-07 11:14:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:14:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:14:14,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:14:15,530 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:14:15,531 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 11:14:15,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:14:15 BoogieIcfgContainer [2020-07-07 11:14:15,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:14:15,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:14:15,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:14:15,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:14:15,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:14:14" (1/3) ... [2020-07-07 11:14:15,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7983a677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:14:15, skipping insertion in model container [2020-07-07 11:14:15,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:14:14" (2/3) ... [2020-07-07 11:14:15,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7983a677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:14:15, skipping insertion in model container [2020-07-07 11:14:15,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:14:15" (3/3) ... [2020-07-07 11:14:15,549 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-07-07 11:14:15,561 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:14:15,570 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:14:15,582 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:14:15,612 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:14:15,612 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:14:15,612 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:14:15,612 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:14:15,613 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:14:15,613 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:14:15,613 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:14:15,613 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:14:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-07-07 11:14:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 11:14:15,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:15,651 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] [2020-07-07 11:14:15,652 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1057238675, now seen corresponding path program 1 times [2020-07-07 11:14:15,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:15,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267229384] [2020-07-07 11:14:15,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:14:16,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267229384] [2020-07-07 11:14:16,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:14:16,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 11:14:16,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389008997] [2020-07-07 11:14:16,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:14:16,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:16,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:14:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:14:16,325 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 11 states. [2020-07-07 11:14:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:17,319 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-07-07 11:14:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:14:17,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-07-07 11:14:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:17,339 INFO L225 Difference]: With dead ends: 171 [2020-07-07 11:14:17,340 INFO L226 Difference]: Without dead ends: 96 [2020-07-07 11:14:17,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:14:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-07 11:14:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-07-07 11:14:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-07 11:14:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2020-07-07 11:14:17,428 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 44 [2020-07-07 11:14:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:17,429 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2020-07-07 11:14:17,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:14:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2020-07-07 11:14:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-07 11:14:17,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:17,434 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] [2020-07-07 11:14:17,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:14:17,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:17,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1861604494, now seen corresponding path program 1 times [2020-07-07 11:14:17,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:17,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753845742] [2020-07-07 11:14:17,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:14:18,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753845742] [2020-07-07 11:14:18,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93273480] [2020-07-07 11:14:18,016 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:18,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-07 11:14:18,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:14:18,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:18,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 14 [2020-07-07 11:14:18,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278094274] [2020-07-07 11:14:18,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:14:18,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:14:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:14:18,432 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand 14 states. [2020-07-07 11:14:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:19,606 INFO L93 Difference]: Finished difference Result 162 states and 208 transitions. [2020-07-07 11:14:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:14:19,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-07-07 11:14:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:19,615 INFO L225 Difference]: With dead ends: 162 [2020-07-07 11:14:19,616 INFO L226 Difference]: Without dead ends: 95 [2020-07-07 11:14:19,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:14:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-07 11:14:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-07-07 11:14:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-07 11:14:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-07-07 11:14:19,652 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 56 [2020-07-07 11:14:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:19,653 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-07-07 11:14:19,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:14:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-07-07 11:14:19,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-07 11:14:19,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:19,657 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] [2020-07-07 11:14:19,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:14:19,859 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:19,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1883823467, now seen corresponding path program 1 times [2020-07-07 11:14:19,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:19,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753881503] [2020-07-07 11:14:19,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:14:20,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753881503] [2020-07-07 11:14:20,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:14:20,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 11:14:20,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662159591] [2020-07-07 11:14:20,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:14:20,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:20,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:14:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:14:20,231 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 13 states. [2020-07-07 11:14:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:21,079 INFO L93 Difference]: Finished difference Result 161 states and 207 transitions. [2020-07-07 11:14:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:14:21,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-07-07 11:14:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:21,087 INFO L225 Difference]: With dead ends: 161 [2020-07-07 11:14:21,088 INFO L226 Difference]: Without dead ends: 97 [2020-07-07 11:14:21,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:14:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-07 11:14:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-07-07 11:14:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-07 11:14:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-07-07 11:14:21,110 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 66 [2020-07-07 11:14:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:21,111 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-07-07 11:14:21,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:14:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-07-07 11:14:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 11:14:21,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:21,115 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] [2020-07-07 11:14:21,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:14:21,115 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1030140767, now seen corresponding path program 1 times [2020-07-07 11:14:21,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:21,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763434396] [2020-07-07 11:14:21,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-07 11:14:21,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763434396] [2020-07-07 11:14:21,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360920989] [2020-07-07 11:14:21,490 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:21,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-07 11:14:21,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-07 11:14:21,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:21,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2020-07-07 11:14:21,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633483446] [2020-07-07 11:14:21,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:14:21,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:21,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:14:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:14:21,789 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 18 states. [2020-07-07 11:14:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:23,217 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2020-07-07 11:14:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 11:14:23,217 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-07 11:14:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:23,221 INFO L225 Difference]: With dead ends: 151 [2020-07-07 11:14:23,221 INFO L226 Difference]: Without dead ends: 99 [2020-07-07 11:14:23,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 11:14:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-07 11:14:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-07-07 11:14:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-07 11:14:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-07-07 11:14:23,246 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 79 [2020-07-07 11:14:23,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:23,246 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-07-07 11:14:23,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:14:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-07-07 11:14:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 11:14:23,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:23,251 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] [2020-07-07 11:14:23,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:23,459 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash -299285422, now seen corresponding path program 1 times [2020-07-07 11:14:23,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:23,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158043233] [2020-07-07 11:14:23,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:14:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:14:23,570 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:14:23,570 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:14:23,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:14:23,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:14:23 BoogieIcfgContainer [2020-07-07 11:14:23,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:14:23,644 INFO L168 Benchmark]: Toolchain (without parser) took 9349.75 ms. Allocated memory was 134.7 MB in the beginning and 308.8 MB in the end (delta: 174.1 MB). Free memory was 98.7 MB in the beginning and 152.5 MB in the end (delta: -53.8 MB). Peak memory consumption was 120.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:23,645 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:14:23,648 INFO L168 Benchmark]: CACSL2BoogieTranslator took 457.91 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 98.5 MB in the beginning and 175.0 MB in the end (delta: -76.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:23,649 INFO L168 Benchmark]: Boogie Preprocessor took 75.80 ms. Allocated memory is still 199.2 MB. Free memory was 175.0 MB in the beginning and 172.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:23,650 INFO L168 Benchmark]: RCFGBuilder took 711.59 ms. Allocated memory is still 199.2 MB. Free memory was 172.9 MB in the beginning and 138.4 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:23,653 INFO L168 Benchmark]: TraceAbstraction took 8098.46 ms. Allocated memory was 199.2 MB in the beginning and 308.8 MB in the end (delta: 109.6 MB). Free memory was 137.7 MB in the beginning and 152.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 94.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:23,661 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 457.91 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 98.5 MB in the beginning and 175.0 MB in the end (delta: -76.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.80 ms. Allocated memory is still 199.2 MB. Free memory was 175.0 MB in the beginning and 172.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 711.59 ms. Allocated memory is still 199.2 MB. Free memory was 172.9 MB in the beginning and 138.4 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8098.46 ms. Allocated memory was 199.2 MB in the beginning and 308.8 MB in the end (delta: 109.6 MB). Free memory was 137.7 MB in the beginning and 152.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 94.8 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: [L100] 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))={-1:0}, n={-1:0}, 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))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L29] n->right = nondet_tree() [L30] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L100] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L100] CALL task(nondet_tree()) VAL [t={-1:0}] [L76] CALL, EXPR min(t) VAL [n={-1:0}] [L35] COND FALSE !(!n) [L38] EXPR n->data [L38] int a = n->data; [L39] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L39] 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}] [L39] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L39] int b = min(n->left); [L40] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L40] 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}] [L40] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L40] int c = min(n->right); [L41] COND TRUE b <= a && b <= c [L41] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L76] RET, EXPR min(t) VAL [min(t)=2147483647, t={-1:0}, t={-1:0}] [L76] int a = min(t); [L77] int b; VAL [a=2147483647, b={2:0}, t={-1:0}, t={-1:0}] [L79] CALL, EXPR size(t) VAL [t={-1:0}] [L71] COND FALSE !(!t) [L72] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L72] CALL, EXPR size(t->left) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L72] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L72] CALL, EXPR size(t->right) VAL [t={0:0}] [L71] COND TRUE !t [L71] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L72] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) VAL [a=2147483647, b={2:0}, size(t)=1, t={-1:0}, t={-1:0}] [L79] int n = size(t); [L80] CALL assume_cycle_if_not(n != 0) VAL [\old(cond)=1] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L80] RET assume_cycle_if_not(n != 0) VAL [a=2147483647, b={2:0}, n=1, t={-1:0}, t={-1:0}] [L81] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}] [L81] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}] [L82] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L60] COND FALSE !(!t) [L63] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L63] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L63] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L65] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L60] COND TRUE !t [L61] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L65] i = tree_inorder(t->right, a, i) [L66] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L82] RET tree_inorder(t, x, n) VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, tree_inorder(t, x, n)=2, x={-2:0}] [L83] EXPR x[0] VAL [a=2147483647, b={2:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}, x[0]=0] [L83] 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, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 350 SDtfs, 582 SDslu, 1695 SDs, 0 SdLazy, 2251 SolverSat, 551 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 289 GetRequests, 199 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 471 NumberOfCodeBlocks, 471 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 374 ConstructedInterpolants, 0 QuantifiedInterpolants, 71968 SizeOfPredicates, 16 NumberOfNonLiveVariables, 633 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 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...