/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:49,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:49,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:49,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:49,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:49,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:49,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:49,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:49,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:49,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:49,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:49,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:49,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:49,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:49,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:49,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:49,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:49,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:49,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:49,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:49,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:49,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:49,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:49,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:49,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:17:49,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:49,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:49,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:49,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:17:49,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:49,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:49,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:49,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:49,274 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:49,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:49,274 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:49,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:49,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:49,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:49,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:49,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:49,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:49,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:49,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:49,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:49,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:49,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:49,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:49,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:49,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:49,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:49,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:49,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:49,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:49,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:49,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:49,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:49,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:49,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:17:49,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:49,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:49,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:49,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:49,609 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:49,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2020-08-18 16:17:49,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc0f2f462/fca9445d0d334ced9d61d7ca1908a8c3/FLAG6aeff09ab [2020-08-18 16:17:50,154 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:50,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test28-2.c [2020-08-18 16:17:50,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc0f2f462/fca9445d0d334ced9d61d7ca1908a8c3/FLAG6aeff09ab [2020-08-18 16:17:50,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc0f2f462/fca9445d0d334ced9d61d7ca1908a8c3 [2020-08-18 16:17:50,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:50,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:50,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:50,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:50,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:50,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61b19e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50, skipping insertion in model container [2020-08-18 16:17:50,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:50,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:50,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:50,802 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:50,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:50,830 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:50,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50 WrapperNode [2020-08-18 16:17:50,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:50,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:50,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:50,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:50,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... [2020-08-18 16:17:50,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:50,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:50,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:50,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:50,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:51,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:51,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:51,021 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:51,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:17:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:17:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:17:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:17:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:51,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:51,241 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:51,242 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 16:17:51,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:51 BoogieIcfgContainer [2020-08-18 16:17:51,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:51,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:51,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:51,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:51,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:50" (1/3) ... [2020-08-18 16:17:51,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80cd8df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:51, skipping insertion in model container [2020-08-18 16:17:51,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:50" (2/3) ... [2020-08-18 16:17:51,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80cd8df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:51, skipping insertion in model container [2020-08-18 16:17:51,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:51" (3/3) ... [2020-08-18 16:17:51,254 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-2.c [2020-08-18 16:17:51,265 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:51,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:51,287 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:51,319 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:51,319 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:51,319 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:51,319 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:51,320 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:51,320 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:51,320 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:51,320 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-18 16:17:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 16:17:51,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:51,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:51,355 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-08-18 16:17:51,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:51,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633829248] [2020-08-18 16:17:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:51,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:51,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633829248] [2020-08-18 16:17:51,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:51,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:17:51,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555822295] [2020-08-18 16:17:51,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:17:51,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:51,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:17:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:17:51,662 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-08-18 16:17:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:51,755 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-18 16:17:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:17:51,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 16:17:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:51,767 INFO L225 Difference]: With dead ends: 34 [2020-08-18 16:17:51,767 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 16:17:51,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:17:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 16:17:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-08-18 16:17:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 16:17:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-18 16:17:51,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-08-18 16:17:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:51,813 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-18 16:17:51,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:17:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-18 16:17:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 16:17:51,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:51,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:51,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:51,815 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-08-18 16:17:51,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:51,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550583399] [2020-08-18 16:17:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:51,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:51,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550583399] [2020-08-18 16:17:51,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:51,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:17:51,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106581786] [2020-08-18 16:17:51,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:17:51,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:51,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:17:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:17:51,918 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-08-18 16:17:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:52,031 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-18 16:17:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:17:52,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-18 16:17:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:52,032 INFO L225 Difference]: With dead ends: 23 [2020-08-18 16:17:52,032 INFO L226 Difference]: Without dead ends: 14 [2020-08-18 16:17:52,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:17:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-18 16:17:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-18 16:17:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 16:17:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-08-18 16:17:52,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-08-18 16:17:52,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:52,039 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-08-18 16:17:52,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:17:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-08-18 16:17:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 16:17:52,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:52,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:52,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:52,040 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:52,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-08-18 16:17:52,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:52,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546627148] [2020-08-18 16:17:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:52,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:52,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546627148] [2020-08-18 16:17:52,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:52,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:17:52,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362358853] [2020-08-18 16:17:52,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:17:52,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:52,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:17:52,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:17:52,186 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 8 states. [2020-08-18 16:17:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:52,277 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-08-18 16:17:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:17:52,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-18 16:17:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:52,278 INFO L225 Difference]: With dead ends: 14 [2020-08-18 16:17:52,278 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:17:52,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:17:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:17:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:17:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:17:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:17:52,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-08-18 16:17:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:52,280 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:17:52,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:17:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:17:52,295 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:17:52,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:52,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:17:52,336 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:52,336 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 16:17:52,337 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:52,337 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:52,337 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:17:52,337 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:17:52,337 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:52,338 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2020-08-18 16:17:52,338 INFO L264 CegarLoopResult]: At program point L21(lines 11 28) the Hoare annotation is: false [2020-08-18 16:17:52,338 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-08-18 16:17:52,338 INFO L268 CegarLoopResult]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2020-08-18 16:17:52,338 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2020-08-18 16:17:52,338 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2020-08-18 16:17:52,339 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 10 28) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-18 16:17:52,339 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-18 16:17:52,339 INFO L268 CegarLoopResult]: For program point L20-2(lines 20 22) no Hoare annotation was computed. [2020-08-18 16:17:52,339 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-08-18 16:17:52,339 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-08-18 16:17:52,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:52 BoogieIcfgContainer [2020-08-18 16:17:52,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:52,358 INFO L168 Benchmark]: Toolchain (without parser) took 1777.37 ms. Allocated memory was 140.0 MB in the beginning and 236.5 MB in the end (delta: 96.5 MB). Free memory was 102.9 MB in the beginning and 202.9 MB in the end (delta: -100.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:52,359 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 16:17:52,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.55 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:52,362 INFO L168 Benchmark]: Boogie Preprocessor took 121.74 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:52,364 INFO L168 Benchmark]: RCFGBuilder took 292.85 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 166.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:52,366 INFO L168 Benchmark]: TraceAbstraction took 1105.66 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 166.3 MB in the beginning and 202.9 MB in the end (delta: -36.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:52,375 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.55 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.74 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 292.85 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 166.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1105.66 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 166.3 MB in the beginning and 202.9 MB in the end (delta: -36.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 30 SDslu, 69 SDs, 0 SdLazy, 118 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 16 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...