/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:36:56,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:36:56,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:36:56,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:36:56,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:36:56,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:36:56,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:36:56,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:36:56,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:36:56,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:36:56,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:36:56,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:36:56,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:36:56,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:36:56,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:36:56,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:36:56,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:36:56,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:36:56,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:36:56,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:36:56,398 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 17:36:56,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:36:56,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:36:56,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:36:56,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:36:56,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:36:56,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:36:56,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:36:56,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:36:56,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:36:56,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:36:56,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:36:56,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:36:56,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:36:56,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:36:56,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:36:56,428 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:36:56,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:36:56,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:36:56,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:36:56,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:36:56,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:36:56,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:36:56,429 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:36:56,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:36:56,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:36:56,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:36:56,811 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:36:56,812 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:36:56,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2021-02-23 17:36:56,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c474404/c8d4c3284ef94dc38a0d000eabbab7fe/FLAGa8903d14e [2021-02-23 17:36:57,451 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:36:57,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2021-02-23 17:36:57,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c474404/c8d4c3284ef94dc38a0d000eabbab7fe/FLAGa8903d14e [2021-02-23 17:36:57,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2c474404/c8d4c3284ef94dc38a0d000eabbab7fe [2021-02-23 17:36:57,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:36:57,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:36:57,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:36:57,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:36:57,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:36:57,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:36:57" (1/1) ... [2021-02-23 17:36:57,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397df28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:57, skipping insertion in model container [2021-02-23 17:36:57,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:36:57" (1/1) ... [2021-02-23 17:36:57,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:36:57,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:36:58,079 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/double_req_bl_1011b.c[1211,1224] [2021-02-23 17:36:58,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:36:58,092 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:36:58,115 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/double_req_bl_1011b.c[1211,1224] [2021-02-23 17:36:58,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:36:58,133 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:36:58,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58 WrapperNode [2021-02-23 17:36:58,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:36:58,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:36:58,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:36:58,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:36:58,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (1/1) ... [2021-02-23 17:36:58,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (1/1) ... [2021-02-23 17:36:58,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (1/1) ... [2021-02-23 17:36:58,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (1/1) ... [2021-02-23 17:36:58,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (1/1) ... [2021-02-23 17:36:58,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (1/1) ... [2021-02-23 17:36:58,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (1/1) ... [2021-02-23 17:36:58,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:36:58,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:36:58,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:36:58,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:36:58,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (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 17:36:58,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:36:58,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:36:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:36:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2021-02-23 17:36:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_double [2021-02-23 17:36:58,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:36:58,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:36:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:36:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:36:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:36:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2021-02-23 17:36:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 17:36:58,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:36:58,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:36:58,281 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_double [2021-02-23 17:36:58,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:36:58,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 17:36:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:36:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:36:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:36:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:36:58,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:36:58,727 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 17:36:58,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:36:58 BoogieIcfgContainer [2021-02-23 17:36:58,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:36:58,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:36:58,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:36:58,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:36:58,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:36:57" (1/3) ... [2021-02-23 17:36:58,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ef322c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:36:58, skipping insertion in model container [2021-02-23 17:36:58,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:36:58" (2/3) ... [2021-02-23 17:36:58,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ef322c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:36:58, skipping insertion in model container [2021-02-23 17:36:58,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:36:58" (3/3) ... [2021-02-23 17:36:58,738 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1011b.c [2021-02-23 17:36:58,745 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:36:58,751 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:36:58,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:36:58,798 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:36:58,798 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:36:58,799 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:36:58,799 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:36:58,799 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:36:58,799 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:36:58,799 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:36:58,799 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:36:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2021-02-23 17:36:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 17:36:58,827 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:36:58,828 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] [2021-02-23 17:36:58,828 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:36:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:36:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash 240757498, now seen corresponding path program 1 times [2021-02-23 17:36:58,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:36:58,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527745523] [2021-02-23 17:36:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:36:58,924 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:36:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:36:59,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:36:59,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:36:59,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:36:59,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:36:59,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:36:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:36:59,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:36:59,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:36:59,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:36:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:36:59,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:36:59,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:36:59,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:36:59,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:36:59,166 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 17:36:59,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527745523] [2021-02-23 17:36:59,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:36:59,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:36:59,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205227741] [2021-02-23 17:36:59,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:36:59,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:36:59,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:36:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:36:59,203 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states. [2021-02-23 17:36:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:36:59,732 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-02-23 17:36:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:36:59,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-23 17:36:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:36:59,743 INFO L225 Difference]: With dead ends: 121 [2021-02-23 17:36:59,744 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 17:36:59,748 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 17:36:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 17:36:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-02-23 17:36:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-23 17:36:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-02-23 17:36:59,806 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 29 [2021-02-23 17:36:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:36:59,806 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-02-23 17:36:59,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:36:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-02-23 17:36:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 17:36:59,809 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:36:59,809 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] [2021-02-23 17:36:59,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:36:59,809 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:36:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:36:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1317132015, now seen corresponding path program 1 times [2021-02-23 17:36:59,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:36:59,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618329606] [2021-02-23 17:36:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:36:59,815 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:36:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:36:59,870 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:36:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:36:59,921 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:36:59,958 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:36:59,959 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:36:59,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:36:59,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:36:59 BoogieIcfgContainer [2021-02-23 17:36:59,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:36:59,980 INFO L168 Benchmark]: Toolchain (without parser) took 2131.12 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 133.0 MB in the beginning and 166.0 MB in the end (delta: -33.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:36:59,980 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 130.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:36:59,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.50 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 122.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:36:59,982 INFO L168 Benchmark]: Boogie Preprocessor took 41.70 ms. Allocated memory is still 157.3 MB. Free memory was 121.9 MB in the beginning and 120.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:36:59,983 INFO L168 Benchmark]: RCFGBuilder took 551.88 ms. Allocated memory is still 157.3 MB. Free memory was 120.2 MB in the beginning and 136.7 MB in the end (delta: -16.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. [2021-02-23 17:36:59,984 INFO L168 Benchmark]: TraceAbstraction took 1247.04 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 136.2 MB in the beginning and 166.0 MB in the end (delta: -29.8 MB). Peak memory consumption was 1.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:36:59,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 130.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.50 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 122.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.70 ms. Allocated memory is still 157.3 MB. Free memory was 121.9 MB in the beginning and 120.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 551.88 ms. Allocated memory is still 157.3 MB. Free memory was 120.2 MB in the beginning and 136.7 MB in the end (delta: -16.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1247.04 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 136.2 MB in the beginning and 166.0 MB in the end (delta: -29.8 MB). Peak memory consumption was 1.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 54]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of someUnaryDOUBLEoperation at line 49, overapproximation of bitwiseAnd at line 37. Possible FailurePath: [L49] double x = -0.0; [L50] CALL, EXPR fabs_double(x) [L28] __uint32_t high; [L30] ieee_double_shape_type gh_u; [L31] gh_u.value = (x) [L32] EXPR gh_u.parts.msw [L32] (high) = gh_u.parts.msw [L35] ieee_double_shape_type sh_u; [L36] sh_u.value = (x) [L37] sh_u.parts.msw = (high & 0x7fffffff) [L38] EXPR sh_u.value [L38] (x) = sh_u.value [L40] return x; [L50] RET, EXPR fabs_double(x) [L50] double res = fabs_double(x); [L53] EXPR res == 0.0 && __signbit_double(res) == 0 [L53] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L54] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 11 SDslu, 42 SDs, 0 SdLazy, 78 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s 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=69occurred 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: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...