/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:05:14,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:05:14,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:05:14,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:05:14,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:05:14,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:05:14,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:05:14,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:05:14,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:05:14,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:05:14,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:05:14,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:05:14,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:05:14,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:05:14,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:05:14,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:05:14,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:05:14,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:05:14,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:05:14,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:05:14,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:05:14,896 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:05:14,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:05:14,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:05:14,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:05:14,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:05:14,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:05:14,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:05:14,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:05:14,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:05:14,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:05:14,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:05:14,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:05:14,899 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:05:14,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:05:14,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:05:14,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:14,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:05:14,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:05:14,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:05:14,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:05:15,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:05:15,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:05:15,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:05:15,305 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:05:15,306 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:05:15,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test15.c [2021-02-23 23:05:15,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151ae1d32/22cb4320b22f416aadf663508b806398/FLAGc44311375 [2021-02-23 23:05:15,970 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:05:15,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test15.c [2021-02-23 23:05:15,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151ae1d32/22cb4320b22f416aadf663508b806398/FLAGc44311375 [2021-02-23 23:05:16,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/151ae1d32/22cb4320b22f416aadf663508b806398 [2021-02-23 23:05:16,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:05:16,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:05:16,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:16,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:05:16,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:05:16,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71215f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16, skipping insertion in model container [2021-02-23 23:05:16,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:05:16,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:05:16,566 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test15.c[538,551] [2021-02-23 23:05:16,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:16,586 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:05:16,604 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test15.c[538,551] [2021-02-23 23:05:16,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:16,620 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:05:16,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16 WrapperNode [2021-02-23 23:05:16,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:16,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:05:16,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:05:16,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:05:16,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (1/1) ... [2021-02-23 23:05:16,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:05:16,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:05:16,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:05:16,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:05:16,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (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 [2021-02-23 23:05:16,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:05:16,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:05:16,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:05:16,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assign [2021-02-23 23:05:16,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:05:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:05:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:05:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:05:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:05:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:05:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure assign [2021-02-23 23:05:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:05:16,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:05:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:05:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:05:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:05:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:05:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:05:16,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:05:17,000 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 23:05:17,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:17 BoogieIcfgContainer [2021-02-23 23:05:17,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:05:17,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:05:17,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:05:17,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:05:17,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:05:16" (1/3) ... [2021-02-23 23:05:17,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23079fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:17, skipping insertion in model container [2021-02-23 23:05:17,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:16" (2/3) ... [2021-02-23 23:05:17,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23079fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:17, skipping insertion in model container [2021-02-23 23:05:17,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:17" (3/3) ... [2021-02-23 23:05:17,011 INFO L111 eAbstractionObserver]: Analyzing ICFG test15.c [2021-02-23 23:05:17,020 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:05:17,025 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:05:17,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:05:17,079 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:05:17,080 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:05:17,080 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:05:17,080 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:05:17,080 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:05:17,080 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:05:17,081 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:05:17,081 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:05:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2021-02-23 23:05:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 23:05:17,127 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:17,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:17,129 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash -623412260, now seen corresponding path program 1 times [2021-02-23 23:05:17,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:17,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369196541] [2021-02-23 23:05:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:17,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:17,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:05:17,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:05:17,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 23:05:17,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:17,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:05:17,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:17,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:17,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:17,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 23:05:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:17,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:17,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 23:05:17,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 23:05:17,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:17,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 23:05:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:17,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369196541] [2021-02-23 23:05:17,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:17,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 23:05:17,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565955378] [2021-02-23 23:05:17,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 23:05:17,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 23:05:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-02-23 23:05:17,947 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 13 states. [2021-02-23 23:05:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:18,747 INFO L93 Difference]: Finished difference Result 53 states and 52 transitions. [2021-02-23 23:05:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 23:05:18,749 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2021-02-23 23:05:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:18,755 INFO L225 Difference]: With dead ends: 53 [2021-02-23 23:05:18,756 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 23:05:18,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-02-23 23:05:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 23:05:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 23:05:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 23:05:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 23:05:18,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-23 23:05:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:18,783 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 23:05:18,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 23:05:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 23:05:18,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 23:05:18,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:05:18,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 23:05:19,256 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 23:05:19,257 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 23:05:19,257 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 23:05:19,258 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 23:05:19,258 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 23:05:19,258 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:19,258 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 23:05:19,258 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:19,258 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 23:05:19,259 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#t~string6.offset)| |#t~string6.offset|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |old(#t~string4.offset)| |#t~string4.offset|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 23:05:19,259 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 23:05:19,259 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 23:05:19,259 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 23:05:19,259 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 23:05:19,259 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:19,259 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 23:05:19,260 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 23:05:19,260 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 11 23) the Hoare annotation is: true [2021-02-23 23:05:19,260 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: false [2021-02-23 23:05:19,260 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1) (= (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|) (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|))) [2021-02-23 23:05:19,261 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|))) (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1) (= .cse0 (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|)) (= .cse0 |main_#t~mem9|))) [2021-02-23 23:05:19,261 INFO L185 CegarLoopUtils]: At program point L15-1(lines 15 17) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|))) (and (= |main_#t~mem10| |main_#t~mem9|) (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1) (= .cse0 (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|)) (= .cse0 |main_#t~mem9|))) [2021-02-23 23:05:19,261 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= |#memory_int| |old(#memory_int)|) (= (select |#valid| |main_~#a~0.base|) 1)) [2021-02-23 23:05:19,261 INFO L185 CegarLoopUtils]: At program point L15-2(line 15) the Hoare annotation is: false [2021-02-23 23:05:19,261 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 11 23) the Hoare annotation is: true [2021-02-23 23:05:19,262 INFO L185 CegarLoopUtils]: At program point L13-1(line 13) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1)) [2021-02-23 23:05:19,262 INFO L185 CegarLoopUtils]: At program point L15-3(line 15) the Hoare annotation is: false [2021-02-23 23:05:19,262 INFO L185 CegarLoopUtils]: At program point L15-4(line 15) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|))) (and (= |main_#t~mem10| |main_#t~mem9|) (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1) (= .cse0 (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|)) (= .cse0 |main_#t~mem9|))) [2021-02-23 23:05:19,262 INFO L185 CegarLoopUtils]: At program point L15-5(line 15) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|))) (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1) (= .cse0 (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|)) (= .cse0 |main_#t~mem9|))) [2021-02-23 23:05:19,262 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) the Hoare annotation is: false [2021-02-23 23:05:19,263 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 11 23) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2021-02-23 23:05:19,263 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: false [2021-02-23 23:05:19,263 INFO L185 CegarLoopUtils]: At program point L16(lines 11 23) the Hoare annotation is: false [2021-02-23 23:05:19,263 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1)) [2021-02-23 23:05:19,263 INFO L185 CegarLoopUtils]: At program point L14-1(line 14) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1) (= (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|) (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|))) [2021-02-23 23:05:19,264 INFO L185 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= (select |#valid| |main_~#a~0.base|) 1)) [2021-02-23 23:05:19,264 INFO L185 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= |#memory_int| |old(#memory_int)|) (= (select |#valid| |main_~#a~0.base|) 1)) [2021-02-23 23:05:19,264 INFO L185 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select |#valid| |main_~#a~0.base|) 1) (= (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|) (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|))) [2021-02-23 23:05:19,264 INFO L185 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: (and (not (= |main_~#b~0.base| |main_~#a~0.base|)) (= (select (select |#memory_int| |main_~#b~0.base|) |main_~#b~0.offset|) (select (select |#memory_int| |main_~#a~0.base|) |main_~#a~0.offset|))) [2021-02-23 23:05:19,265 INFO L192 CegarLoopUtils]: At program point L12-4(line 12) the Hoare annotation is: true [2021-02-23 23:05:19,265 INFO L192 CegarLoopUtils]: At program point L12-5(line 12) the Hoare annotation is: true [2021-02-23 23:05:19,265 INFO L185 CegarLoopUtils]: At program point L12-6(line 12) the Hoare annotation is: false [2021-02-23 23:05:19,265 INFO L185 CegarLoopUtils]: At program point L12-7(line 12) the Hoare annotation is: false [2021-02-23 23:05:19,265 INFO L185 CegarLoopUtils]: At program point L12-8(line 12) the Hoare annotation is: false [2021-02-23 23:05:19,265 INFO L185 CegarLoopUtils]: At program point L12-9(line 12) the Hoare annotation is: false [2021-02-23 23:05:19,265 INFO L185 CegarLoopUtils]: At program point assignEXIT(lines 7 9) the Hoare annotation is: (and (= assign_~pa.base |assign_#in~pa.base|) (= assign_~pb.base |assign_#in~pb.base|) (or (= |assign_#in~pa.base| |assign_#in~pb.base|) (= (select (select |#memory_int| |assign_#in~pa.base|) |assign_#in~pa.offset|) (select (select |#memory_int| |assign_#in~pb.base|) |assign_#in~pb.offset|))) (= assign_~pa.offset |assign_#in~pa.offset|) (= assign_~pb.offset |assign_#in~pb.offset|)) [2021-02-23 23:05:19,266 INFO L185 CegarLoopUtils]: At program point assignENTRY(lines 7 9) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2021-02-23 23:05:19,266 INFO L185 CegarLoopUtils]: At program point assignFINAL(lines 7 9) the Hoare annotation is: (and (= assign_~pa.base |assign_#in~pa.base|) (= assign_~pb.base |assign_#in~pb.base|) (or (= |assign_#in~pa.base| |assign_#in~pb.base|) (= (select (select |#memory_int| |assign_#in~pa.base|) |assign_#in~pa.offset|) (select (select |#memory_int| |assign_#in~pb.base|) |assign_#in~pb.offset|))) (= assign_~pa.offset |assign_#in~pa.offset|) (= assign_~pb.offset |assign_#in~pb.offset|)) [2021-02-23 23:05:19,266 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (and (= assign_~pa.base |assign_#in~pa.base|) (= assign_~pb.base |assign_#in~pb.base|) (= |#memory_int| |old(#memory_int)|) (= assign_~pa.offset |assign_#in~pa.offset|) (= assign_~pb.offset |assign_#in~pb.offset|)) [2021-02-23 23:05:19,266 INFO L185 CegarLoopUtils]: At program point L7(lines 7 9) the Hoare annotation is: (and (= assign_~pa.base |assign_#in~pa.base|) (= |#memory_int| |old(#memory_int)|) (= assign_~pa.offset |assign_#in~pa.offset|)) [2021-02-23 23:05:19,266 INFO L185 CegarLoopUtils]: At program point L8-1(line 8) the Hoare annotation is: (and (or (= |assign_#in~pa.base| |assign_#in~pb.base|) (= |assign_#t~mem7| (select (select (store |#memory_int| assign_~pa.base (store (select |#memory_int| assign_~pa.base) assign_~pa.offset |assign_#t~mem7|)) |assign_#in~pb.base|) |assign_#in~pb.offset|))) (= assign_~pa.base |assign_#in~pa.base|) (= assign_~pb.base |assign_#in~pb.base|) (= |#memory_int| |old(#memory_int)|) (= assign_~pa.offset |assign_#in~pa.offset|) (= assign_~pb.offset |assign_#in~pb.offset|)) [2021-02-23 23:05:19,267 INFO L185 CegarLoopUtils]: At program point L8-2(line 8) the Hoare annotation is: (let ((.cse0 (= |assign_#in~pa.base| |assign_#in~pb.base|))) (and (or .cse0 (= |assign_#t~mem7| (select (select (store |#memory_int| assign_~pa.base (store (select |#memory_int| assign_~pa.base) assign_~pa.offset |assign_#t~mem7|)) |assign_#in~pb.base|) |assign_#in~pb.offset|))) (= assign_~pa.base |assign_#in~pa.base|) (= assign_~pb.base |assign_#in~pb.base|) (or .cse0 (= (select (select |#memory_int| |assign_#in~pa.base|) |assign_#in~pa.offset|) (select (select |#memory_int| |assign_#in~pb.base|) |assign_#in~pb.offset|))) (= assign_~pa.offset |assign_#in~pa.offset|) (= assign_~pb.offset |assign_#in~pb.offset|))) [2021-02-23 23:05:19,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:05:19 BoogieIcfgContainer [2021-02-23 23:05:19,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:05:19,288 INFO L168 Benchmark]: Toolchain (without parser) took 2948.36 ms. Allocated memory was 151.0 MB in the beginning and 194.0 MB in the end (delta: 43.0 MB). Free memory was 128.1 MB in the beginning and 133.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 106.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:19,289 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:05:19,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.28 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:19,290 INFO L168 Benchmark]: Boogie Preprocessor took 29.87 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:19,291 INFO L168 Benchmark]: RCFGBuilder took 349.79 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 100.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:19,292 INFO L168 Benchmark]: TraceAbstraction took 2282.47 ms. Allocated memory was 151.0 MB in the beginning and 194.0 MB in the end (delta: 43.0 MB). Free memory was 99.9 MB in the beginning and 133.5 MB in the end (delta: -33.6 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:19,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.28 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.87 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 349.79 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 100.3 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2282.47 ms. Allocated memory was 151.0 MB in the beginning and 194.0 MB in the end (delta: 43.0 MB). Free memory was 99.9 MB in the beginning and 133.5 MB in the end (delta: -33.6 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 7]: Procedure Contract for assign Derived contract for procedure assign: (((pa == pa && pb == pb) && (pa == pb || unknown-#memory_int-unknown[pa][pa] == unknown-#memory_int-unknown[pb][pb])) && pa == pa) && pb == pb - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 49 SDslu, 98 SDs, 0 SdLazy, 219 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 49 LocationsWithAnnotation, 49 PreInvPairs, 53 NumberOfFragments, 487 HoareAnnotationTreeSize, 49 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 49 FomulaSimplificationsInter, 256 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 5430 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...