/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:00:36,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:00:36,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:00:36,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:00:36,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:00:36,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:00:36,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:00:36,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:00:36,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:00:36,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:00:36,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:00:36,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:00:36,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:00:36,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:00:36,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:00:36,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:00:36,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:00:36,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:00:36,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:00:36,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:00:36,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:00:36,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:00:36,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:00:36,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:00:36,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-16 08:00:36,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-16 08:00:36,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-16 08:00:36,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-16 08:00:36,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-16 08:00:36,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-16 08:00:36,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:00:36,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:00:36,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:00:36,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:00:36,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:00:36,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:00:36,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:00:36,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:00:36,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:00:36,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:00:36,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:00:36,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:00:36,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:00:36,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:00:36,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:00:36,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:00:36,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:00:36,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:00:36,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:00:36,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:00:36,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:00:36,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:00:36,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:00:36,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:00:36,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:00:36,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:00:36,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:00:36,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:00:36,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:00:36,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:00:36,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:00:36,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:00:36,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:00:36,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:00:36,887 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:00:36,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:00:37,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:00:37,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:00:37,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:00:37,408 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:00:37,409 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:00:37,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-04-16 08:00:37,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776916dc3/6eee171157334633afb0ebf96130c484/FLAG767507ccc [2021-04-16 08:00:38,145 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:00:38,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-04-16 08:00:38,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776916dc3/6eee171157334633afb0ebf96130c484/FLAG767507ccc [2021-04-16 08:00:38,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776916dc3/6eee171157334633afb0ebf96130c484 [2021-04-16 08:00:38,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:00:38,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:00:38,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:00:38,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:00:38,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:00:38,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4937b34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38, skipping insertion in model container [2021-04-16 08:00:38,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:00:38,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:00:38,309 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-04-16 08:00:38,324 WARN L1507 CHandler]: Possible shadowing of function min [2021-04-16 08:00:38,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:00:38,348 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:00:38,372 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-04-16 08:00:38,399 WARN L1507 CHandler]: Possible shadowing of function min [2021-04-16 08:00:38,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:00:38,433 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:00:38,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38 WrapperNode [2021-04-16 08:00:38,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:00:38,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:00:38,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:00:38,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:00:38,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... [2021-04-16 08:00:38,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:00:38,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:00:38,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:00:38,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:00:38,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:00:38,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:00:38,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:00:38,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:00:38,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:00:38,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:00:38,556 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-04-16 08:00:38,556 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-04-16 08:00:38,556 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-04-16 08:00:38,557 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-04-16 08:00:38,557 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-04-16 08:00:38,557 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-04-16 08:00:38,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:00:38,558 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-04-16 08:00:38,558 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:00:38,559 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:00:38,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:00:38,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:00:38,560 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-04-16 08:00:38,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-04-16 08:00:38,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:00:38,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-04-16 08:00:38,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:00:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:00:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:00:38,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:00:39,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:00:39,064 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 08:00:39,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:00:39 BoogieIcfgContainer [2021-04-16 08:00:39,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:00:39,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:00:39,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:00:39,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:00:39,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:00:38" (1/3) ... [2021-04-16 08:00:39,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e52767c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:00:39, skipping insertion in model container [2021-04-16 08:00:39,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:00:38" (2/3) ... [2021-04-16 08:00:39,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e52767c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:00:39, skipping insertion in model container [2021-04-16 08:00:39,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:00:39" (3/3) ... [2021-04-16 08:00:39,082 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-04-16 08:00:39,088 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:00:39,093 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:00:39,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:00:39,134 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:00:39,134 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:00:39,134 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:00:39,134 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:00:39,134 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:00:39,134 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:00:39,135 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:00:39,135 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:00:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-04-16 08:00:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-04-16 08:00:39,164 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:00:39,165 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:00:39,165 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:00:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:00:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2021-04-16 08:00:39,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:00:39,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984875157] [2021-04-16 08:00:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:00:39,229 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:00:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:00:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-04-16 08:00:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:00:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:00:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,422 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-04-16 08:00:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,426 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,426 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,427 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-04-16 08:00:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-04-16 08:00:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:39,454 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:39,455 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 08:00:39,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984875157] [2021-04-16 08:00:39,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:00:39,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:00:39,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083759389] [2021-04-16 08:00:39,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:00:39,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:00:39,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:00:39,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:00:39,480 INFO L87 Difference]: Start difference. First operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-04-16 08:00:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:00:39,991 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-04-16 08:00:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-16 08:00:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-04-16 08:00:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:00:40,001 INFO L225 Difference]: With dead ends: 168 [2021-04-16 08:00:40,002 INFO L226 Difference]: Without dead ends: 95 [2021-04-16 08:00:40,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-16 08:00:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-04-16 08:00:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2021-04-16 08:00:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-04-16 08:00:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-04-16 08:00:40,057 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2021-04-16 08:00:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:00:40,057 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-04-16 08:00:40,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-04-16 08:00:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-04-16 08:00:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-04-16 08:00:40,064 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:00:40,065 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:00:40,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:00:40,067 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:00:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:00:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2021-04-16 08:00:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:00:40,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081022387] [2021-04-16 08:00:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:00:40,081 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:00:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,195 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:40,200 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:40,204 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:00:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-04-16 08:00:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,281 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:00:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:00:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:40,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-04-16 08:00:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:40,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:00:40,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-04-16 08:00:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-04-16 08:00:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:40,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:40,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 08:00:40,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081022387] [2021-04-16 08:00:40,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:00:40,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-04-16 08:00:40,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805869448] [2021-04-16 08:00:40,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-16 08:00:40,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:00:40,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-16 08:00:40,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-04-16 08:00:40,385 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-04-16 08:00:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:00:41,005 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2021-04-16 08:00:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-16 08:00:41,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-04-16 08:00:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:00:41,013 INFO L225 Difference]: With dead ends: 154 [2021-04-16 08:00:41,013 INFO L226 Difference]: Without dead ends: 97 [2021-04-16 08:00:41,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-04-16 08:00:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-04-16 08:00:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2021-04-16 08:00:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-04-16 08:00:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-04-16 08:00:41,049 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2021-04-16 08:00:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:00:41,050 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-04-16 08:00:41,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-04-16 08:00:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-04-16 08:00:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-16 08:00:41,057 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:00:41,057 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:00:41,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:00:41,058 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:00:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:00:41,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2021-04-16 08:00:41,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:00:41,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311528230] [2021-04-16 08:00:41,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:00:41,062 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:00:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:41,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:41,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:41,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,335 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-16 08:00:41,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:00:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-04-16 08:00:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,453 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 08:00:41,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:00:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,495 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:00:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:41,526 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 08:00:41,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-04-16 08:00:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-04-16 08:00:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,566 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-04-16 08:00:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-04-16 08:00:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-04-16 08:00:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:41,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:41,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-16 08:00:41,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311528230] [2021-04-16 08:00:41,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:00:41,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-04-16 08:00:41,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532540117] [2021-04-16 08:00:41,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-16 08:00:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:00:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-16 08:00:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-04-16 08:00:41,613 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-04-16 08:00:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:00:42,522 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2021-04-16 08:00:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-16 08:00:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-04-16 08:00:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:00:42,524 INFO L225 Difference]: With dead ends: 164 [2021-04-16 08:00:42,524 INFO L226 Difference]: Without dead ends: 96 [2021-04-16 08:00:42,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 558.8ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-04-16 08:00:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-04-16 08:00:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-04-16 08:00:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-04-16 08:00:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2021-04-16 08:00:42,539 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2021-04-16 08:00:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:00:42,539 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2021-04-16 08:00:42,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-04-16 08:00:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2021-04-16 08:00:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-16 08:00:42,540 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:00:42,540 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:00:42,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:00:42,541 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:00:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:00:42,541 INFO L82 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2021-04-16 08:00:42,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:00:42,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787946336] [2021-04-16 08:00:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:00:42,544 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:00:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:00:42,574 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:00:42,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,577 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:00:42,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:00:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-04-16 08:00:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,637 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,637 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 08:00:42,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 08:00:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-04-16 08:00:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:00:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-04-16 08:00:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,674 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:42,683 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:42,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-04-16 08:00:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,707 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-04-16 08:00:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-04-16 08:00:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-04-16 08:00:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-04-16 08:00:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,734 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-04-16 08:00:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:42,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:42,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-04-16 08:00:42,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787946336] [2021-04-16 08:00:42,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:00:42,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-04-16 08:00:42,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252256524] [2021-04-16 08:00:42,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-16 08:00:42,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:00:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-16 08:00:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-04-16 08:00:42,759 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-04-16 08:00:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:00:43,417 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2021-04-16 08:00:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-16 08:00:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2021-04-16 08:00:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:00:43,419 INFO L225 Difference]: With dead ends: 163 [2021-04-16 08:00:43,419 INFO L226 Difference]: Without dead ends: 98 [2021-04-16 08:00:43,420 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-04-16 08:00:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-04-16 08:00:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-04-16 08:00:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 59 states have internal predecessors, (64), 25 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2021-04-16 08:00:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2021-04-16 08:00:43,435 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2021-04-16 08:00:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:00:43,436 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2021-04-16 08:00:43,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-04-16 08:00:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2021-04-16 08:00:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-16 08:00:43,437 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:00:43,437 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:00:43,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:00:43,437 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:00:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:00:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2021-04-16 08:00:43,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:00:43,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487527277] [2021-04-16 08:00:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:00:43,440 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:00:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:43,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:43,494 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,495 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:43,498 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,499 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:00:43,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:00:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,525 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,525 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-04-16 08:00:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:43,570 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,571 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:43,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-04-16 08:00:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:00:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-04-16 08:00:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,612 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-04-16 08:00:43,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:00:43,624 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-04-16 08:00:43,655 INFO L142 QuantifierPusher]: treesize reduction 4, result has 69.2 percent of original size [2021-04-16 08:00:43,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 08:00:43,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-04-16 08:00:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-04-16 08:00:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,678 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,679 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-04-16 08:00:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-04-16 08:00:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,694 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-04-16 08:00:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-04-16 08:00:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,702 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-04-16 08:00:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:00:43,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-04-16 08:00:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:00:43,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:43,749 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:00:43,749 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:00:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-04-16 08:00:43,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487527277] [2021-04-16 08:00:43,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:00:43,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-04-16 08:00:43,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136714741] [2021-04-16 08:00:43,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-16 08:00:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:00:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-16 08:00:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-04-16 08:00:43,764 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-04-16 08:00:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:00:45,006 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2021-04-16 08:00:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-16 08:00:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 79 [2021-04-16 08:00:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:00:45,011 INFO L225 Difference]: With dead ends: 151 [2021-04-16 08:00:45,011 INFO L226 Difference]: Without dead ends: 98 [2021-04-16 08:00:45,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-04-16 08:00:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-04-16 08:00:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-04-16 08:00:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 61 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 13 states have return successors, (33), 23 states have call predecessors, (33), 23 states have call successors, (33) [2021-04-16 08:00:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-04-16 08:00:45,045 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2021-04-16 08:00:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:00:45,045 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-04-16 08:00:45,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-04-16 08:00:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-04-16 08:00:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-04-16 08:00:45,048 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:00:45,048 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:00:45,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-16 08:00:45,049 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:00:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:00:45,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2021-04-16 08:00:45,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:00:45,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866000070] [2021-04-16 08:00:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:00:45,051 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:00:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 08:00:45,084 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 08:00:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 08:00:45,114 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 08:00:45,149 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-04-16 08:00:45,149 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:00:45,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-16 08:00:45,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:00:45 BoogieIcfgContainer [2021-04-16 08:00:45,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:00:45,168 INFO L168 Benchmark]: Toolchain (without parser) took 7000.48 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 143.1 MB in the beginning and 213.3 MB in the end (delta: -70.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 8.0 GB. [2021-04-16 08:00:45,168 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 160.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:00:45,168 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.50 ms. Allocated memory is still 178.3 MB. Free memory was 142.8 MB in the beginning and 159.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:00:45,168 INFO L168 Benchmark]: Boogie Preprocessor took 53.29 ms. Allocated memory is still 178.3 MB. Free memory was 159.1 MB in the beginning and 156.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:00:45,169 INFO L168 Benchmark]: RCFGBuilder took 583.85 ms. Allocated memory is still 178.3 MB. Free memory was 156.6 MB in the beginning and 122.6 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-04-16 08:00:45,169 INFO L168 Benchmark]: TraceAbstraction took 6091.73 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 122.0 MB in the beginning and 213.3 MB in the end (delta: -91.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:00:45,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 160.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.50 ms. Allocated memory is still 178.3 MB. Free memory was 142.8 MB in the beginning and 159.1 MB in the end (delta: -16.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.29 ms. Allocated memory is still 178.3 MB. Free memory was 159.1 MB in the beginning and 156.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 583.85 ms. Allocated memory is still 178.3 MB. Free memory was 156.6 MB in the beginning and 122.6 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6091.73 ms. Allocated memory was 178.3 MB in the beginning and 256.9 MB in the end (delta: 78.6 MB). Free memory was 122.0 MB in the beginning and 213.3 MB in the end (delta: -91.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L105] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L105] RET, EXPR nondet_tree() [L105] CALL task(nondet_tree()) [L83] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->left [L40] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L40] RET, EXPR min(n->left) [L40] int a = min(n->left); [L41] EXPR n->right [L41] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->right) [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) [L78] COND FALSE !(!t) [L79] EXPR t->left [L79] CALL, EXPR size(t->left) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->left) [L79] EXPR t->right [L79] CALL, EXPR size(t->right) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->right) [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L87] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L87] RET assume_abort_if_not(n != 0) [L88] EXPR, FCALL calloc(n, sizeof(int)) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) [L67] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR tree_inorder(t->left, a, i) [L67] COND TRUE !t [L68] return i; [L70] RET, EXPR tree_inorder(t->left, a, i) [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right [L72] CALL, EXPR tree_inorder(t->right, a, i) [L67] COND TRUE !t [L68] return i; [L72] RET, EXPR tree_inorder(t->right, a, i) [L72] i = tree_inorder(t->right, a, i) [L73] return i; [L89] RET tree_inorder(t, x, n) [L90] EXPR x[0] [L90] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 99 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6018.9ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 30.9ms, AutomataDifference: 3997.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 418 SDtfs, 695 SDslu, 1506 SDs, 0 SdLazy, 2233 SolverSat, 683 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2090.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1757.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 129.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...