/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:29:35,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:29:35,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:29:35,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:29:35,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:29:35,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:29:35,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:29:35,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:29:35,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:29:35,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:29:35,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:29:35,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:29:35,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:29:35,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:29:35,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:29:35,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:29:35,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:29:35,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:29:35,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:29:35,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:29:35,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:29:35,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:29:35,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:29:35,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:29:35,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:29:35,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:29:35,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:29:35,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:29:35,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:29:35,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:29:35,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:29:35,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:29:35,121 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:29:35,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:29:35,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:29:35,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:29:35,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:29:35,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:29:35,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:29:35,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:29:35,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:29:35,124 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:29:35,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:29:35,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:29:35,125 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:29:35,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:29:35,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:29:35,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:29:35,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:29:35,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:29:35,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:29:35,127 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:29:35,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:29:35,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:29:35,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:29:35,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:29:35,605 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:29:35,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-23 20:29:35,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554a30637/5d08b03ac6b0436d97f10002b79d2a42/FLAGe142d1acd [2020-10-23 20:29:36,346 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:29:36,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-10-23 20:29:36,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554a30637/5d08b03ac6b0436d97f10002b79d2a42/FLAGe142d1acd [2020-10-23 20:29:36,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554a30637/5d08b03ac6b0436d97f10002b79d2a42 [2020-10-23 20:29:36,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:29:36,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:29:36,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:29:36,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:29:36,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:29:36,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:36" (1/1) ... [2020-10-23 20:29:36,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4489dd21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:36, skipping insertion in model container [2020-10-23 20:29:36,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:29:36" (1/1) ... [2020-10-23 20:29:36,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:29:36,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:29:36,888 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:36,891 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:36,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:29:36,934 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:29:36,957 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:36,958 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-23 20:29:36,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:29:37,020 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:29:37,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37 WrapperNode [2020-10-23 20:29:37,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:29:37,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:29:37,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:29:37,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:29:37,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... [2020-10-23 20:29:37,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... [2020-10-23 20:29:37,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... [2020-10-23 20:29:37,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... [2020-10-23 20:29:37,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... [2020-10-23 20:29:37,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... [2020-10-23 20:29:37,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... [2020-10-23 20:29:37,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:29:37,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:29:37,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:29:37,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:29:37,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:29:37,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:29:37,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:29:37,302 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 20:29:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:29:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 20:29:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-23 20:29:37,304 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-23 20:29:37,304 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-23 20:29:37,304 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-23 20:29:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-23 20:29:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-23 20:29:37,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:29:37,306 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-23 20:29:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:29:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:29:37,307 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:29:37,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:29:37,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 20:29:37,310 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:29:37,310 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 20:29:37,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:29:37,311 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:29:37,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:29:37,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 20:29:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-23 20:29:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:29:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:29:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:29:37,312 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-23 20:29:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:29:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-23 20:29:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:29:37,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:29:37,314 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-23 20:29:37,314 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-23 20:29:37,314 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-23 20:29:37,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-23 20:29:37,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:29:37,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:29:37,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:29:37,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:29:38,199 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:29:38,200 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 20:29:38,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:38 BoogieIcfgContainer [2020-10-23 20:29:38,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:29:38,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:29:38,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:29:38,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:29:38,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:29:36" (1/3) ... [2020-10-23 20:29:38,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce5ef21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:38, skipping insertion in model container [2020-10-23 20:29:38,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:29:37" (2/3) ... [2020-10-23 20:29:38,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce5ef21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:29:38, skipping insertion in model container [2020-10-23 20:29:38,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:29:38" (3/3) ... [2020-10-23 20:29:38,212 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-10-23 20:29:38,224 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:29:38,230 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:29:38,244 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:29:38,269 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:29:38,269 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:29:38,269 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:29:38,270 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:29:38,270 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:29:38,270 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:29:38,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:29:38,270 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:29:38,291 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states. [2020-10-23 20:29:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-23 20:29:38,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:38,308 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] [2020-10-23 20:29:38,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:38,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1227549006, now seen corresponding path program 1 times [2020-10-23 20:29:38,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:38,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226470044] [2020-10-23 20:29:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:38,407 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:38,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:38,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:38,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:29:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:38,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 20:29:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:38,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 20:29:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:38,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 20:29:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:39,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 20:29:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:29:39,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226470044] [2020-10-23 20:29:39,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:39,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 20:29:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201469219] [2020-10-23 20:29:39,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 20:29:39,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 20:29:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:29:39,071 INFO L87 Difference]: Start difference. First operand 192 states. Second operand 11 states. [2020-10-23 20:29:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:40,823 INFO L93 Difference]: Finished difference Result 334 states and 390 transitions. [2020-10-23 20:29:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 20:29:40,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-23 20:29:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:40,841 INFO L225 Difference]: With dead ends: 334 [2020-10-23 20:29:40,841 INFO L226 Difference]: Without dead ends: 194 [2020-10-23 20:29:40,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:29:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-23 20:29:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 181. [2020-10-23 20:29:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-23 20:29:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 204 transitions. [2020-10-23 20:29:40,945 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 204 transitions. Word has length 66 [2020-10-23 20:29:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:40,947 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 204 transitions. [2020-10-23 20:29:40,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 20:29:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 204 transitions. [2020-10-23 20:29:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-23 20:29:40,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:40,975 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] [2020-10-23 20:29:40,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:29:40,976 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1622442284, now seen corresponding path program 1 times [2020-10-23 20:29:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:40,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237577673] [2020-10-23 20:29:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:40,990 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 20:29:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 20:29:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:29:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:29:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 20:29:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 20:29:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-23 20:29:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:29:41,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237577673] [2020-10-23 20:29:41,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:41,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:29:41,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117287323] [2020-10-23 20:29:41,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:29:41,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:29:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:29:41,342 INFO L87 Difference]: Start difference. First operand 181 states and 204 transitions. Second operand 12 states. [2020-10-23 20:29:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:43,024 INFO L93 Difference]: Finished difference Result 323 states and 368 transitions. [2020-10-23 20:29:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:29:43,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-10-23 20:29:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:43,030 INFO L225 Difference]: With dead ends: 323 [2020-10-23 20:29:43,030 INFO L226 Difference]: Without dead ends: 193 [2020-10-23 20:29:43,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:29:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-23 20:29:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2020-10-23 20:29:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-23 20:29:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 207 transitions. [2020-10-23 20:29:43,079 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 207 transitions. Word has length 86 [2020-10-23 20:29:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:43,080 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 207 transitions. [2020-10-23 20:29:43,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:29:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 207 transitions. [2020-10-23 20:29:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-23 20:29:43,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:43,082 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] [2020-10-23 20:29:43,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:29:43,083 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1316397024, now seen corresponding path program 1 times [2020-10-23 20:29:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:43,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830826466] [2020-10-23 20:29:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:43,088 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 20:29:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:29:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 20:29:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 20:29:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:29:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:29:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-23 20:29:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-23 20:29:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-23 20:29:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-23 20:29:43,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830826466] [2020-10-23 20:29:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:43,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:29:43,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267072438] [2020-10-23 20:29:43,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:29:43,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:29:43,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:29:43,502 INFO L87 Difference]: Start difference. First operand 183 states and 207 transitions. Second operand 14 states. [2020-10-23 20:29:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:45,272 INFO L93 Difference]: Finished difference Result 322 states and 367 transitions. [2020-10-23 20:29:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 20:29:45,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-10-23 20:29:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:45,277 INFO L225 Difference]: With dead ends: 322 [2020-10-23 20:29:45,277 INFO L226 Difference]: Without dead ends: 195 [2020-10-23 20:29:45,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:29:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-23 20:29:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 185. [2020-10-23 20:29:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-23 20:29:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 210 transitions. [2020-10-23 20:29:45,324 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 210 transitions. Word has length 107 [2020-10-23 20:29:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:45,325 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 210 transitions. [2020-10-23 20:29:45,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:29:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 210 transitions. [2020-10-23 20:29:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-23 20:29:45,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:45,327 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] [2020-10-23 20:29:45,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:29:45,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1259421689, now seen corresponding path program 1 times [2020-10-23 20:29:45,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:45,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630917422] [2020-10-23 20:29:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:45,334 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 20:29:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 20:29:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 20:29:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 20:29:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:29:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:29:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-23 20:29:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:29:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:29:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-23 20:29:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-23 20:29:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-23 20:29:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-23 20:29:45,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630917422] [2020-10-23 20:29:45,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:45,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 20:29:45,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107020055] [2020-10-23 20:29:45,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 20:29:45,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:45,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 20:29:45,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-23 20:29:45,814 INFO L87 Difference]: Start difference. First operand 185 states and 210 transitions. Second operand 17 states. [2020-10-23 20:29:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:48,101 INFO L93 Difference]: Finished difference Result 305 states and 346 transitions. [2020-10-23 20:29:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 20:29:48,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 130 [2020-10-23 20:29:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:48,108 INFO L225 Difference]: With dead ends: 305 [2020-10-23 20:29:48,108 INFO L226 Difference]: Without dead ends: 195 [2020-10-23 20:29:48,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 20:29:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-23 20:29:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 187. [2020-10-23 20:29:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-23 20:29:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 213 transitions. [2020-10-23 20:29:48,178 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 213 transitions. Word has length 130 [2020-10-23 20:29:48,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:48,179 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 213 transitions. [2020-10-23 20:29:48,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 20:29:48,179 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 213 transitions. [2020-10-23 20:29:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-23 20:29:48,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:48,184 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] [2020-10-23 20:29:48,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:29:48,185 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1639938800, now seen corresponding path program 1 times [2020-10-23 20:29:48,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:48,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791761403] [2020-10-23 20:29:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:48,198 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:48,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:48,347 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:48,438 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:29:48,439 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:29:48,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:29:48,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:29:48 BoogieIcfgContainer [2020-10-23 20:29:48,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:29:48,490 INFO L168 Benchmark]: Toolchain (without parser) took 11819.22 ms. Allocated memory was 154.1 MB in the beginning and 283.1 MB in the end (delta: 129.0 MB). Free memory was 130.4 MB in the beginning and 179.8 MB in the end (delta: -49.4 MB). Peak memory consumption was 80.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:48,491 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:29:48,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.15 ms. Allocated memory is still 154.1 MB. Free memory was 129.8 MB in the beginning and 117.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:48,499 INFO L168 Benchmark]: Boogie Preprocessor took 131.04 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 115.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:48,501 INFO L168 Benchmark]: RCFGBuilder took 1047.12 ms. Allocated memory is still 154.1 MB. Free memory was 115.5 MB in the beginning and 108.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:48,501 INFO L168 Benchmark]: TraceAbstraction took 10280.61 ms. Allocated memory was 154.1 MB in the beginning and 283.1 MB in the end (delta: 129.0 MB). Free memory was 108.0 MB in the beginning and 179.8 MB in the end (delta: -71.8 MB). Peak memory consumption was 56.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:48,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 347.15 ms. Allocated memory is still 154.1 MB. Free memory was 129.8 MB in the beginning and 117.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 131.04 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 115.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1047.12 ms. Allocated memory is still 154.1 MB. Free memory was 115.5 MB in the beginning and 108.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10280.61 ms. Allocated memory was 154.1 MB in the beginning and 283.1 MB in the end (delta: 129.0 MB). Free memory was 108.0 MB in the beginning and 179.8 MB in the end (delta: -71.8 MB). Peak memory consumption was 56.6 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: [L98] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L98] RET, EXPR nondet_tree() [L98] CALL task(nondet_tree()) [L76] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->left [L40] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L40] RET, EXPR min(n->left) [L40] int a = min(n->left); [L41] EXPR n->right [L41] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->right) [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; [L76] RET, EXPR min(t) [L76] int a = min(t); [L77] int b; [L79] CALL, EXPR size(t) [L71] COND FALSE !(!t) [L72] EXPR t->left [L72] CALL, EXPR size(t->left) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->left) [L72] EXPR t->right [L72] CALL, EXPR size(t->right) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->right) [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) [L79] int n = size(t); [L80] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L80] RET assume_abort_if_not(n != 0) [L81] EXPR, FCALL calloc(n, sizeof(int)) [L81] int *x = calloc(n, sizeof(int)); [L82] CALL tree_inorder(t, x, n) [L60] COND FALSE !(!t) [L63] EXPR t->left [L63] CALL, EXPR tree_inorder(t->left, a, i) [L60] COND TRUE !t [L61] return i; [L63] RET, EXPR tree_inorder(t->left, a, i) [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right [L65] CALL, EXPR tree_inorder(t->right, a, i) [L60] COND TRUE !t [L61] return i; [L65] RET, EXPR tree_inorder(t->right, a, i) [L65] i = tree_inorder(t->right, a, i) [L66] return i; [L82] RET tree_inorder(t, x, n) [L83] EXPR x[0] [L83] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_rec_incorrect.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 192 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.1s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 678 SDtfs, 1570 SDslu, 2443 SDs, 0 SdLazy, 4247 SolverSat, 657 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred 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, 41 StatesRemovedByMinimization, 4 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...