/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:31:58,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:31:58,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:31:58,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:31:58,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:31:58,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:31:58,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:31:58,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:31:58,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:31:58,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:31:58,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:31:58,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:31:58,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:31:58,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:31:58,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:31:58,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:31:58,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:31:58,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:31:58,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:31:58,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:31:58,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:31:58,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:31:58,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:31:58,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:31:58,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:31:58,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:31:58,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:31:58,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:31:58,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:31:58,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:31:58,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:31:58,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:31:58,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:31:58,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:31:58,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:31:58,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:31:58,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:31:58,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:31:58,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:31:58,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:31:58,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:31:58,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:31:58,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:31:58,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:31:58,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:31:58,331 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:31:58,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:31:58,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:31:58,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:31:58,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:31:58,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:31:58,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:31:58,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:31:58,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:31:58,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:31:58,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:31:58,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:31:58,333 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:31:58,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:31:58,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:31:58,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:31:58,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:31:58,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:31:58,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:31:58,335 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:31:58,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:31:58,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:31:58,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:31:58,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:31:58,830 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:31:58,831 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-04 16:31:58,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f515413a/a4449f10598b4c86885acc4f7e881c2c/FLAG3b2882da4 [2020-09-04 16:31:59,517 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:31:59,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-04 16:31:59,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f515413a/a4449f10598b4c86885acc4f7e881c2c/FLAG3b2882da4 [2020-09-04 16:31:59,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f515413a/a4449f10598b4c86885acc4f7e881c2c [2020-09-04 16:31:59,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:31:59,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:31:59,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:31:59,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:31:59,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:31:59,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:31:59" (1/1) ... [2020-09-04 16:31:59,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1592531a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:59, skipping insertion in model container [2020-09-04 16:31:59,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:31:59" (1/1) ... [2020-09-04 16:31:59,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:31:59,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:32:00,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:32:00,130 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:32:00,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:32:00,178 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:32:00,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00 WrapperNode [2020-09-04 16:32:00,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:32:00,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:32:00,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:32:00,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:32:00,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... [2020-09-04 16:32:00,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... [2020-09-04 16:32:00,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... [2020-09-04 16:32:00,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... [2020-09-04 16:32:00,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... [2020-09-04 16:32:00,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... [2020-09-04 16:32:00,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... [2020-09-04 16:32:00,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:32:00,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:32:00,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:32:00,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:32:00,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:32:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:32:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:32:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 16:32:00,400 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-04 16:32:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-09-04 16:32:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-04 16:32:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-04 16:32:00,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:32:00,401 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:32:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:32:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:32:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 16:32:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:32:00,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 16:32:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-04 16:32:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:32:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:32:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:32:00,403 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-09-04 16:32:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:32:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 16:32:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:32:00,404 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-04 16:32:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:32:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:32:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:32:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:32:00,816 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:32:00,817 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:32:00,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:32:00 BoogieIcfgContainer [2020-09-04 16:32:00,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:32:00,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:32:00,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:32:00,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:32:00,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:31:59" (1/3) ... [2020-09-04 16:32:00,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3cb043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:32:00, skipping insertion in model container [2020-09-04 16:32:00,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:32:00" (2/3) ... [2020-09-04 16:32:00,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3cb043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:32:00, skipping insertion in model container [2020-09-04 16:32:00,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:32:00" (3/3) ... [2020-09-04 16:32:00,833 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-09-04 16:32:00,845 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:32:00,855 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:32:00,874 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:32:00,899 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:32:00,900 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:32:00,900 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:32:00,900 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:32:00,900 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:32:00,900 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:32:00,900 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:32:00,901 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:32:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-09-04 16:32:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 16:32:00,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:32:00,938 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] [2020-09-04 16:32:00,939 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:32:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:32:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times [2020-09-04 16:32:00,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:32:00,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588333687] [2020-09-04 16:32:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:32:01,034 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:32:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:01,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:32:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:01,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:32:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:01,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 16:32:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:32:01,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588333687] [2020-09-04 16:32:01,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:32:01,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 16:32:01,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657134864] [2020-09-04 16:32:01,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 16:32:01,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:32:01,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 16:32:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:32:01,526 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 10 states. [2020-09-04 16:32:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:32:02,535 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2020-09-04 16:32:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 16:32:02,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-09-04 16:32:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:32:02,554 INFO L225 Difference]: With dead ends: 134 [2020-09-04 16:32:02,555 INFO L226 Difference]: Without dead ends: 74 [2020-09-04 16:32:02,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:32:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-04 16:32:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-09-04 16:32:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 16:32:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-09-04 16:32:02,634 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 33 [2020-09-04 16:32:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:32:02,635 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-09-04 16:32:02,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 16:32:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-09-04 16:32:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 16:32:02,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:32:02,640 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] [2020-09-04 16:32:02,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:32:02,640 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:32:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:32:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1181568947, now seen corresponding path program 1 times [2020-09-04 16:32:02,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:32:02,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844507939] [2020-09-04 16:32:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:32:02,645 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:32:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:02,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:32:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:02,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:32:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:02,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:32:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:02,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 16:32:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:02,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 16:32:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:32:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 16:32:02,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844507939] [2020-09-04 16:32:02,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:32:02,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 16:32:02,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405146840] [2020-09-04 16:32:02,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 16:32:02,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:32:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 16:32:02,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:32:02,998 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 12 states. [2020-09-04 16:32:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:32:03,669 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-09-04 16:32:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 16:32:03,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-09-04 16:32:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:32:03,676 INFO L225 Difference]: With dead ends: 99 [2020-09-04 16:32:03,676 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 16:32:03,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-04 16:32:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 16:32:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-04 16:32:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-04 16:32:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-09-04 16:32:03,719 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 54 [2020-09-04 16:32:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:32:03,720 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-09-04 16:32:03,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 16:32:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-09-04 16:32:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-04 16:32:03,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:32:03,731 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] [2020-09-04 16:32:03,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:32:03,731 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:32:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:32:03,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times [2020-09-04 16:32:03,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:32:03,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468740007] [2020-09-04 16:32:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:32:03,740 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:32:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:32:03,814 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:32:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:32:03,871 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:32:03,911 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:32:03,911 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:32:03,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:32:03,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:32:03 BoogieIcfgContainer [2020-09-04 16:32:03,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:32:03,941 INFO L168 Benchmark]: Toolchain (without parser) took 4102.94 ms. Allocated memory was 145.2 MB in the beginning and 247.5 MB in the end (delta: 102.2 MB). Free memory was 102.1 MB in the beginning and 134.3 MB in the end (delta: -32.2 MB). Peak memory consumption was 70.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:32:03,942 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.8 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. [2020-09-04 16:32:03,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.84 ms. Allocated memory is still 145.2 MB. Free memory was 101.8 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:32:03,944 INFO L168 Benchmark]: Boogie Preprocessor took 142.50 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 179.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:32:03,945 INFO L168 Benchmark]: RCFGBuilder took 500.59 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 156.8 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:32:03,946 INFO L168 Benchmark]: TraceAbstraction took 3112.61 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 156.2 MB in the beginning and 134.3 MB in the end (delta: 21.9 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:32:03,950 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.8 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 340.84 ms. Allocated memory is still 145.2 MB. Free memory was 101.8 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.50 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 179.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 500.59 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 156.8 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3112.61 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 156.2 MB in the beginning and 134.3 MB in the end (delta: 21.9 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 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: [L58] CALL, EXPR nondet_tree() [L18] COND FALSE !(__VERIFIER_nondet_bool()) [L21] struct node *n = (struct node *)malloc(sizeof(struct node)); [L22] n->data = __VERIFIER_nondet_int() [L23] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; [L23] RET, EXPR nondet_tree() [L23] n->left = nondet_tree() [L24] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; [L24] RET, EXPR nondet_tree() [L24] n->right = nondet_tree() [L25] return n; [L58] RET, EXPR nondet_tree() [L58] CALL task(nondet_tree()) [L53] CALL, EXPR max(n) [L30] COND FALSE !(!n) [L33] EXPR n->left [L33] CALL, EXPR max(n->left) [L30] COND TRUE !n [L31] return -2147483648; [L33] RET, EXPR max(n->left) [L33] int a = max(n->left); [L34] EXPR n->right [L34] CALL, EXPR max(n->right) [L30] COND TRUE !n [L31] return -2147483648; [L34] RET, EXPR max(n->right) [L34] int b = max(n->right); [L35] COND TRUE a >= b [L35] return a; [L53] RET, EXPR max(n) [L53] int a = max(n); [L54] CALL check(n, a) [L41] COND TRUE \read(*n) [L42] EXPR n->data [L42] CALL __VERIFIER_assert(n->data <= a) [L9] COND TRUE !cond [L9] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 269 SDslu, 374 SDs, 0 SdLazy, 921 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 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...