/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_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:37:08,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:37:08,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:37:08,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:37:08,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:37:08,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:37:08,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:37:08,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:37:08,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:37:08,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:37:08,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:37:08,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:37:08,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:37:08,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:37:08,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:37:08,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:37:08,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:37:08,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:37:08,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:37:08,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:37:08,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:37:08,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:37:08,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:37:08,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:37:08,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:37:08,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:37:08,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:37:08,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:37:08,873 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 [2020-08-22 16:37:08,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:37:08,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:37:08,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:37:08,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:37:08,897 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:37:08,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:37:08,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:37:08,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:37:08,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:37:08,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:37:08,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:37:08,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:37:08,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:37:08,899 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:37:08,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:37:08,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:37:08,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:37:08,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:37:08,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:37:08,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:37:08,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:37:08,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:37:08,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:37:08,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:37:08,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:37:08,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:37:08,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:37:08,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:37:08,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:37:08,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:37:09,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:37:09,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:37:09,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:37:09,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:37:09,227 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:37:09,228 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-08-22 16:37:09,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3ef925a1/b728e0ea32034cce97f81b0257d4cebe/FLAGe191acb74 [2020-08-22 16:37:09,794 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:37:09,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-08-22 16:37:09,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3ef925a1/b728e0ea32034cce97f81b0257d4cebe/FLAGe191acb74 [2020-08-22 16:37:10,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3ef925a1/b728e0ea32034cce97f81b0257d4cebe [2020-08-22 16:37:10,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:37:10,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:37:10,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:37:10,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:37:10,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:37:10,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4830116a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10, skipping insertion in model container [2020-08-22 16:37:10,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:37:10,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:37:10,464 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 16:37:10,467 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 16:37:10,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:37:10,540 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:37:10,660 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 16:37:10,663 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 16:37:10,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:37:10,728 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:37:10,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10 WrapperNode [2020-08-22 16:37:10,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:37:10,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:37:10,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:37:10,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:37:10,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (1/1) ... [2020-08-22 16:37:10,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:37:10,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:37:10,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:37:10,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:37:10,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (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 [2020-08-22 16:37:10,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:37:10,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:37:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:37:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:37:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-22 16:37:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-22 16:37:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-22 16:37:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-22 16:37:10,859 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-22 16:37:10,859 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-22 16:37:10,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:37:10,859 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-22 16:37:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 16:37:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:37:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 16:37:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:37:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 16:37:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:37:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:37:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:37:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:37:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-22 16:37:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:37:10,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:37:10,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 16:37:10,862 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-22 16:37:10,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 16:37:10,862 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-22 16:37:10,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:37:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:37:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-22 16:37:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-22 16:37:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-22 16:37:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:37:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-22 16:37:10,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:37:10,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:37:10,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:37:11,405 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:37:11,405 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:37:11,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:37:11 BoogieIcfgContainer [2020-08-22 16:37:11,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:37:11,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:37:11,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:37:11,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:37:11,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:37:10" (1/3) ... [2020-08-22 16:37:11,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc55cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:37:11, skipping insertion in model container [2020-08-22 16:37:11,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:37:10" (2/3) ... [2020-08-22 16:37:11,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc55cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:37:11, skipping insertion in model container [2020-08-22 16:37:11,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:37:11" (3/3) ... [2020-08-22 16:37:11,427 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-08-22 16:37:11,438 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:37:11,449 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:37:11,464 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:37:11,491 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:37:11,491 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:37:11,492 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:37:11,492 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:37:11,492 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:37:11,493 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:37:11,493 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:37:11,493 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:37:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-08-22 16:37:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 16:37:11,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:37:11,527 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] [2020-08-22 16:37:11,528 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:37:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:37:11,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1217563597, now seen corresponding path program 1 times [2020-08-22 16:37:11,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:37:11,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507749858] [2020-08-22 16:37:11,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:37:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:37:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:37:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 16:37:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:37:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:37:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:37:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:37:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:37:11,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507749858] [2020-08-22 16:37:11,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:37:11,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:37:11,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541867729] [2020-08-22 16:37:11,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:37:11,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:37:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:37:11,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:37:11,915 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 6 states. [2020-08-22 16:37:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:37:12,396 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2020-08-22 16:37:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:37:12,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-08-22 16:37:12,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:37:12,412 INFO L225 Difference]: With dead ends: 165 [2020-08-22 16:37:12,413 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 16:37:12,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:37:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 16:37:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-08-22 16:37:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 16:37:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-08-22 16:37:12,482 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 44 [2020-08-22 16:37:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:37:12,483 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-08-22 16:37:12,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:37:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-08-22 16:37:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 16:37:12,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:37:12,487 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] [2020-08-22 16:37:12,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:37:12,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:37:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:37:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash -471380145, now seen corresponding path program 1 times [2020-08-22 16:37:12,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:37:12,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071209604] [2020-08-22 16:37:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:37:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:37:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:37:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 16:37:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:37:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 16:37:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 16:37:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 16:37:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:37:12,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071209604] [2020-08-22 16:37:12,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:37:12,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 16:37:12,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398657143] [2020-08-22 16:37:12,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:37:12,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:37:12,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:37:12,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:37:12,736 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 11 states. [2020-08-22 16:37:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:37:13,421 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2020-08-22 16:37:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:37:13,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-22 16:37:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:37:13,428 INFO L225 Difference]: With dead ends: 151 [2020-08-22 16:37:13,428 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 16:37:13,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:37:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 16:37:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-08-22 16:37:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 16:37:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-08-22 16:37:13,453 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 44 [2020-08-22 16:37:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:37:13,454 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-08-22 16:37:13,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:37:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-08-22 16:37:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 16:37:13,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:37:13,457 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] [2020-08-22 16:37:13,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:37:13,457 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:37:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:37:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash 800610240, now seen corresponding path program 1 times [2020-08-22 16:37:13,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:37:13,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635386433] [2020-08-22 16:37:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:37:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:37:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:37:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 16:37:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 16:37:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:37:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 16:37:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 16:37:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 16:37:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 16:37:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:37:13,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635386433] [2020-08-22 16:37:13,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978972598] [2020-08-22 16:37:13,713 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 -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 [2020-08-22 16:37:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 25 conjunts are in the unsatisfiable core [2020-08-22 16:37:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:37:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 16:37:13,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:37:13,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 13 [2020-08-22 16:37:13,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559072619] [2020-08-22 16:37:13,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:37:13,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:37:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:37:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:37:13,912 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 13 states. [2020-08-22 16:37:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:37:14,763 INFO L93 Difference]: Finished difference Result 161 states and 206 transitions. [2020-08-22 16:37:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:37:14,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-08-22 16:37:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:37:14,766 INFO L225 Difference]: With dead ends: 161 [2020-08-22 16:37:14,767 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 16:37:14,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:37:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 16:37:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-08-22 16:37:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 16:37:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-08-22 16:37:14,784 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56 [2020-08-22 16:37:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:37:14,784 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-08-22 16:37:14,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:37:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-08-22 16:37:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 16:37:14,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:37:14,787 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] [2020-08-22 16:37:14,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 16:37:15,000 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:37:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:37:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash 487198237, now seen corresponding path program 1 times [2020-08-22 16:37:15,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:37:15,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536092134] [2020-08-22 16:37:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:37:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:37:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:37:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:37:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:37:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 16:37:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 16:37:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:37:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 16:37:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 16:37:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 16:37:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 16:37:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-22 16:37:15,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536092134] [2020-08-22 16:37:15,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:37:15,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 16:37:15,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403136821] [2020-08-22 16:37:15,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:37:15,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:37:15,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:37:15,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:37:15,341 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 13 states. [2020-08-22 16:37:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:37:16,036 INFO L93 Difference]: Finished difference Result 160 states and 205 transitions. [2020-08-22 16:37:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 16:37:16,036 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-08-22 16:37:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:37:16,043 INFO L225 Difference]: With dead ends: 160 [2020-08-22 16:37:16,043 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 16:37:16,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:37:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 16:37:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-08-22 16:37:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 16:37:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-08-22 16:37:16,073 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 66 [2020-08-22 16:37:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:37:16,073 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-08-22 16:37:16,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:37:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-08-22 16:37:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 16:37:16,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:37:16,085 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] [2020-08-22 16:37:16,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:37:16,085 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:37:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:37:16,085 INFO L82 PathProgramCache]: Analyzing trace with hash -505239167, now seen corresponding path program 1 times [2020-08-22 16:37:16,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:37:16,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945728474] [2020-08-22 16:37:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:37:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:37:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:37:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 16:37:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:37:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 16:37:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:37:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 16:37:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 16:37:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:37:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 16:37:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 16:37:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 16:37:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 16:37:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:37:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-08-22 16:37:16,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945728474] [2020-08-22 16:37:16,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:37:16,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 16:37:16,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228674238] [2020-08-22 16:37:16,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:37:16,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:37:16,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:37:16,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:37:16,473 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 13 states. [2020-08-22 16:37:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:37:17,213 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2020-08-22 16:37:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:37:17,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-08-22 16:37:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:37:17,216 INFO L225 Difference]: With dead ends: 148 [2020-08-22 16:37:17,220 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 16:37:17,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:37:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 16:37:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-22 16:37:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 16:37:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-08-22 16:37:17,256 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 79 [2020-08-22 16:37:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:37:17,257 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-08-22 16:37:17,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:37:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-08-22 16:37:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 16:37:17,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:37:17,262 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] [2020-08-22 16:37:17,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 16:37:17,263 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:37:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:37:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1062270604, now seen corresponding path program 1 times [2020-08-22 16:37:17,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:37:17,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744502872] [2020-08-22 16:37:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:37:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:37:17,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:37:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:37:17,422 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:37:17,492 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:37:17,492 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:37:17,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 16:37:17,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:37:17 BoogieIcfgContainer [2020-08-22 16:37:17,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:37:17,603 INFO L168 Benchmark]: Toolchain (without parser) took 7428.40 ms. Allocated memory was 140.5 MB in the beginning and 284.7 MB in the end (delta: 144.2 MB). Free memory was 101.6 MB in the beginning and 122.9 MB in the end (delta: -21.2 MB). Peak memory consumption was 122.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:37:17,609 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:37:17,610 INFO L168 Benchmark]: CACSL2BoogieTranslator took 553.43 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 179.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:37:17,611 INFO L168 Benchmark]: Boogie Preprocessor took 53.88 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 177.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:37:17,612 INFO L168 Benchmark]: RCFGBuilder took 628.24 ms. Allocated memory is still 203.9 MB. Free memory was 177.3 MB in the beginning and 144.5 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:37:17,613 INFO L168 Benchmark]: TraceAbstraction took 6184.25 ms. Allocated memory was 203.9 MB in the beginning and 284.7 MB in the end (delta: 80.7 MB). Free memory was 143.9 MB in the beginning and 122.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 101.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:37:17,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 553.43 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 179.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.88 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 177.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 628.24 ms. Allocated memory is still 203.9 MB. Free memory was 177.3 MB in the beginning and 144.5 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6184.25 ms. Allocated memory was 203.9 MB in the beginning and 284.7 MB in the end (delta: 80.7 MB). Free memory was 143.9 MB in the beginning and 122.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 101.8 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: [L96] 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}] [L96] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L96] CALL task(nondet_tree()) VAL [t={-1:0}] [L74] CALL, EXPR min(t) VAL [n={-1:0}] [L35] COND FALSE !(!n) [L38] EXPR n->left VAL [n={-1:0}, n={-1:0}, 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={-1:0}, n={-1:0}, n->left={0:0}] [L38] int a = min(n->left); [L39] EXPR n->right VAL [a=2147483647, n={-1:0}, n={-1:0}, 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={-1:0}, n={-1:0}, 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={-1:0}, n={-1:0}] [L74] RET, EXPR min(t) VAL [min(t)=2147483647, t={-1:0}, t={-1:0}] [L74] int a = min(t); [L75] int b; VAL [a=2147483647, b={2:0}, t={-1:0}, t={-1:0}] [L77] CALL, EXPR size(t) VAL [t={-1:0}] [L69] COND FALSE !(!t) [L70] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L70] CALL, EXPR size(t->left) VAL [t={0:0}] [L69] COND TRUE !t [L69] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L70] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L70] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L70] CALL, EXPR size(t->right) VAL [t={0:0}] [L69] COND TRUE !t [L69] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L70] 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}] [L70] return size(t->left) + size(t->right) + 1; [L77] RET, EXPR size(t) VAL [a=2147483647, b={2:0}, size(t)=1, t={-1:0}, t={-1:0}] [L77] int n = size(t); [L78] CALL assume_abort_if_not(n != 0) VAL [\old(cond)=1] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L78] RET assume_abort_if_not(n != 0) VAL [a=2147483647, b={2:0}, n=1, t={-1:0}, t={-1:0}] [L79] 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}] [L79] 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}] [L80] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L58] COND FALSE !(!t) [L61] 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}] [L61] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L58] COND TRUE !t [L59] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L61] 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] [L61] i = tree_inorder(t->left, a, i) [L62] EXPR i++ [L62] EXPR t->data [L62] a[i++] = t->data [L63] 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}] [L63] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L58] COND TRUE !t [L59] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L63] 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] [L63] i = tree_inorder(t->right, a, i) [L64] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L80] 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}] [L81] 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] [L81] 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, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 428 SDtfs, 603 SDslu, 1487 SDs, 0 SdLazy, 1940 SolverSat, 649 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 218 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 436 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 54010 SizeOfPredicates, 6 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 74/78 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...