/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_1092a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:36:07,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:36:07,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:36:07,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:36:07,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:36:07,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:36:07,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:36:07,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:36:07,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:36:07,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:36:07,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:36:07,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:36:07,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:36:07,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:36:07,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:36:07,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:36:07,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:36:07,781 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 22:36:07,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:36:07,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:36:07,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:36:07,809 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:36:07,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:36:07,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:36:07,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:36:07,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:36:07,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:36:07,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:36:07,811 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:36:07,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:36:07,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:36:07,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:36:07,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:36:07,813 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:36:07,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:36:07,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:36:07,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:36:07,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:36:07,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:36:07,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:36:07,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:36:08,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:36:08,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:36:08,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:36:08,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:36:08,207 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:36:08,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2021-02-23 22:36:08,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8049477f5/5d2c04becc0e438ba660a13c0b0b773e/FLAG1f521d751 [2021-02-23 22:36:08,973 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:36:08,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2021-02-23 22:36:08,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8049477f5/5d2c04becc0e438ba660a13c0b0b773e/FLAG1f521d751 [2021-02-23 22:36:09,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8049477f5/5d2c04becc0e438ba660a13c0b0b773e [2021-02-23 22:36:09,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:36:09,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:36:09,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:36:09,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:36:09,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:36:09,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3671f2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09, skipping insertion in model container [2021-02-23 22:36:09,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:36:09,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:36:09,538 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c[1753,1766] [2021-02-23 22:36:09,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:36:09,551 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:36:09,579 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c[1753,1766] [2021-02-23 22:36:09,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:36:09,597 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:36:09,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09 WrapperNode [2021-02-23 22:36:09,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:36:09,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:36:09,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:36:09,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:36:09,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (1/1) ... [2021-02-23 22:36:09,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:36:09,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:36:09,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:36:09,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:36:09,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (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 [2021-02-23 22:36:09,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:36:09,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:36:09,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:36:09,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2021-02-23 22:36:09,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-23 22:36:09,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:36:09,759 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:36:09,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:36:09,760 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:36:09,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:36:09,761 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2021-02-23 22:36:09,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 22:36:09,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:36:09,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:36:09,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:36:09,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 22:36:09,763 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-23 22:36:09,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:36:09,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:36:09,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:36:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:36:10,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:36:10,382 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 22:36:10,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:36:10 BoogieIcfgContainer [2021-02-23 22:36:10,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:36:10,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:36:10,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:36:10,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:36:10,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:36:09" (1/3) ... [2021-02-23 22:36:10,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e146ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:36:10, skipping insertion in model container [2021-02-23 22:36:10,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:09" (2/3) ... [2021-02-23 22:36:10,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e146ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:36:10, skipping insertion in model container [2021-02-23 22:36:10,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:36:10" (3/3) ... [2021-02-23 22:36:10,393 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092a.c [2021-02-23 22:36:10,400 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:36:10,405 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:36:10,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:36:10,447 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:36:10,448 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:36:10,448 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:36:10,448 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:36:10,448 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:36:10,448 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:36:10,448 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:36:10,448 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:36:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2021-02-23 22:36:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 22:36:10,476 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:10,477 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] [2021-02-23 22:36:10,477 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2098219990, now seen corresponding path program 1 times [2021-02-23 22:36:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:10,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137721045] [2021-02-23 22:36:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:10,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:10,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:10,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:10,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:10,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:10,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:10,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-23 22:36:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:10,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:10,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:10,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:10,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:10,848 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 22:36:10,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137721045] [2021-02-23 22:36:10,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:36:10,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:36:10,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653554507] [2021-02-23 22:36:10,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:36:10,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:36:10,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:36:10,885 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 4 states. [2021-02-23 22:36:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:11,268 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-02-23 22:36:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:36:11,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2021-02-23 22:36:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:11,281 INFO L225 Difference]: With dead ends: 161 [2021-02-23 22:36:11,282 INFO L226 Difference]: Without dead ends: 83 [2021-02-23 22:36:11,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:36:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-23 22:36:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-02-23 22:36:11,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-02-23 22:36:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-02-23 22:36:11,348 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 36 [2021-02-23 22:36:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:11,349 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-02-23 22:36:11,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:36:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-02-23 22:36:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 22:36:11,351 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:11,352 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] [2021-02-23 22:36:11,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:36:11,352 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:11,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1457267459, now seen corresponding path program 1 times [2021-02-23 22:36:11,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:11,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300994168] [2021-02-23 22:36:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:36:11,422 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:36:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:36:11,502 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:36:11,562 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:36:11,563 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:36:11,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:36:11,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:36:11 BoogieIcfgContainer [2021-02-23 22:36:11,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:36:11,655 INFO L168 Benchmark]: Toolchain (without parser) took 2341.36 ms. Allocated memory was 166.7 MB in the beginning and 201.3 MB in the end (delta: 34.6 MB). Free memory was 142.8 MB in the beginning and 164.9 MB in the end (delta: -22.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:11,655 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 166.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:36:11,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.90 ms. Allocated memory is still 166.7 MB. Free memory was 141.7 MB in the beginning and 131.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:11,660 INFO L168 Benchmark]: Boogie Preprocessor took 47.06 ms. Allocated memory is still 166.7 MB. Free memory was 131.2 MB in the beginning and 129.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:11,661 INFO L168 Benchmark]: RCFGBuilder took 737.50 ms. Allocated memory is still 166.7 MB. Free memory was 129.4 MB in the beginning and 141.9 MB in the end (delta: -12.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:11,664 INFO L168 Benchmark]: TraceAbstraction took 1265.49 ms. Allocated memory was 166.7 MB in the beginning and 201.3 MB in the end (delta: 34.6 MB). Free memory was 141.3 MB in the beginning and 164.9 MB in the end (delta: -23.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:11,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 166.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.90 ms. Allocated memory is still 166.7 MB. Free memory was 141.7 MB in the beginning and 131.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.06 ms. Allocated memory is still 166.7 MB. Free memory was 131.2 MB in the beginning and 129.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 737.50 ms. Allocated memory is still 166.7 MB. Free memory was 129.4 MB in the beginning and 141.9 MB in the end (delta: -12.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1265.49 ms. Allocated memory was 166.7 MB in the beginning and 201.3 MB in the end (delta: 34.6 MB). Free memory was 141.3 MB in the beginning and 164.9 MB in the end (delta: -23.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 83]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 82, overapproximation of bitwiseAnd at line 23, overapproximation of someUnaryFLOAToperation at line 78, overapproximation of someBinaryArithmeticFLOAToperation at line 46. Possible FailurePath: [L13] static const float huge_ceil = 1.0e30; VAL [\old(huge_ceil)=1000000000000000000000000000006, huge_ceil=1000000000000000000000000000000] [L78] float x = -0.0f; VAL [huge_ceil=1000000000000000000000000000000] [L79] CALL, EXPR ceil_float(x) VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000] [L16] __int32_t i0, j0; VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000004] [L17] __uint32_t i, ix; VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000004] [L19] ieee_float_shape_type gf_u; VAL [\old(x)=1000000000000000000000000000004, gf_u={3:0}, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000004] [L20] gf_u.value = (x) VAL [\old(x)=1000000000000000000000000000004, gf_u={3:0}, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000004] [L21] EXPR gf_u.word VAL [\old(x)=1000000000000000000000000000004, gf_u={3:0}, gf_u.word=0, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000004] [L21] (i0) = gf_u.word VAL [\old(x)=1000000000000000000000000000004, gf_u={3:0}, gf_u.word=0, huge_ceil=1000000000000000000000000000000, i0=0, x=1000000000000000000000000000004] [L23] ix = (i0 & 0x7fffffff) VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, i0=0, x=1000000000000000000000000000004] [L24] j0 = (ix >> 23) - 0x7f VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=0, j0=384, x=1000000000000000000000000000004] [L25] COND FALSE !(j0 < 23) VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=0, j0=384, x=1000000000000000000000000000004] [L45] COND TRUE !((ix) < 0x7f800000L) VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=0, j0=384, x=1000000000000000000000000000004] [L46] return x + x; VAL [\old(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=0, j0=384, x=1000000000000000000000000000004] [L79] RET, EXPR ceil_float(x) VAL [ceil_float(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, x=1000000000000000000000000000004] [L79] float res = ceil_float(x); VAL [ceil_float(x)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000005, x=1000000000000000000000000000004] [L82] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000005, res == -0.0f && __signbit_float(res) == 1=0, x=1000000000000000000000000000004] [L82] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000005, res == -0.0f && __signbit_float(res) == 1=0, x=1000000000000000000000000000004] [L83] reach_error() VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000005, x=1000000000000000000000000000004] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 94 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 17 SDslu, 70 SDs, 0 SdLazy, 106 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 2800 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...