/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:29:38,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:29:38,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:29:38,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:29:38,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:29:38,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:29:38,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:29:38,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:29:38,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:29:38,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:29:38,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:29:38,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:29:38,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:29:39,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:29:39,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:29:39,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:29:39,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:29:39,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:29:39,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:29:39,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:29:39,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:29:39,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:29:39,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:29:39,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:29:39,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:29:39,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:29:39,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:29:39,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:29:39,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:29:39,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:29:39,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:29:39,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:29:39,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:29:39,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:29:39,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:29:39,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:29:39,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:29:39,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:29:39,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:29:39,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:29:39,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:29:39,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:29:39,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:29:39,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:29:39,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:29:39,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:29:39,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:29:39,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:29:39,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:29:39,098 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:29:39,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:29:39,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:29:39,099 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:29:39,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:29:39,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:29:39,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:29:39,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:29:39,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:29:39,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:29:39,100 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:29:39,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:29:39,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:29:39,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:29:39,584 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:29:39,584 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:29:39,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-10-23 20:29:39,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e978540f/a872e28ca4b64cd6a566be8fb9ccb9ea/FLAG6a54a5046 [2020-10-23 20:29:40,424 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:29:40,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-10-23 20:29:40,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e978540f/a872e28ca4b64cd6a566be8fb9ccb9ea/FLAG6a54a5046 [2020-10-23 20:29:40,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e978540f/a872e28ca4b64cd6a566be8fb9ccb9ea [2020-10-23 20:29:40,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:29:40,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:29:40,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:29:40,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:29:40,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:29:40,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:40" (1/1) ... [2020-10-23 20:29:40,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbed540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:40, skipping insertion in model container [2020-10-23 20:29:40,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:40" (1/1) ... [2020-10-23 20:29:40,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:29:40,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:29:41,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:29:41,032 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:29:41,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:29:41,074 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:29:41,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41 WrapperNode [2020-10-23 20:29:41,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:29:41,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:29:41,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:29:41,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:29:41,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (1/1) ... [2020-10-23 20:29:41,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (1/1) ... [2020-10-23 20:29:41,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (1/1) ... [2020-10-23 20:29:41,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (1/1) ... [2020-10-23 20:29:41,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (1/1) ... [2020-10-23 20:29:41,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (1/1) ... [2020-10-23 20:29:41,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (1/1) ... [2020-10-23 20:29:41,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:29:41,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:29:41,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:29:41,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:29:41,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (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 [2020-10-23 20:29:41,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:29:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:29:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:29:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 20:29:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-23 20:29:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-10-23 20:29:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-23 20:29:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-23 20:29:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:29:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:29:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:29:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:29:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 20:29:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:29:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:29:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:29:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:29:41,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 20:29:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-23 20:29:41,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:29:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:29:41,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:29:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-10-23 20:29:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:29:41,205 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 20:29:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:29:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-23 20:29:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:29:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:29:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:29:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:29:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:29:41,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:29:41,918 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:29:41,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:41 BoogieIcfgContainer [2020-10-23 20:29:41,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:29:41,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:29:41,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:29:41,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:29:41,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:29:40" (1/3) ... [2020-10-23 20:29:41,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c22bbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:41, skipping insertion in model container [2020-10-23 20:29:41,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:41" (2/3) ... [2020-10-23 20:29:41,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c22bbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:41, skipping insertion in model container [2020-10-23 20:29:41,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:41" (3/3) ... [2020-10-23 20:29:41,932 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-10-23 20:29:41,945 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:29:41,956 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:29:41,970 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:29:42,006 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:29:42,007 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:29:42,007 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:29:42,007 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:29:42,007 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:29:42,007 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:29:42,007 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:29:42,008 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:29:42,033 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-10-23 20:29:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 20:29:42,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:42,053 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] [2020-10-23 20:29:42,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1346864638, now seen corresponding path program 1 times [2020-10-23 20:29:42,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:42,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391562510] [2020-10-23 20:29:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:42,168 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:42,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:42,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:42,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:29:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:29:42,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391562510] [2020-10-23 20:29:42,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:42,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:29:42,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843704131] [2020-10-23 20:29:42,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:29:42,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:29:42,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:29:42,813 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 10 states. [2020-10-23 20:29:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:44,447 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2020-10-23 20:29:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:29:44,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-23 20:29:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:44,463 INFO L225 Difference]: With dead ends: 144 [2020-10-23 20:29:44,463 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 20:29:44,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:29:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 20:29:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-23 20:29:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 20:29:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-23 20:29:44,536 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 39 [2020-10-23 20:29:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:44,537 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-23 20:29:44,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:29:44,537 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-23 20:29:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 20:29:44,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:44,541 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 20:29:44,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:29:44,542 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash -513693314, now seen corresponding path program 1 times [2020-10-23 20:29:44,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:44,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489117823] [2020-10-23 20:29:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:44,548 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 20:29:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:29:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 20:29:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:29:44,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489117823] [2020-10-23 20:29:44,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:44,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:29:44,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006907351] [2020-10-23 20:29:44,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:29:44,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:29:44,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:29:44,964 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 12 states. [2020-10-23 20:29:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:45,998 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-10-23 20:29:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 20:29:45,999 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-23 20:29:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:46,004 INFO L225 Difference]: With dead ends: 106 [2020-10-23 20:29:46,005 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 20:29:46,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-23 20:29:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 20:29:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-23 20:29:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-23 20:29:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-23 20:29:46,059 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 60 [2020-10-23 20:29:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:46,062 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-23 20:29:46,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:29:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-23 20:29:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 20:29:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:46,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1, 1] [2020-10-23 20:29:46,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:29:46,072 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash -646048036, now seen corresponding path program 1 times [2020-10-23 20:29:46,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:46,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217755471] [2020-10-23 20:29:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:46,085 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:46,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:46,200 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:46,246 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:29:46,246 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:29:46,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:29:46,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:29:46 BoogieIcfgContainer [2020-10-23 20:29:46,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:29:46,275 INFO L168 Benchmark]: Toolchain (without parser) took 5515.52 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.0 MB in the beginning and 67.9 MB in the end (delta: 60.1 MB). Peak memory consumption was 91.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:46,278 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:29:46,280 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.68 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:46,281 INFO L168 Benchmark]: Boogie Preprocessor took 42.92 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:46,282 INFO L168 Benchmark]: RCFGBuilder took 801.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 127.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:46,283 INFO L168 Benchmark]: TraceAbstraction took 4345.28 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 67.9 MB in the end (delta: 59.4 MB). Peak memory consumption was 89.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:46,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.68 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.92 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 801.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 127.3 MB in the end (delta: -11.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4345.28 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 67.9 MB in the end (delta: 59.4 MB). Peak memory consumption was 89.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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; [L25] RET, EXPR nondet_tree() [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; [L26] RET, EXPR nondet_tree() [L26] n->right = nondet_tree() [L27] return n; [L60] RET, EXPR nondet_tree() [L60] CALL task(nondet_tree()) [L55] CALL, EXPR max(n) [L32] COND FALSE !(!n) [L35] EXPR n->left [L35] CALL, EXPR max(n->left) [L32] COND TRUE !n [L33] return -2147483648; [L35] RET, EXPR max(n->left) [L35] int a = max(n->left); [L36] EXPR n->right [L36] CALL, EXPR max(n->right) [L32] COND TRUE !n [L33] return -2147483648; [L36] RET, EXPR max(n->right) [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; [L55] RET, EXPR max(n) [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] EXPR n->data [L44] CALL __VERIFIER_assert(n->data <= a) [L11] COND TRUE !cond [L11] CALL reach_error() [L9] __assert_fail("0", "tree_max_incorrect.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 269 SDslu, 458 SDs, 0 SdLazy, 941 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...