/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:39:57,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:39:57,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:39:57,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:39:57,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:39:57,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:39:57,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:39:57,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:39:57,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:39:57,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:39:57,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:39:57,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:39:57,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:39:57,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:39:57,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:39:57,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:39:57,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:39:57,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:39:57,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:39:57,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:39:57,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:39:57,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:39:57,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:39:57,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:39:57,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:39:57,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:39:57,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:39:57,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:39:57,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:39:57,165 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:39:57,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:39:57,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:39:57,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:39:57,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:39:57,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:39:57,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:39:57,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:39:57,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:39:57,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:39:57,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:39:57,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:39:57,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:39:57,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:39:57,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:39:57,175 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:39:57,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:39:57,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:39:57,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:39:57,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:39:57,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:39:57,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:39:57,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:39:57,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:39:57,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:39:57,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:39:57,678 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:39:57,679 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:39:57,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-10-24 02:39:57,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d164481f2/cddffa25af1a42d4a0a24a2abb767ee4/FLAG3e13c142c [2020-10-24 02:39:58,437 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:39:58,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-10-24 02:39:58,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d164481f2/cddffa25af1a42d4a0a24a2abb767ee4/FLAG3e13c142c [2020-10-24 02:39:58,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d164481f2/cddffa25af1a42d4a0a24a2abb767ee4 [2020-10-24 02:39:58,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:39:58,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:39:58,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:39:58,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:39:58,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:39:58,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:39:58" (1/1) ... [2020-10-24 02:39:58,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a6a218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:58, skipping insertion in model container [2020-10-24 02:39:58,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:39:58" (1/1) ... [2020-10-24 02:39:58,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:39:58,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:39:59,082 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-24 02:39:59,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:39:59,141 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:39:59,192 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-24 02:39:59,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:39:59,245 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:39:59,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59 WrapperNode [2020-10-24 02:39:59,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:39:59,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:39:59,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:39:59,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:39:59,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (1/1) ... [2020-10-24 02:39:59,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (1/1) ... [2020-10-24 02:39:59,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (1/1) ... [2020-10-24 02:39:59,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (1/1) ... [2020-10-24 02:39:59,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (1/1) ... [2020-10-24 02:39:59,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (1/1) ... [2020-10-24 02:39:59,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (1/1) ... [2020-10-24 02:39:59,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:39:59,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:39:59,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:39:59,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:39:59,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (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 [2020-10-24 02:39:59,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:39:59,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:39:59,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-10-24 02:39:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:39:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:39:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-24 02:39:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-24 02:39:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-24 02:39:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-24 02:39:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-24 02:39:59,468 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-24 02:39:59,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:39:59,469 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-24 02:39:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-24 02:39:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 02:39:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-24 02:39:59,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:39:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-24 02:39:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-10-24 02:39:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:39:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:39:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:39:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:39:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:39:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-24 02:39:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 02:39:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:39:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 02:39:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-24 02:39:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:39:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 02:39:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-24 02:39:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:39:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-24 02:39:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-24 02:39:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-24 02:39:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-24 02:39:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:39:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:39:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:39:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:40:00,517 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:40:00,517 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:40:00,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:40:00 BoogieIcfgContainer [2020-10-24 02:40:00,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:40:00,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:40:00,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:40:00,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:40:00,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:39:58" (1/3) ... [2020-10-24 02:40:00,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b01749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:40:00, skipping insertion in model container [2020-10-24 02:40:00,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:39:59" (2/3) ... [2020-10-24 02:40:00,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b01749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:40:00, skipping insertion in model container [2020-10-24 02:40:00,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:40:00" (3/3) ... [2020-10-24 02:40:00,531 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-10-24 02:40:00,541 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:40:00,547 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:40:00,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:40:00,579 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:40:00,579 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:40:00,579 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:40:00,579 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:40:00,579 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:40:00,580 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:40:00,580 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:40:00,580 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:40:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-24 02:40:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-24 02:40:00,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:00,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:00,621 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1791888388, now seen corresponding path program 1 times [2020-10-24 02:40:00,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:00,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759602450] [2020-10-24 02:40:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:00,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:01,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-24 02:40:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 02:40:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:01,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-24 02:40:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:01,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-24 02:40:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:01,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-24 02:40:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:01,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-24 02:40:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:01,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759602450] [2020-10-24 02:40:01,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:40:01,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-24 02:40:01,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395488849] [2020-10-24 02:40:01,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:40:01,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:40:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:40:01,260 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 11 states. [2020-10-24 02:40:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:02,679 INFO L93 Difference]: Finished difference Result 376 states and 438 transitions. [2020-10-24 02:40:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:40:02,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-24 02:40:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:02,696 INFO L225 Difference]: With dead ends: 376 [2020-10-24 02:40:02,696 INFO L226 Difference]: Without dead ends: 216 [2020-10-24 02:40:02,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:40:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-24 02:40:02,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 202. [2020-10-24 02:40:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-24 02:40:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 226 transitions. [2020-10-24 02:40:02,788 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 226 transitions. Word has length 66 [2020-10-24 02:40:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:02,789 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 226 transitions. [2020-10-24 02:40:02,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:40:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 226 transitions. [2020-10-24 02:40:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-24 02:40:02,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:02,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:02,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:40:02,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash 753948554, now seen corresponding path program 1 times [2020-10-24 02:40:02,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:02,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135998322] [2020-10-24 02:40:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:02,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:02,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-24 02:40:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:02,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-24 02:40:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:02,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-24 02:40:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:03,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 02:40:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:03,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 02:40:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:03,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-24 02:40:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:03,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-24 02:40:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:03,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-24 02:40:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-24 02:40:03,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135998322] [2020-10-24 02:40:03,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:03,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:40:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011359143] [2020-10-24 02:40:03,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:40:03,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:03,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:40:03,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:40:03,107 INFO L87 Difference]: Start difference. First operand 202 states and 226 transitions. Second operand 12 states. [2020-10-24 02:40:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:04,742 INFO L93 Difference]: Finished difference Result 361 states and 407 transitions. [2020-10-24 02:40:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:40:04,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-10-24 02:40:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:04,748 INFO L225 Difference]: With dead ends: 361 [2020-10-24 02:40:04,748 INFO L226 Difference]: Without dead ends: 215 [2020-10-24 02:40:04,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:40:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-24 02:40:04,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 204. [2020-10-24 02:40:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-24 02:40:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2020-10-24 02:40:04,808 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 86 [2020-10-24 02:40:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:04,809 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2020-10-24 02:40:04,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:40:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2020-10-24 02:40:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-24 02:40:04,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:04,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:04,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:40:04,814 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:04,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1318257437, now seen corresponding path program 1 times [2020-10-24 02:40:04,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:04,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574231595] [2020-10-24 02:40:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:04,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-24 02:40:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-24 02:40:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:40:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 02:40:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-24 02:40:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 02:40:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 02:40:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-24 02:40:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-24 02:40:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-24 02:40:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-24 02:40:05,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574231595] [2020-10-24 02:40:05,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:40:05,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-24 02:40:05,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565213963] [2020-10-24 02:40:05,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:40:05,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:40:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:40:05,288 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand 14 states. [2020-10-24 02:40:06,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:06,889 INFO L93 Difference]: Finished difference Result 360 states and 406 transitions. [2020-10-24 02:40:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:40:06,891 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-10-24 02:40:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:06,896 INFO L225 Difference]: With dead ends: 360 [2020-10-24 02:40:06,896 INFO L226 Difference]: Without dead ends: 217 [2020-10-24 02:40:06,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:40:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-24 02:40:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 206. [2020-10-24 02:40:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-24 02:40:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 232 transitions. [2020-10-24 02:40:06,948 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 232 transitions. Word has length 107 [2020-10-24 02:40:06,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:06,948 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 232 transitions. [2020-10-24 02:40:06,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:40:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 232 transitions. [2020-10-24 02:40:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-24 02:40:06,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:06,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:06,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:40:06,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:06,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:06,954 INFO L82 PathProgramCache]: Analyzing trace with hash 782152357, now seen corresponding path program 1 times [2020-10-24 02:40:06,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:06,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805310191] [2020-10-24 02:40:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-24 02:40:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-24 02:40:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-24 02:40:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-24 02:40:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-24 02:40:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 02:40:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-24 02:40:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-24 02:40:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-24 02:40:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-24 02:40:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-24 02:40:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-24 02:40:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-24 02:40:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805310191] [2020-10-24 02:40:07,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:07,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:40:07,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226249982] [2020-10-24 02:40:07,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:40:07,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:40:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:40:07,529 INFO L87 Difference]: Start difference. First operand 206 states and 232 transitions. Second operand 17 states. [2020-10-24 02:40:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:09,599 INFO L93 Difference]: Finished difference Result 343 states and 385 transitions. [2020-10-24 02:40:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:40:09,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-10-24 02:40:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:09,608 INFO L225 Difference]: With dead ends: 343 [2020-10-24 02:40:09,608 INFO L226 Difference]: Without dead ends: 217 [2020-10-24 02:40:09,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:40:09,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-24 02:40:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 208. [2020-10-24 02:40:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-24 02:40:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 236 transitions. [2020-10-24 02:40:09,684 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 236 transitions. Word has length 133 [2020-10-24 02:40:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:09,685 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 236 transitions. [2020-10-24 02:40:09,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:40:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 236 transitions. [2020-10-24 02:40:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 02:40:09,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:09,689 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:09,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:40:09,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2078905262, now seen corresponding path program 1 times [2020-10-24 02:40:09,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:09,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378762941] [2020-10-24 02:40:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:40:09,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:40:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:40:09,807 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:40:09,905 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:40:09,905 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:40:09,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:40:10,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:40:10 BoogieIcfgContainer [2020-10-24 02:40:10,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:40:10,060 INFO L168 Benchmark]: Toolchain (without parser) took 11329.59 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 126.6 MB in the beginning and 122.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 115.7 MB. Max. memory is 8.0 GB. [2020-10-24 02:40:10,064 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:40:10,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 509.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 114.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:40:10,066 INFO L168 Benchmark]: Boogie Preprocessor took 115.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 111.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:40:10,068 INFO L168 Benchmark]: RCFGBuilder took 1157.29 ms. Allocated memory is still 151.0 MB. Free memory was 111.8 MB in the beginning and 101.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-24 02:40:10,071 INFO L168 Benchmark]: TraceAbstraction took 9530.95 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 101.3 MB in the beginning and 122.4 MB in the end (delta: -21.1 MB). Peak memory consumption was 89.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:40:10,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 509.51 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 114.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 115.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 111.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1157.29 ms. Allocated memory is still 151.0 MB. Free memory was 111.8 MB in the beginning and 101.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9530.95 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 101.3 MB in the beginning and 122.4 MB in the end (delta: -21.1 MB). Peak memory consumption was 89.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L110] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) VAL [__VERIFIER_nondet_bool()=0] [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L29] n->data = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=2147483647, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() VAL [__VERIFIER_nondet_bool()=1] [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() VAL [__VERIFIER_nondet_bool()=1] [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L110] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L110] CALL task(nondet_tree()) VAL [t={-1:0}] [L86] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) VAL [n={-1:0}, n={-1:0}] [L40] EXPR n->data VAL [n={-1:0}, n={-1:0}, n->data=2147483647] [L40] int a = n->data; VAL [a=2147483647, n={-1:0}, n={-1:0}, n->data=2147483647] [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n VAL [n={0:0}, n={0:0}] [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); VAL [a=2147483647, b=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n VAL [n={0:0}, n={0:0}] [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); VAL [a=2147483647, b=2147483647, c=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L43] COND TRUE b <= a && b <= c VAL [a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L86] RET, EXPR min(t) VAL [min(t)=2147483647, t={-1:0}, t={-1:0}] [L86] int a = min(t); VAL [a=2147483647, min(t)=2147483647, t={-1:0}, t={-1:0}] [L87] int b; VAL [a=2147483647, b={3:0}, t={-1:0}, t={-1:0}] [L89] CALL, EXPR size(t) VAL [t={-1:0}] [L81] COND FALSE !(!t) VAL [t={-1:0}, t={-1:0}] [L82] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L82] CALL, EXPR size(t->left) VAL [t={0:0}] [L81] COND TRUE !t VAL [t={0:0}, t={0:0}] [L81] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L82] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L82] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L82] CALL, EXPR size(t->right) VAL [t={0:0}] [L81] COND TRUE !t VAL [t={0:0}, t={0:0}] [L81] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L82] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L82] return size(t->left) + size(t->right) + 1; VAL [\result=1, size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L89] RET, EXPR size(t) VAL [a=2147483647, b={3:0}, size(t)=1, t={-1:0}, t={-1:0}] [L89] int n = size(t); VAL [a=2147483647, b={3:0}, n=1, size(t)=1, t={-1:0}, t={-1:0}] [L90] CALL assume_cycle_if_not(n != 0) VAL [\old(cond)=1] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L90] RET assume_cycle_if_not(n != 0) VAL [a=2147483647, b={3:0}, n=1, t={-1:0}, t={-1:0}] [L91] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}] [L91] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}] [L92] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L70] COND FALSE !(!t) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}] [L73] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L73] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L70] COND TRUE !t VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L71] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L73] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L73] i = tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L74] EXPR i++ VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, i++=1, t={-1:0}, t={-1:0}] [L74] EXPR t->data VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, i++=1, t={-1:0}, t={-1:0}, t->data=2147483647] [L74] a[i++] = t->data VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, i++=1, t={-1:0}, t={-1:0}, t->data=2147483647] [L75] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L75] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L70] COND TRUE !t VAL [\old(i)=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L71] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L75] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L75] i = tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L76] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L92] RET tree_inorder(t, x, n) VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, tree_inorder(t, x, n)=2, x={-2:0}] [L93] EXPR x[0] VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}, x[0]=0] [L93] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L16] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_iter.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 215 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.3s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 741 SDtfs, 1336 SDslu, 2383 SDs, 0 SdLazy, 5192 SolverSat, 451 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=215occurred 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: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 45 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 557 NumberOfCodeBlocks, 557 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 137250 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 70/74 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...