/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/verifythis/tree_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:08:33,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:08:33,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:08:33,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:08:33,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:08:33,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:08:33,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:08:33,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:08:33,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:08:33,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:08:33,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:08:33,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:08:33,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:08:33,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:08:33,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:08:33,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:08:33,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:08:33,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:08:33,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:08:33,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:08:33,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:08:33,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:08:33,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:08:33,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:08:33,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:08:33,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:08:33,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:08:33,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:08:33,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:08:33,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:08:33,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:08:33,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:08:33,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:08:33,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:08:33,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:08:33,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:08:33,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:08:33,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:08:33,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:08:33,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:08:33,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:08:33,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:08:33,571 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:08:33,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:08:33,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:08:33,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:08:33,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:08:33,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:08:33,573 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:08:33,573 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:08:33,573 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:08:33,574 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:08:33,574 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:08:33,574 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:08:33,575 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:08:33,575 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:08:33,575 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:08:33,575 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:08:33,575 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:08:33,575 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:08:33,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:08:33,576 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:08:33,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:08:33,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:08:33,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:08:33,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:08:33,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:08:33,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:08:33,577 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:08:33,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:08:33,577 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:08:33,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:08:33,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:08:33,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:08:33,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:08:33,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:08:33,578 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:08:33,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:08:33,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:08:33,578 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:08:33,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:08:33,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:08:33,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:08:33,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:08:33,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:08:33,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:08:33,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:08:33,857 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:08:33,858 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:08:33,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max_incorrect.c [2023-04-01 06:08:34,999 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:08:35,209 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:08:35,209 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max_incorrect.c [2023-04-01 06:08:35,216 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39628e1a/b97f96748c4347219c09591857beebc5/FLAG71ac948be [2023-04-01 06:08:35,229 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c39628e1a/b97f96748c4347219c09591857beebc5 [2023-04-01 06:08:35,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:08:35,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:08:35,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:08:35,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:08:35,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:08:35,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196a09ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35, skipping insertion in model container [2023-04-01 06:08:35,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:08:35,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:08:35,376 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2023-04-01 06:08:35,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:08:35,412 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:08:35,421 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max_incorrect.c[466,479] [2023-04-01 06:08:35,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:08:35,440 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:08:35,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35 WrapperNode [2023-04-01 06:08:35,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:08:35,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:08:35,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:08:35,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:08:35,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:08:35,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:08:35,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:08:35,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:08:35,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (1/1) ... [2023-04-01 06:08:35,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:08:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:08:35,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:08:35,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:08:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:08:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:08:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:08:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 06:08:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2023-04-01 06:08:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-04-01 06:08:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:08:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2023-04-01 06:08:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:08:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 06:08:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 06:08:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2023-04-01 06:08:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 06:08:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:08:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 06:08:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-04-01 06:08:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 06:08:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:08:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:08:35,545 INFO L130 BoogieDeclarations]: Found specification of procedure task [2023-04-01 06:08:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:08:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:08:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:08:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:08:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:08:35,619 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:08:35,621 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:08:35,782 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:08:35,805 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:08:35,806 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:08:35,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:08:35 BoogieIcfgContainer [2023-04-01 06:08:35,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:08:35,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:08:35,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:08:35,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:08:35,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:08:35" (1/3) ... [2023-04-01 06:08:35,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5a6091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:08:35, skipping insertion in model container [2023-04-01 06:08:35,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:08:35" (2/3) ... [2023-04-01 06:08:35,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5a6091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:08:35, skipping insertion in model container [2023-04-01 06:08:35,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:08:35" (3/3) ... [2023-04-01 06:08:35,830 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2023-04-01 06:08:35,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:08:35,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:08:35,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:08:35,913 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@32813fbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:08:35,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:08:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 06:08:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 06:08:35,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:35,926 INFO L195 NwaCegarLoop]: 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] [2023-04-01 06:08:35,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:35,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 976939484, now seen corresponding path program 1 times [2023-04-01 06:08:35,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:35,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509129305] [2023-04-01 06:08:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:35,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:08:36,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509129305] [2023-04-01 06:08:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509129305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:36,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:36,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:08:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364609606] [2023-04-01 06:08:36,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:36,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:08:36,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:08:36,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:08:36,515 INFO L87 Difference]: Start difference. First operand has 49 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 06:08:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:36,720 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2023-04-01 06:08:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:08:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-01 06:08:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:36,729 INFO L225 Difference]: With dead ends: 88 [2023-04-01 06:08:36,730 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 06:08:36,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 06:08:36,740 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 10 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:36,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 326 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:08:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 06:08:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-01 06:08:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-04-01 06:08:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-04-01 06:08:36,780 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 24 [2023-04-01 06:08:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:36,781 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-04-01 06:08:36,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 06:08:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-04-01 06:08:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 06:08:36,783 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:36,784 INFO L195 NwaCegarLoop]: 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] [2023-04-01 06:08:36,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:08:36,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:36,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash -453082185, now seen corresponding path program 1 times [2023-04-01 06:08:36,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:36,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407035545] [2023-04-01 06:08:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:36,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:08:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 06:08:36,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:08:36,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407035545] [2023-04-01 06:08:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407035545] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:08:36,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:08:36,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:08:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520884949] [2023-04-01 06:08:36,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:08:36,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:08:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:08:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:08:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:08:36,977 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 06:08:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:08:37,078 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-04-01 06:08:37,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:08:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-04-01 06:08:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:08:37,081 INFO L225 Difference]: With dead ends: 58 [2023-04-01 06:08:37,081 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 06:08:37,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:08:37,083 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:08:37,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 252 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:08:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 06:08:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-01 06:08:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.173913043478261) internal successors, (27), 27 states have internal predecessors, (27), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 06:08:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-04-01 06:08:37,092 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 36 [2023-04-01 06:08:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:08:37,093 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-04-01 06:08:37,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 06:08:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-04-01 06:08:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 06:08:37,095 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:08:37,095 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-01 06:08:37,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:08:37,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:08:37,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:08:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1002673452, now seen corresponding path program 1 times [2023-04-01 06:08:37,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:08:37,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698460603] [2023-04-01 06:08:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:08:37,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:08:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 06:08:37,131 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 06:08:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 06:08:37,197 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 06:08:37,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 06:08:37,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 06:08:37,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:08:37,204 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-01 06:08:37,208 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 06:08:37,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 06:08:37 BoogieIcfgContainer [2023-04-01 06:08:37,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 06:08:37,246 INFO L158 Benchmark]: Toolchain (without parser) took 2013.48ms. Allocated memory is still 287.3MB. Free memory was 232.3MB in the beginning and 186.9MB in the end (delta: 45.4MB). Peak memory consumption was 46.7MB. Max. memory is 8.0GB. [2023-04-01 06:08:37,246 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 206.6MB. Free memory is still 157.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 06:08:37,246 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.25ms. Allocated memory is still 287.3MB. Free memory was 232.1MB in the beginning and 221.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 06:08:37,247 INFO L158 Benchmark]: Boogie Preprocessor took 30.31ms. Allocated memory is still 287.3MB. Free memory was 221.6MB in the beginning and 219.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 06:08:37,247 INFO L158 Benchmark]: RCFGBuilder took 336.46ms. Allocated memory is still 287.3MB. Free memory was 219.8MB in the beginning and 204.4MB in the end (delta: 15.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-04-01 06:08:37,248 INFO L158 Benchmark]: TraceAbstraction took 1434.35ms. Allocated memory is still 287.3MB. Free memory was 203.8MB in the beginning and 186.9MB in the end (delta: 16.8MB). Peak memory consumption was 18.4MB. Max. memory is 8.0GB. [2023-04-01 06:08:37,249 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 206.6MB. Free memory is still 157.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.25ms. Allocated memory is still 287.3MB. Free memory was 232.1MB in the beginning and 221.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.31ms. Allocated memory is still 287.3MB. Free memory was 221.6MB in the beginning and 219.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 336.46ms. Allocated memory is still 287.3MB. Free memory was 219.8MB in the beginning and 204.4MB in the end (delta: 15.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1434.35ms. Allocated memory is still 287.3MB. Free memory was 203.8MB in the beginning and 186.9MB in the end (delta: 16.8MB). Peak memory consumption was 18.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L60] CALL, EXPR nondet_tree() [L20] COND FALSE !(__VERIFIER_nondet_bool()) [L23] struct node *n = (struct node *)malloc(sizeof(struct node)); [L24] n->data = __VERIFIER_nondet_int() [L25] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L25] RET, EXPR nondet_tree() VAL [n={-1:0}, nondet_tree()={0:0}] [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; VAL [\result={0:0}] [L26] RET, EXPR nondet_tree() VAL [n={-1:0}, nondet_tree()={0:0}] [L26] n->right = nondet_tree() [L27] return n; VAL [\result={-1:0}, n={-1:0}] [L60] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L60] CALL task(nondet_tree()) VAL [n={-1:0}] [L55] CALL, EXPR max(n) VAL [n={-1:0}] [L32] COND FALSE !(!n) [L35] EXPR n->left VAL [n->left={0:0}, n={-1:0}, n={-1:0}] [L35] CALL, EXPR max(n->left) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L35] RET, EXPR max(n->left) VAL [max(n->left)=-2147483648, n->left={0:0}, n={-1:0}, n={-1:0}] [L35] int a = max(n->left); [L36] EXPR n->right VAL [a=-2147483648, n->right={0:0}, n={-1:0}, n={-1:0}] [L36] CALL, EXPR max(n->right) VAL [n={0:0}] [L32] COND TRUE !n [L33] return -2147483648; VAL [\result=-2147483648, n={0:0}, n={0:0}] [L36] RET, EXPR max(n->right) VAL [a=-2147483648, max(n->right)=-2147483648, n->right={0:0}, n={-1:0}, n={-1:0}] [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; VAL [\result=-2147483648, a=-2147483648, b=-2147483648, n={-1:0}, n={-1:0}] [L55] RET, EXPR max(n) VAL [max(n)=-2147483648, n={-1:0}, n={-1:0}] [L55] int a = max(n); [L56] CALL check(n, a) VAL [\old(a)=-2147483648, n={-1:0}] [L43] COND TRUE \read(*n) [L44] EXPR n->data VAL [\old(a)=-2147483648, a=-2147483648, n->data=-2147483647, n={-1:0}, n={-1:0}] [L44] CALL __VERIFIER_assert(n->data <= a) VAL [\old(cond)=0] [L11] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L11] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 578 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 490 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 191 IncrementalHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 88 mSDtfsCounter, 191 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 145 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 12/12 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! [2023-04-01 06:08:37,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...