/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:37:17,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:37:17,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:37:17,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:37:17,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:37:17,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:37:17,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:37:17,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:37:17,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:37:17,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:37:17,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:37:17,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:37:17,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:37:17,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:37:17,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:37:17,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:37:17,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 00:37:17,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:37:17,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:37:17,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:37:17,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:37:17,493 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:37:17,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:37:17,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:37:17,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:37:17,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:37:17,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:37:17,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:37:17,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:37:17,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:37:17,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:37:17,512 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:37:17,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:37:17,512 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:37:17,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:37:17,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:37:17,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:37:17,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:37:17,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:37:17,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:37:17,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:37:17,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:37:17,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:37:17,513 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:37:17,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:37:17,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:37:17,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:37:17,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:37:17,949 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:37:17,950 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:37:17,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-05-03 00:37:18,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668c9b442/399c331808734bd1b1f7c6eb4d5637e5/FLAG150bba0a2 [2021-05-03 00:37:18,578 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:37:18,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-05-03 00:37:18,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668c9b442/399c331808734bd1b1f7c6eb4d5637e5/FLAG150bba0a2 [2021-05-03 00:37:18,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668c9b442/399c331808734bd1b1f7c6eb4d5637e5 [2021-05-03 00:37:18,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:37:18,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:37:18,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:37:18,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:37:18,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:37:18,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:37:18" (1/1) ... [2021-05-03 00:37:18,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2abd3ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:18, skipping insertion in model container [2021-05-03 00:37:18,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:37:18" (1/1) ... [2021-05-03 00:37:18,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:37:18,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:37:19,096 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-05-03 00:37:19,116 WARN L1507 CHandler]: Possible shadowing of function min [2021-05-03 00:37:19,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:37:19,155 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:37:19,176 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-05-03 00:37:19,194 WARN L1507 CHandler]: Possible shadowing of function min [2021-05-03 00:37:19,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:37:19,276 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:37:19,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19 WrapperNode [2021-05-03 00:37:19,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:37:19,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:37:19,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:37:19,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:37:19,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (1/1) ... [2021-05-03 00:37:19,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (1/1) ... [2021-05-03 00:37:19,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (1/1) ... [2021-05-03 00:37:19,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (1/1) ... [2021-05-03 00:37:19,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (1/1) ... [2021-05-03 00:37:19,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (1/1) ... [2021-05-03 00:37:19,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (1/1) ... [2021-05-03 00:37:19,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:37:19,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:37:19,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:37:19,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:37:19,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (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 [2021-05-03 00:37:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:37:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:37:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:37:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:37:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:37:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-05-03 00:37:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-05-03 00:37:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-05-03 00:37:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-05-03 00:37:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-05-03 00:37:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-05-03 00:37:19,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:37:19,409 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-05-03 00:37:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-05-03 00:37:19,410 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:37:19,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:37:20,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:37:20,076 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:37:20,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:37:20 BoogieIcfgContainer [2021-05-03 00:37:20,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:37:20,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:37:20,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:37:20,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:37:20,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:37:18" (1/3) ... [2021-05-03 00:37:20,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215fcbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:37:20, skipping insertion in model container [2021-05-03 00:37:20,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:37:19" (2/3) ... [2021-05-03 00:37:20,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@215fcbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:37:20, skipping insertion in model container [2021-05-03 00:37:20,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:37:20" (3/3) ... [2021-05-03 00:37:20,084 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-05-03 00:37:20,091 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:37:20,097 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:37:20,114 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:37:20,148 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:37:20,148 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:37:20,148 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:37:20,148 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:37:20,148 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:37:20,149 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:37:20,149 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:37:20,149 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:37:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-03 00:37:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 00:37:20,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:20,193 INFO L523 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] [2021-05-03 00:37:20,193 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2021-05-03 00:37:20,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:20,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758259928] [2021-05-03 00:37:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:20,283 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-03 00:37:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:37:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:37:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-03 00:37:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-03 00:37:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-03 00:37:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:20,682 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:20,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758259928] [2021-05-03 00:37:20,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [758259928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:20,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:20,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:37:20,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585377197] [2021-05-03 00:37:20,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:37:20,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:20,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:37:20,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:37:20,707 INFO L87 Difference]: Start difference. First operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-03 00:37:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:21,169 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-05-03 00:37:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 00:37:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-03 00:37:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:21,181 INFO L225 Difference]: With dead ends: 168 [2021-05-03 00:37:21,181 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 00:37:21,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 00:37:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 00:37:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2021-05-03 00:37:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-03 00:37:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-05-03 00:37:21,253 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2021-05-03 00:37:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:21,254 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-05-03 00:37:21,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-03 00:37:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-05-03 00:37:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 00:37:21,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:21,258 INFO L523 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] [2021-05-03 00:37:21,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:37:21,259 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2021-05-03 00:37:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:21,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592681919] [2021-05-03 00:37:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:21,264 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-03 00:37:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:37:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:37:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-03 00:37:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-03 00:37:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-03 00:37:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:21,478 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:21,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592681919] [2021-05-03 00:37:21,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [592681919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:21,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:21,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:37:21,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915665462] [2021-05-03 00:37:21,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:37:21,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:37:21,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:37:21,481 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-03 00:37:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:22,271 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2021-05-03 00:37:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:37:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-03 00:37:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:22,285 INFO L225 Difference]: With dead ends: 154 [2021-05-03 00:37:22,285 INFO L226 Difference]: Without dead ends: 97 [2021-05-03 00:37:22,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:37:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-03 00:37:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2021-05-03 00:37:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-05-03 00:37:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-05-03 00:37:22,340 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2021-05-03 00:37:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:22,341 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-05-03 00:37:22,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-03 00:37:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-05-03 00:37:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-03 00:37:22,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:22,351 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:22,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:37:22,352 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2021-05-03 00:37:22,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:22,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696743295] [2021-05-03 00:37:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:22,357 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-03 00:37:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:37:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:37:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-03 00:37:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-03 00:37:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-03 00:37:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-05-03 00:37:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-03 00:37:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 00:37:22,733 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:22,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696743295] [2021-05-03 00:37:22,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [696743295] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:22,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:22,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:37:22,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263586973] [2021-05-03 00:37:22,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:37:22,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:22,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:37:22,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:37:22,738 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-03 00:37:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:23,682 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2021-05-03 00:37:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:37:23,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-03 00:37:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:23,690 INFO L225 Difference]: With dead ends: 164 [2021-05-03 00:37:23,690 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 00:37:23,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:37:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 00:37:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-05-03 00:37:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-05-03 00:37:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2021-05-03 00:37:23,740 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2021-05-03 00:37:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:23,740 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2021-05-03 00:37:23,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-03 00:37:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2021-05-03 00:37:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-03 00:37:23,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:23,745 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:23,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:37:23,745 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2021-05-03 00:37:23,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:23,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120280981] [2021-05-03 00:37:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:23,752 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:23,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-03 00:37:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:23,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-05-03 00:37:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:37:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-03 00:37:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-03 00:37:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-03 00:37:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-03 00:37:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-03 00:37:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-03 00:37:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-03 00:37:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-03 00:37:24,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120280981] [2021-05-03 00:37:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [120280981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:24,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:24,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-03 00:37:24,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683407611] [2021-05-03 00:37:24,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:37:24,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:24,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:37:24,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:37:24,125 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-03 00:37:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:24,901 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2021-05-03 00:37:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:37:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2021-05-03 00:37:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:24,903 INFO L225 Difference]: With dead ends: 163 [2021-05-03 00:37:24,903 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 00:37:24,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:37:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 00:37:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-05-03 00:37:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 59 states have internal predecessors, (64), 25 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2021-05-03 00:37:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2021-05-03 00:37:24,921 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2021-05-03 00:37:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:24,921 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2021-05-03 00:37:24,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-03 00:37:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2021-05-03 00:37:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-03 00:37:24,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:24,923 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:24,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:37:24,923 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2021-05-03 00:37:24,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:24,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896058588] [2021-05-03 00:37:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:24,927 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-03 00:37:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-05-03 00:37:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:37:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-03 00:37:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-03 00:37:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-03 00:37:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-03 00:37:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-03 00:37:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-03 00:37:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-05-03 00:37:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-05-03 00:37:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-03 00:37:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-03 00:37:25,264 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:25,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896058588] [2021-05-03 00:37:25,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [896058588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:25,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:25,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:37:25,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528551637] [2021-05-03 00:37:25,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:37:25,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:37:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:37:25,267 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-03 00:37:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:26,417 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2021-05-03 00:37:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:37:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 79 [2021-05-03 00:37:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:26,420 INFO L225 Difference]: With dead ends: 151 [2021-05-03 00:37:26,420 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 00:37:26,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:37:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 00:37:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-05-03 00:37:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 61 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 13 states have return successors, (33), 23 states have call predecessors, (33), 23 states have call successors, (33) [2021-05-03 00:37:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-05-03 00:37:26,441 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2021-05-03 00:37:26,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:26,441 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-05-03 00:37:26,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-03 00:37:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-05-03 00:37:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-03 00:37:26,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:26,443 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-05-03 00:37:26,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:37:26,444 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2021-05-03 00:37:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:26,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465315551] [2021-05-03 00:37:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:26,447 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-03 00:37:26,477 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-03 00:37:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-03 00:37:26,540 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-03 00:37:26,602 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-03 00:37:26,602 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:37:26,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:37:26,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:37:26 BoogieIcfgContainer [2021-05-03 00:37:26,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:37:26,637 INFO L168 Benchmark]: Toolchain (without parser) took 7694.85 ms. Allocated memory was 180.4 MB in the beginning and 268.4 MB in the end (delta: 88.1 MB). Free memory was 145.9 MB in the beginning and 238.5 MB in the end (delta: -92.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:37:26,637 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 180.4 MB. Free memory is still 163.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:37:26,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.66 ms. Allocated memory is still 180.4 MB. Free memory was 145.7 MB in the beginning and 162.8 MB in the end (delta: -17.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:26,637 INFO L168 Benchmark]: Boogie Preprocessor took 46.19 ms. Allocated memory is still 180.4 MB. Free memory was 162.8 MB in the beginning and 160.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:26,638 INFO L168 Benchmark]: RCFGBuilder took 751.21 ms. Allocated memory is still 180.4 MB. Free memory was 160.3 MB in the beginning and 126.8 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:26,638 INFO L168 Benchmark]: TraceAbstraction took 6557.34 ms. Allocated memory was 180.4 MB in the beginning and 268.4 MB in the end (delta: 88.1 MB). Free memory was 126.4 MB in the beginning and 238.5 MB in the end (delta: -112.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:37:26,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 180.4 MB. Free memory is still 163.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 333.66 ms. Allocated memory is still 180.4 MB. Free memory was 145.7 MB in the beginning and 162.8 MB in the end (delta: -17.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.19 ms. Allocated memory is still 180.4 MB. Free memory was 162.8 MB in the beginning and 160.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 751.21 ms. Allocated memory is still 180.4 MB. Free memory was 160.3 MB in the beginning and 126.8 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6557.34 ms. Allocated memory was 180.4 MB in the beginning and 268.4 MB in the end (delta: 88.1 MB). Free memory was 126.4 MB in the beginning and 238.5 MB in the end (delta: -112.1 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L105] 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; [L105] RET, EXPR nondet_tree() [L105] CALL task(nondet_tree()) [L83] 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; [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) [L78] COND FALSE !(!t) [L79] EXPR t->left [L79] CALL, EXPR size(t->left) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->left) [L79] EXPR t->right [L79] CALL, EXPR size(t->right) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->right) [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L87] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L87] RET assume_abort_if_not(n != 0) [L88] EXPR, FCALL calloc(n, sizeof(int)) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) [L67] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR tree_inorder(t->left, a, i) [L67] COND TRUE !t [L68] return i; [L70] RET, EXPR tree_inorder(t->left, a, i) [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right [L72] CALL, EXPR tree_inorder(t->right, a, i) [L67] COND TRUE !t [L68] return i; [L72] RET, EXPR tree_inorder(t->right, a, i) [L72] i = tree_inorder(t->right, a, i) [L73] return i; [L89] RET tree_inorder(t, x, n) [L90] EXPR x[0] [L90] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 99 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6459.5ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 40.3ms, AutomataDifference: 4195.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 418 SDtfs, 695 SDslu, 1506 SDs, 0 SdLazy, 2233 SolverSat, 683 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2064.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1725.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 185.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 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...