/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:46:17,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:46:17,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:46:17,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:46:17,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:46:17,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:46:17,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:46:17,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:46:17,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:46:17,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:46:17,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:46:17,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:46:17,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:46:17,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:46:17,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:46:17,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:46:17,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:46:17,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:46:17,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:46:17,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:46:17,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:46:17,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:46:17,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:46:17,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:46:17,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:46:17,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:46:17,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:46:17,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:46:17,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:46:17,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:46:17,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:46:17,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:46:17,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:46:17,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:46:17,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:46:17,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:46:17,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:46:17,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:46:17,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:46:17,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:46:17,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:46:17,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 06:46:17,562 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:46:17,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:46:17,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:46:17,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:46:17,565 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:46:17,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:46:17,566 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:46:17,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:46:17,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:46:17,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:46:17,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:46:17,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:46:17,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:46:17,568 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:46:17,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:46:17,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:46:17,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:46:17,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:46:17,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:46:17,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:46:17,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:46:17,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:46:17,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:46:17,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:46:17,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:46:17,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:46:17,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:46:17,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:46:17,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:46:17,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:46:18,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:46:18,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:46:18,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:46:18,115 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:46:18,115 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:46:18,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-27 06:46:18,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4881938dc/d9cfe4729554488197ef8688f1f28d89/FLAG134a609c5 [2020-10-27 06:46:18,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:46:18,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-27 06:46:18,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4881938dc/d9cfe4729554488197ef8688f1f28d89/FLAG134a609c5 [2020-10-27 06:46:19,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4881938dc/d9cfe4729554488197ef8688f1f28d89 [2020-10-27 06:46:19,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:46:19,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:46:19,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:46:19,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:46:19,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:46:19,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4831cf03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19, skipping insertion in model container [2020-10-27 06:46:19,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:46:19,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:46:19,446 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:19,448 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:19,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:46:19,510 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:46:19,555 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:19,560 WARN L1500 CHandler]: Possible shadowing of function min [2020-10-27 06:46:19,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:46:19,626 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:46:19,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19 WrapperNode [2020-10-27 06:46:19,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:46:19,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:46:19,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:46:19,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:46:19,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... [2020-10-27 06:46:19,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:46:19,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:46:19,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:46:19,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:46:19,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:46:19,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:46:19,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:46:19,839 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-10-27 06:46:19,839 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:46:19,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 06:46:19,839 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-27 06:46:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-27 06:46:19,844 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-27 06:46:19,845 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-27 06:46:19,845 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-27 06:46:19,846 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-27 06:46:19,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:46:19,849 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-27 06:46:19,849 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 06:46:19,849 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 06:46:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 06:46:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 06:46:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 06:46:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-10-27 06:46:19,850 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:46:19,851 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:46:19,851 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:46:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:46:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 06:46:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-27 06:46:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 06:46:19,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:46:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 06:46:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-27 06:46:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:46:19,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 06:46:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-27 06:46:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:46:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-27 06:46:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-27 06:46:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-27 06:46:19,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-27 06:46:19,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:46:19,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:46:19,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:46:19,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:46:20,609 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:46:20,609 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 06:46:20,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:46:20 BoogieIcfgContainer [2020-10-27 06:46:20,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:46:20,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:46:20,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:46:20,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:46:20,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:46:19" (1/3) ... [2020-10-27 06:46:20,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43cb6683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:46:20, skipping insertion in model container [2020-10-27 06:46:20,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:19" (2/3) ... [2020-10-27 06:46:20,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43cb6683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:46:20, skipping insertion in model container [2020-10-27 06:46:20,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:46:20" (3/3) ... [2020-10-27 06:46:20,620 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-10-27 06:46:20,633 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:46:20,638 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:46:20,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:46:20,682 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:46:20,682 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:46:20,682 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:46:20,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:46:20,683 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:46:20,683 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:46:20,683 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:46:20,683 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:46:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-10-27 06:46:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 06:46:20,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:20,715 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] [2020-10-27 06:46:20,716 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:20,722 INFO L82 PathProgramCache]: Analyzing trace with hash 608013235, now seen corresponding path program 1 times [2020-10-27 06:46:20,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:20,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031160400] [2020-10-27 06:46:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:21,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 06:46:21,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:21,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-27 06:46:21,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:46:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 06:46:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 06:46:21,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:46:21,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:21,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:21,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:21,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:46:21,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:21,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:21,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:21,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:21,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:21,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:21,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:21,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:21,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 06:46:21,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:21,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:21,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 06:46:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:21,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:21,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 06:46:21,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:21,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:21,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 06:46:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:21,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:21,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 06:46:21,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:46:21,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:21,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:21,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:21,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 06:46:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:21,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:21,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:21,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 06:46:21,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:21,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:21,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 06:46:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:21,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:46:21,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 06:46:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:21,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:21,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:21,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:21,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:46:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:21,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:21,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 06:46:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:22,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:22,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:22,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:22,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:46:22,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:22,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 06:46:22,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:22,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:46:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031160400] [2020-10-27 06:46:22,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:46:22,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 06:46:22,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318162280] [2020-10-27 06:46:22,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 06:46:22,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 06:46:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 06:46:22,042 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 11 states. [2020-10-27 06:46:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:23,038 INFO L93 Difference]: Finished difference Result 176 states and 235 transitions. [2020-10-27 06:46:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 06:46:23,040 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 06:46:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:23,055 INFO L225 Difference]: With dead ends: 176 [2020-10-27 06:46:23,055 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 06:46:23,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-27 06:46:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 06:46:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-10-27 06:46:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 06:46:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-10-27 06:46:23,128 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 45 [2020-10-27 06:46:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:23,128 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-10-27 06:46:23,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 06:46:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-10-27 06:46:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 06:46:23,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:23,133 INFO L422 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, 1] [2020-10-27 06:46:23,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:46:23,133 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:23,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2111601266, now seen corresponding path program 1 times [2020-10-27 06:46:23,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:23,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12571818] [2020-10-27 06:46:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:23,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 06:46:26,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:46:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2860 [2020-10-27 06:46:26,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:46:26,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 06:46:26,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 06:46:26,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:26,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:26,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:46:26,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:26,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:26,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:26,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:46:26,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:46:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 06:46:26,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 06:46:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:26,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:46:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 06:46:26,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 06:46:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:46:26,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 06:46:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 06:46:26,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 06:46:26,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:26,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 06:46:26,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 06:46:26,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 06:46:26,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 06:46:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:26,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 06:46:26,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:26,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:26,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:26,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 06:46:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:26,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 06:46:26,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:26,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 06:46:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:26,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:26,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 06:46:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:26,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 06:46:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:26,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 06:46:26,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:46:26,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:26,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 06:46:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:26,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 06:46:26,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:26,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 06:46:26,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:26,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 06:46:26,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12571818] [2020-10-27 06:46:26,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:46:26,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 06:46:26,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642093420] [2020-10-27 06:46:26,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 06:46:26,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 06:46:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-27 06:46:26,556 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 14 states. [2020-10-27 06:46:27,104 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-27 06:46:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:28,361 INFO L93 Difference]: Finished difference Result 182 states and 238 transitions. [2020-10-27 06:46:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 06:46:28,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-27 06:46:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:28,371 INFO L225 Difference]: With dead ends: 182 [2020-10-27 06:46:28,371 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 06:46:28,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-27 06:46:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 06:46:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-10-27 06:46:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 06:46:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-10-27 06:46:28,395 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 57 [2020-10-27 06:46:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:28,396 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-10-27 06:46:28,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 06:46:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-10-27 06:46:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 06:46:28,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:28,399 INFO L422 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, 1] [2020-10-27 06:46:28,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:46:28,400 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash -330780866, now seen corresponding path program 1 times [2020-10-27 06:46:28,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:28,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411884177] [2020-10-27 06:46:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:28,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:28,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:28,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 06:46:33,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:46:33,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 06:46:33,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:46:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 06:46:33,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 06:46:33,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:33,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:33,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 06:46:33,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:33,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:33,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 06:46:33,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 06:46:33,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:33,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 06:46:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:33,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 06:46:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:33,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:46:33,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:33,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:33,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 06:46:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:33,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:46:33,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:33,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:33,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:46:33,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 06:46:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 06:46:33,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:46:33,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 06:46:33,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 06:46:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:33,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 06:46:33,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:33,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 06:46:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:33,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 06:46:33,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:33,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 06:46:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 06:46:33,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 06:46:33,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 06:46:33,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 06:46:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:33,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 06:46:33,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:33,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:33,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 06:46:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:33,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 06:46:33,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:33,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:46:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:33,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:46:33,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:33,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 06:46:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:33,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:46:33,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:33,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:33,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:33,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:33,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-27 06:46:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:33,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:33,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:33,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:33,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:33,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 06:46:33,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:33,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:33,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 06:46:33,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:33,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-27 06:46:34,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411884177] [2020-10-27 06:46:34,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:46:34,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 06:46:34,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621811206] [2020-10-27 06:46:34,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 06:46:34,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:34,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 06:46:34,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 06:46:34,015 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 13 states. [2020-10-27 06:46:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:35,109 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2020-10-27 06:46:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 06:46:35,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-10-27 06:46:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:35,112 INFO L225 Difference]: With dead ends: 151 [2020-10-27 06:46:35,112 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 06:46:35,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-27 06:46:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 06:46:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-27 06:46:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 06:46:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2020-10-27 06:46:35,133 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 80 [2020-10-27 06:46:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:35,134 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2020-10-27 06:46:35,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 06:46:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2020-10-27 06:46:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 06:46:35,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:35,137 INFO L422 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, 1] [2020-10-27 06:46:35,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:46:35,137 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:35,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1397967645, now seen corresponding path program 1 times [2020-10-27 06:46:35,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:35,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864443030] [2020-10-27 06:46:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 06:46:35,179 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 06:46:35,180 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 06:46:35,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:46:35,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 06:46:35 BoogieIcfgContainer [2020-10-27 06:46:35,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 06:46:35,226 INFO L168 Benchmark]: Toolchain (without parser) took 16017.11 ms. Allocated memory was 154.1 MB in the beginning and 338.7 MB in the end (delta: 184.5 MB). Free memory was 130.1 MB in the beginning and 176.5 MB in the end (delta: -46.4 MB). Peak memory consumption was 139.4 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:35,228 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 154.1 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 06:46:35,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.43 ms. Allocated memory is still 154.1 MB. Free memory was 129.4 MB in the beginning and 117.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:35,232 INFO L168 Benchmark]: Boogie Preprocessor took 114.04 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 115.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:35,238 INFO L168 Benchmark]: RCFGBuilder took 866.10 ms. Allocated memory is still 154.1 MB. Free memory was 115.4 MB in the beginning and 125.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:35,239 INFO L168 Benchmark]: TraceAbstraction took 14610.89 ms. Allocated memory was 154.1 MB in the beginning and 338.7 MB in the end (delta: 184.5 MB). Free memory was 125.1 MB in the beginning and 176.5 MB in the end (delta: -51.3 MB). Peak memory consumption was 132.7 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:35,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 154.1 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 409.43 ms. Allocated memory is still 154.1 MB. Free memory was 129.4 MB in the beginning and 117.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 114.04 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 115.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 866.10 ms. Allocated memory is still 154.1 MB. Free memory was 115.4 MB in the beginning and 125.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14610.89 ms. Allocated memory was 154.1 MB in the beginning and 338.7 MB in the end (delta: 184.5 MB). Free memory was 125.1 MB in the beginning and 176.5 MB in the end (delta: -51.3 MB). Peak memory consumption was 132.7 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: [L102] 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; [L102] RET, EXPR nondet_tree() [L102] CALL task(nondet_tree()) [L78] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left [L41] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->left) [L41] int b = min(n->left); [L42] EXPR n->right [L42] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L42] RET, EXPR min(n->right) [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) [L73] COND FALSE !(!t) [L74] EXPR t->left [L74] CALL, EXPR size(t->left) [L73] COND TRUE !t [L73] return 0; [L74] RET, EXPR size(t->left) [L74] EXPR t->right [L74] CALL, EXPR size(t->right) [L73] COND TRUE !t [L73] return 0; [L74] RET, EXPR size(t->right) [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L82] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L82] RET assume_cycle_if_not(n != 0) [L83] EXPR, FCALL calloc(n, sizeof(int)) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) [L62] COND FALSE !(!t) [L65] EXPR t->left [L65] CALL, EXPR tree_inorder(t->left, a, i) [L62] COND TRUE !t [L63] return i; [L65] RET, EXPR tree_inorder(t->left, a, i) [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right [L67] CALL, EXPR tree_inorder(t->right, a, i) [L62] COND TRUE !t [L63] return i; [L67] RET, EXPR tree_inorder(t->right, a, i) [L67] i = tree_inorder(t->right, a, i) [L68] return i; [L84] RET tree_inorder(t, x, n) [L85] EXPR x[0] [L85] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 101 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.5s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 266 SDtfs, 438 SDslu, 1179 SDs, 0 SdLazy, 1462 SolverSat, 446 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 274 NumberOfCodeBlocks, 274 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 37730 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 43/45 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...