/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/float-newlib/float_req_bl_1210.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 04:47:07,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 04:47:07,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 04:47:07,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 04:47:07,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 04:47:07,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 04:47:07,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 04:47:07,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 04:47:07,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 04:47:07,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 04:47:07,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 04:47:07,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 04:47:07,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 04:47:07,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 04:47:07,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 04:47:07,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 04:47:07,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 04:47:07,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 04:47:07,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 04:47:07,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 04:47:07,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 04:47:07,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 04:47:07,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 04:47:07,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 04:47:07,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 04:47:07,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 04:47:07,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 04:47:07,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 04:47:07,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 04:47:07,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 04:47:07,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 04:47:07,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 04:47:07,828 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 04:47:07,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 04:47:07,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 04:47:07,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 04:47:07,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 04:47:07,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 04:47:07,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 04:47:07,831 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 04:47:07,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 04:47:07,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 04:47:07,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 04:47:07,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 04:47:07,832 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 04:47:07,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 04:47:07,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 04:47:07,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:47:07,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 04:47:07,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 04:47:07,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 04:47:07,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 04:47:08,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 04:47:08,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 04:47:08,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 04:47:08,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 04:47:08,246 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 04:47:08,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1210.c [2020-11-07 04:47:08,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09af131f9/d581742c97bf4fa988c43c44ae91f1b2/FLAGe26a4afef [2020-11-07 04:47:08,945 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 04:47:08,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1210.c [2020-11-07 04:47:08,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09af131f9/d581742c97bf4fa988c43c44ae91f1b2/FLAGe26a4afef [2020-11-07 04:47:09,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09af131f9/d581742c97bf4fa988c43c44ae91f1b2 [2020-11-07 04:47:09,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 04:47:09,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 04:47:09,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 04:47:09,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 04:47:09,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 04:47:09,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cd52d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09, skipping insertion in model container [2020-11-07 04:47:09,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 04:47:09,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 04:47:09,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:47:09,593 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 04:47:09,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:47:09,690 INFO L208 MainTranslator]: Completed translation [2020-11-07 04:47:09,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09 WrapperNode [2020-11-07 04:47:09,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 04:47:09,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 04:47:09,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 04:47:09,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 04:47:09,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (1/1) ... [2020-11-07 04:47:09,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 04:47:09,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 04:47:09,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 04:47:09,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 04:47:09,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (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 [2020-11-07 04:47:09,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 04:47:09,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 04:47:09,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 04:47:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-11-07 04:47:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-11-07 04:47:09,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 04:47:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 04:47:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 04:47:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 04:47:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 04:47:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-11-07 04:47:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 04:47:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 04:47:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 04:47:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 04:47:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 04:47:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-11-07 04:47:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 04:47:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 04:47:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 04:47:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 04:47:10,693 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 04:47:10,693 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-07 04:47:10,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:47:10 BoogieIcfgContainer [2020-11-07 04:47:10,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 04:47:10,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 04:47:10,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 04:47:10,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 04:47:10,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:47:09" (1/3) ... [2020-11-07 04:47:10,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9399620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:47:10, skipping insertion in model container [2020-11-07 04:47:10,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:47:09" (2/3) ... [2020-11-07 04:47:10,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9399620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:47:10, skipping insertion in model container [2020-11-07 04:47:10,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:47:10" (3/3) ... [2020-11-07 04:47:10,706 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1210.c [2020-11-07 04:47:10,727 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 04:47:10,732 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 04:47:10,747 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 04:47:10,774 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 04:47:10,774 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 04:47:10,774 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 04:47:10,775 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 04:47:10,775 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 04:47:10,775 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 04:47:10,775 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 04:47:10,775 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 04:47:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-11-07 04:47:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 04:47:10,829 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:47:10,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:47:10,830 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:47:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:47:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2097673152, now seen corresponding path program 1 times [2020-11-07 04:47:10,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:47:10,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780135120] [2020-11-07 04:47:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:47:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:11,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:47:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:11,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 04:47:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:11,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 04:47:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 04:47:11,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780135120] [2020-11-07 04:47:11,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:47:11,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 04:47:11,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802577063] [2020-11-07 04:47:11,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 04:47:11,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:47:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 04:47:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 04:47:11,212 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 4 states. [2020-11-07 04:47:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:47:11,852 INFO L93 Difference]: Finished difference Result 258 states and 297 transitions. [2020-11-07 04:47:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 04:47:11,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-11-07 04:47:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:47:11,866 INFO L225 Difference]: With dead ends: 258 [2020-11-07 04:47:11,866 INFO L226 Difference]: Without dead ends: 126 [2020-11-07 04:47:11,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 04:47:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-07 04:47:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-11-07 04:47:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 04:47:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-11-07 04:47:11,934 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 47 [2020-11-07 04:47:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:47:11,935 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-11-07 04:47:11,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 04:47:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-11-07 04:47:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-07 04:47:11,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:47:11,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:47:11,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 04:47:11,940 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:47:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:47:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1976309040, now seen corresponding path program 1 times [2020-11-07 04:47:11,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:47:11,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255516916] [2020-11-07 04:47:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:47:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:12,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:47:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:12,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 04:47:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-11-07 04:47:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:47:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 04:47:12,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255516916] [2020-11-07 04:47:12,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:47:12,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 04:47:12,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314971955] [2020-11-07 04:47:12,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 04:47:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:47:12,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 04:47:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 04:47:12,199 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 5 states. [2020-11-07 04:47:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:47:12,583 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2020-11-07 04:47:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 04:47:12,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-11-07 04:47:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:47:12,587 INFO L225 Difference]: With dead ends: 134 [2020-11-07 04:47:12,587 INFO L226 Difference]: Without dead ends: 126 [2020-11-07 04:47:12,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 04:47:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-07 04:47:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-11-07 04:47:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 04:47:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2020-11-07 04:47:12,608 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 63 [2020-11-07 04:47:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:47:12,610 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2020-11-07 04:47:12,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 04:47:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2020-11-07 04:47:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-07 04:47:12,613 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:47:12,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:47:12,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 04:47:12,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:47:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:47:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1295981791, now seen corresponding path program 1 times [2020-11-07 04:47:12,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:47:12,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572687184] [2020-11-07 04:47:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:47:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:47:12,670 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:47:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:47:12,708 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:47:12,794 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 04:47:12,795 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 04:47:12,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 04:47:12,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:47:12 BoogieIcfgContainer [2020-11-07 04:47:12,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 04:47:12,895 INFO L168 Benchmark]: Toolchain (without parser) took 3550.71 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.1 MB in the beginning and 157.1 MB in the end (delta: -29.9 MB). Peak memory consumption was 82.1 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:12,896 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 126.3 MB in the end (delta: 77.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 04:47:12,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 115.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:12,898 INFO L168 Benchmark]: Boogie Preprocessor took 112.85 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 113.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:12,899 INFO L168 Benchmark]: RCFGBuilder took 887.66 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 115.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:12,900 INFO L168 Benchmark]: TraceAbstraction took 2194.45 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 114.5 MB in the beginning and 157.1 MB in the end (delta: -42.5 MB). Peak memory consumption was 69.7 MB. Max. memory is 8.0 GB. [2020-11-07 04:47:12,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 126.3 MB in the end (delta: 77.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 341.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 115.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 112.85 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 113.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 887.66 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 115.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2194.45 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 114.5 MB in the beginning and 157.1 MB in the end (delta: -42.5 MB). Peak memory consumption was 69.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 82, overapproximation of bitwiseAnd at line 28. Possible FailurePath: [L13] static const float one_modf = 1.0; VAL [\old(one_modf)=54, one_modf=1] [L82] float x = 0.0f / 0.0f; VAL [one_modf=1] [L83] float iptr; VAL [iptr={8:0}, one_modf=1] [L84] CALL, EXPR modf_float(x, &iptr) VAL [\old(x)=63, iptr={8:0}, one_modf=1] [L16] __int32_t i0, j0; VAL [\old(x)=63, iptr={8:0}, iptr={8:0}, one_modf=1, x=63] [L17] __uint32_t i; VAL [\old(x)=63, iptr={8:0}, iptr={8:0}, one_modf=1, x=63] [L19] ieee_float_shape_type gf_u; VAL [\old(x)=63, gf_u={9:0}, iptr={8:0}, iptr={8:0}, one_modf=1, x=63] [L20] gf_u.value = (x) VAL [\old(x)=63, gf_u={9:0}, iptr={8:0}, iptr={8:0}, one_modf=1, x=63] [L21] EXPR gf_u.word VAL [\old(x)=63, gf_u={9:0}, gf_u.word=0, iptr={8:0}, iptr={8:0}, one_modf=1, x=63] [L21] (i0) = gf_u.word VAL [(i0) = gf_u.word=61, \old(x)=63, gf_u={9:0}, gf_u.word=0, i0=0, iptr={8:0}, iptr={8:0}, one_modf=1, x=63] [L23] j0 = ((i0 >> 23) & 0xff) - 0x7f VAL [\old(x)=63, i0=0, iptr={8:0}, iptr={8:0}, one_modf=1, x=63] [L24] COND TRUE j0 < 23 VAL [\old(x)=63, i0=0, iptr={8:0}, iptr={8:0}, j0=-1, one_modf=1, x=63] [L25] COND TRUE j0 < 0 VAL [\old(x)=63, i0=0, iptr={8:0}, iptr={8:0}, j0=-1, one_modf=1, x=63] [L27] ieee_float_shape_type sf_u; VAL [\old(x)=63, i0=0, iptr={8:0}, iptr={8:0}, j0=-1, one_modf=1, sf_u={3:0}, x=63] [L28] sf_u.word = (i0 & 0x80000000) VAL [\old(x)=63, i0=0, iptr={8:0}, iptr={8:0}, j0=-1, one_modf=1, sf_u={3:0}, x=63] [L29] EXPR sf_u.value VAL [\old(x)=63, i0=0, iptr={8:0}, iptr={8:0}, j0=-1, one_modf=1, sf_u={3:0}, sf_u.value=52, x=63] [L29] (*iptr) = sf_u.value VAL [\old(x)=63, i0=0, iptr={8:0}, iptr={8:0}, j0=-1, one_modf=1, sf_u={3:0}, sf_u.value=52, x=63] [L31] return x; VAL [\old(x)=63, \result=63, i0=0, iptr={8:0}, iptr={8:0}, j0=-1, one_modf=1, x=63] [L84] RET, EXPR modf_float(x, &iptr) VAL [iptr={8:0}, modf_float(x, &iptr)=63, one_modf=1, x=63] [L84] float res = modf_float(x, &iptr); VAL [iptr={8:0}, modf_float(x, &iptr)=63, one_modf=1, res=63, x=63] [L87] EXPR \read(iptr) VAL [\read(iptr)=52, iptr={8:0}, one_modf=1, res=63, x=63] [L87] CALL, EXPR isnan_float(iptr) VAL [\old(x)=52, one_modf=1] [L75] return x != x; VAL [\old(x)=52, \result=1, one_modf=1, x=52] [L87] RET, EXPR isnan_float(iptr) VAL [\read(iptr)=52, iptr={8:0}, isnan_float(iptr)=1, one_modf=1, res=63, x=63] [L87] isnan_float(iptr) && !isnan_float(res) VAL [\read(iptr)=52, iptr={8:0}, isnan_float(iptr)=1, isnan_float(iptr) && !isnan_float(res)=1, one_modf=1, res=63, x=63] [L87] CALL, EXPR isnan_float(res) VAL [\old(x)=63, one_modf=1] [L75] return x != x; VAL [\old(x)=63, \result=0, one_modf=1, x=63] [L87] RET, EXPR isnan_float(res) VAL [\read(iptr)=52, iptr={8:0}, isnan_float(iptr)=1, isnan_float(iptr) && !isnan_float(res)=1, isnan_float(res)=0, one_modf=1, res=63, x=63] [L87] isnan_float(iptr) && !isnan_float(res) VAL [\read(iptr)=52, iptr={8:0}, isnan_float(iptr)=1, isnan_float(iptr) && !isnan_float(res)=1, isnan_float(res)=0, one_modf=1, res=63, x=63] [L87] COND TRUE isnan_float(iptr) && !isnan_float(res) VAL [\read(iptr)=52, iptr={8:0}, isnan_float(iptr)=1, isnan_float(iptr) && !isnan_float(res)=1, isnan_float(res)=0, one_modf=1, res=63, x=63] [L88] CALL reach_error() VAL [one_modf=1] [L3] __assert_fail("0", "float_req_bl_1210.c", 3, "reach_error") VAL [one_modf=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 142 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 265 SDtfs, 42 SDslu, 254 SDs, 0 SdLazy, 357 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 10882 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...