/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:18:02,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:18:02,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:18:02,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 19:18:02,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 19:18:02,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 19:18:02,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 19:18:02,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 19:18:02,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 19:18:02,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 19:18:02,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 19:18:02,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 19:18:02,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 19:18:02,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 19:18:02,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 19:18:02,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 19:18:02,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 19:18:02,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 19:18:02,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 19:18:02,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 19:18:02,953 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 19:18:02,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 19:18:02,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 19:18:02,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 19:18:02,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 19:18:02,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 19:18:02,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 19:18:02,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 19:18:02,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 19:18:02,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 19:18:02,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 19:18:02,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 19:18:02,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 19:18:02,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 19:18:02,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 19:18:02,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 19:18:02,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 19:18:02,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 19:18:02,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 19:18:02,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:18:02,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:18:02,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:18:02,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:18:02,986 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:18:02,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:18:02,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:18:02,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:18:02,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:18:02,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:18:02,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:18:02,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:18:02,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:18:02,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:18:02,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:18:02,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:18:02,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:18:02,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:18:02,990 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:18:02,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:18:03,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:18:03,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:18:03,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:18:03,167 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:18:03,167 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:18:03,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-20 19:18:03,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88d5aace5/20771f880b254f59b4133dcc80aeb67e/FLAG64b5209af [2022-03-20 19:18:03,596 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:18:03,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2022-03-20 19:18:03,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88d5aace5/20771f880b254f59b4133dcc80aeb67e/FLAG64b5209af [2022-03-20 19:18:03,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88d5aace5/20771f880b254f59b4133dcc80aeb67e [2022-03-20 19:18:03,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:18:03,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:18:03,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:18:03,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:18:03,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:18:03,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a3025f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03, skipping insertion in model container [2022-03-20 19:18:03,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:18:03,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:18:03,781 WARN L230 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] [2022-03-20 19:18:03,794 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-20 19:18:03,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:18:03,826 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:18:03,840 WARN L230 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] [2022-03-20 19:18:03,856 WARN L1550 CHandler]: Possible shadowing of function min [2022-03-20 19:18:03,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:18:03,872 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:18:03,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03 WrapperNode [2022-03-20 19:18:03,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:18:03,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:18:03,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:18:03,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:18:03,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:18:03,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:18:03,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:18:03,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:18:03,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (1/1) ... [2022-03-20 19:18:03,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:18:03,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:18:03,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:18:03,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:18:04,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:18:04,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:18:04,006 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 19:18:04,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:18:04,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:18:04,007 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-03-20 19:18:04,007 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-03-20 19:18:04,007 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-03-20 19:18:04,007 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-03-20 19:18:04,008 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-03-20 19:18:04,008 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2022-03-20 19:18:04,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:18:04,008 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 19:18:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:18:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure task [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:18:04,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:18:04,084 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:18:04,085 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:18:04,319 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:18:04,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:18:04,325 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 19:18:04,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:18:04 BoogieIcfgContainer [2022-03-20 19:18:04,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:18:04,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:18:04,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:18:04,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:18:04,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:18:03" (1/3) ... [2022-03-20 19:18:04,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceb38c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:18:04, skipping insertion in model container [2022-03-20 19:18:04,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:18:03" (2/3) ... [2022-03-20 19:18:04,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceb38c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:18:04, skipping insertion in model container [2022-03-20 19:18:04,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:18:04" (3/3) ... [2022-03-20 19:18:04,334 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2022-03-20 19:18:04,337 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:18:04,338 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:18:04,370 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:18:04,375 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 19:18:04,375 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:18:04,386 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) [2022-03-20 19:18:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 19:18:04,394 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:04,394 INFO L499 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] [2022-03-20 19:18:04,395 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2022-03-20 19:18:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12261894] [2022-03-20 19:18:04,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:18:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 2 times [2022-03-20 19:18:04,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:04,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215394978] [2022-03-20 19:18:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 19:18:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:18:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 19:18:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 19:18:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:18:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 19:18:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:04,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215394978] [2022-03-20 19:18:04,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215394978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:04,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:04,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:04,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:04,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12261894] [2022-03-20 19:18:04,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12261894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:04,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:04,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:18:04,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278890762] [2022-03-20 19:18:04,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:04,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:18:04,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:18:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:18:04,716 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) [2022-03-20 19:18:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:05,041 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-03-20 19:18:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:18:05,043 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 [2022-03-20 19:18:05,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:05,052 INFO L225 Difference]: With dead ends: 168 [2022-03-20 19:18:05,053 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 19:18:05,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:18:05,060 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:05,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 80 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:18:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 19:18:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-03-20 19:18:05,109 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) [2022-03-20 19:18:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-03-20 19:18:05,117 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2022-03-20 19:18:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:05,118 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-03-20 19:18:05,118 INFO L479 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) [2022-03-20 19:18:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-03-20 19:18:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 19:18:05,122 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:05,122 INFO L499 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] [2022-03-20 19:18:05,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:18:05,123 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2022-03-20 19:18:05,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:05,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015187893] [2022-03-20 19:18:05,129 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:18:05,129 INFO L85 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 2 times [2022-03-20 19:18:05,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:05,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506982046] [2022-03-20 19:18:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:05,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 19:18:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:18:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 19:18:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-20 19:18:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:18:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-20 19:18:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:18:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:05,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506982046] [2022-03-20 19:18:05,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506982046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:05,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:05,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:18:05,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:05,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015187893] [2022-03-20 19:18:05,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015187893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:05,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:05,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:18:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058780050] [2022-03-20 19:18:05,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:05,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:18:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:18:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:18:05,419 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) [2022-03-20 19:18:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:05,892 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2022-03-20 19:18:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:18:05,893 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 [2022-03-20 19:18:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:05,899 INFO L225 Difference]: With dead ends: 154 [2022-03-20 19:18:05,899 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 19:18:05,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:18:05,904 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 98 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:05,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:18:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 19:18:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2022-03-20 19:18:05,915 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) [2022-03-20 19:18:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-03-20 19:18:05,916 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2022-03-20 19:18:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:05,916 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-03-20 19:18:05,916 INFO L479 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) [2022-03-20 19:18:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-03-20 19:18:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 19:18:05,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:05,918 INFO L499 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] [2022-03-20 19:18:05,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:18:05,918 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2022-03-20 19:18:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:05,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713493995] [2022-03-20 19:18:05,919 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:18:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 2 times [2022-03-20 19:18:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:05,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971181288] [2022-03-20 19:18:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:05,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 19:18:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:18:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 19:18:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 19:18:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 19:18:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 19:18:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-20 19:18:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-20 19:18:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 19:18:06,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:06,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971181288] [2022-03-20 19:18:06,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971181288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:18:06,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328556367] [2022-03-20 19:18:06,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:18:06,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:18:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:18:06,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:18:06,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 19:18:06,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:18:06,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:18:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 19:18:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:18:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 19:18:06,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:18:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 19:18:06,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328556367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:18:06,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:18:06,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 15 [2022-03-20 19:18:06,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:06,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713493995] [2022-03-20 19:18:06,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713493995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:06,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:06,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:18:06,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305172446] [2022-03-20 19:18:06,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:06,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:18:06,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:18:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:18:06,722 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 19:18:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:07,330 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-03-20 19:18:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:18:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2022-03-20 19:18:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:07,332 INFO L225 Difference]: With dead ends: 164 [2022-03-20 19:18:07,332 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 19:18:07,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-03-20 19:18:07,333 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 175 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:07,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 84 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:18:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 19:18:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-20 19:18:07,343 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) [2022-03-20 19:18:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2022-03-20 19:18:07,344 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2022-03-20 19:18:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:07,344 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2022-03-20 19:18:07,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 7 states have internal predecessors, (32), 6 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 19:18:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2022-03-20 19:18:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 19:18:07,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:07,346 INFO L499 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] [2022-03-20 19:18:07,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 19:18:07,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:18:07,560 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2022-03-20 19:18:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [926019794] [2022-03-20 19:18:07,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:18:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 2 times [2022-03-20 19:18:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:07,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288104678] [2022-03-20 19:18:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 19:18:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 19:18:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:18:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 19:18:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 19:18:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 19:18:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 19:18:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-20 19:18:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-20 19:18:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-20 19:18:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 19:18:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:07,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288104678] [2022-03-20 19:18:07,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288104678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:07,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:07,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:18:07,749 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:07,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [926019794] [2022-03-20 19:18:07,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [926019794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:07,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:07,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:18:07,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421492707] [2022-03-20 19:18:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:07,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:18:07,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:18:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:18:07,752 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) [2022-03-20 19:18:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:08,292 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2022-03-20 19:18:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:18:08,293 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 [2022-03-20 19:18:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:08,298 INFO L225 Difference]: With dead ends: 163 [2022-03-20 19:18:08,298 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 19:18:08,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-20 19:18:08,302 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 133 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:08,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 82 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:18:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 19:18:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2022-03-20 19:18:08,326 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) [2022-03-20 19:18:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-03-20 19:18:08,327 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2022-03-20 19:18:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:08,327 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-03-20 19:18:08,327 INFO L479 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) [2022-03-20 19:18:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-03-20 19:18:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 19:18:08,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:08,328 INFO L499 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] [2022-03-20 19:18:08,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 19:18:08,328 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2022-03-20 19:18:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:08,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1589679193] [2022-03-20 19:18:08,329 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:18:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 2 times [2022-03-20 19:18:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:08,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636404842] [2022-03-20 19:18:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:18:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-03-20 19:18:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-03-20 19:18:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:18:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 19:18:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 19:18:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 19:18:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-20 19:18:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-03-20 19:18:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 19:18:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-20 19:18:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-20 19:18:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-20 19:18:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:18:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 19:18:08,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:18:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636404842] [2022-03-20 19:18:08,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636404842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:08,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:08,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:18:08,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:18:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1589679193] [2022-03-20 19:18:08,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1589679193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:18:08,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:18:08,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:18:08,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017187723] [2022-03-20 19:18:08,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:18:08,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:18:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:18:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:18:08,511 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 19:18:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:18:09,002 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2022-03-20 19:18:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:18:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 79 [2022-03-20 19:18:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:18:09,004 INFO L225 Difference]: With dead ends: 151 [2022-03-20 19:18:09,004 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 19:18:09,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:18:09,005 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 162 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:18:09,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 82 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:18:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 19:18:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-03-20 19:18:09,013 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) [2022-03-20 19:18:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-03-20 19:18:09,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2022-03-20 19:18:09,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:18:09,015 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-03-20 19:18:09,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 7 states have call predecessors, (16), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 19:18:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-03-20 19:18:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 19:18:09,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:18:09,016 INFO L499 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] [2022-03-20 19:18:09,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 19:18:09,016 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:18:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:18:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2022-03-20 19:18:09,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:18:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263254042] [2022-03-20 19:18:09,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:18:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 2 times [2022-03-20 19:18:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:18:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849091221] [2022-03-20 19:18:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:18:09,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:18:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:18:09,062 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 19:18:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 19:18:09,108 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 19:18:09,108 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 19:18:09,108 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 19:18:09,111 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 19:18:09,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 19:18:09,114 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2] [2022-03-20 19:18:09,116 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 19:18:09,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:18:09 BoogieIcfgContainer [2022-03-20 19:18:09,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 19:18:09,128 INFO L158 Benchmark]: Toolchain (without parser) took 5507.34ms. Allocated memory was 179.3MB in the beginning and 228.6MB in the end (delta: 49.3MB). Free memory was 126.7MB in the beginning and 97.3MB in the end (delta: 29.4MB). Peak memory consumption was 78.8MB. Max. memory is 8.0GB. [2022-03-20 19:18:09,128 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 179.3MB. Free memory was 144.3MB in the beginning and 144.2MB in the end (delta: 70.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 19:18:09,128 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.74ms. Allocated memory was 179.3MB in the beginning and 228.6MB in the end (delta: 49.3MB). Free memory was 126.6MB in the beginning and 202.5MB in the end (delta: -76.0MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2022-03-20 19:18:09,129 INFO L158 Benchmark]: Boogie Preprocessor took 61.76ms. Allocated memory is still 228.6MB. Free memory was 202.5MB in the beginning and 200.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 19:18:09,129 INFO L158 Benchmark]: RCFGBuilder took 390.63ms. Allocated memory is still 228.6MB. Free memory was 200.4MB in the beginning and 181.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2022-03-20 19:18:09,129 INFO L158 Benchmark]: TraceAbstraction took 4800.25ms. Allocated memory is still 228.6MB. Free memory was 180.9MB in the beginning and 97.3MB in the end (delta: 83.6MB). Peak memory consumption was 85.1MB. Max. memory is 8.0GB. [2022-03-20 19:18:09,130 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 179.3MB. Free memory was 144.3MB in the beginning and 144.2MB in the end (delta: 70.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.74ms. Allocated memory was 179.3MB in the beginning and 228.6MB in the end (delta: 49.3MB). Free memory was 126.6MB in the beginning and 202.5MB in the end (delta: -76.0MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 61.76ms. Allocated memory is still 228.6MB. Free memory was 202.5MB in the beginning and 200.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 390.63ms. Allocated memory is still 228.6MB. Free memory was 200.4MB in the beginning and 181.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 4800.25ms. Allocated memory is still 228.6MB. Free memory was 180.9MB in the beginning and 97.3MB in the end (delta: 83.6MB). Peak memory consumption was 85.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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. OverallTime: 4.7s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 790 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 735 mSDsluCounter, 407 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 54 mSDsCounter, 720 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3258 IncrementalHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 720 mSolverCounterUnsat, 353 mSDtfsCounter, 3258 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 286 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s 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! [2022-03-20 19:18:09,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...