/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/float_req_bl_1011a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:10:30,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:10:30,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:10:30,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:10:30,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:10:30,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:10:30,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:10:30,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:10:30,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:10:30,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:10:30,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:10:30,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:10:30,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:10:30,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:10:30,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:10:30,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:10:30,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:10:30,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:10:30,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:10:30,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:10:30,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:10:30,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:10:30,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:10:30,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:10:30,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:10:30,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:10:30,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:10:30,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:10:30,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:10:30,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:10:30,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:10:30,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:10:30,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:10:30,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:10:30,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:10:30,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:10:30,721 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:10:30,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:10:30,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:10:30,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:10:30,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:10:30,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:10:30,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:10:30,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:10:31,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:10:31,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:10:31,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:10:31,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:10:31,173 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:10:31,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2021-02-21 20:10:31,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c24732f/53e6da21aa514c168716b6fc0de8f8f3/FLAG8631dd92e [2021-02-21 20:10:31,903 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:10:31,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2021-02-21 20:10:31,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c24732f/53e6da21aa514c168716b6fc0de8f8f3/FLAG8631dd92e [2021-02-21 20:10:32,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c24732f/53e6da21aa514c168716b6fc0de8f8f3 [2021-02-21 20:10:32,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:10:32,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:10:32,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:32,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:10:32,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:10:32,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a68d490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32, skipping insertion in model container [2021-02-21 20:10:32,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:10:32,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:10:32,498 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_1011a.c[1145,1158] [2021-02-21 20:10:32,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:32,511 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:10:32,533 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_1011a.c[1145,1158] [2021-02-21 20:10:32,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:32,552 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:10:32,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32 WrapperNode [2021-02-21 20:10:32,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:32,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:10:32,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:10:32,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:10:32,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (1/1) ... [2021-02-21 20:10:32,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:10:32,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:10:32,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:10:32,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:10:32,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (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 [2021-02-21 20:10:32,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:10:32,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:10:32,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:10:32,702 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2021-02-21 20:10:32,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-21 20:10:32,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:10:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:10:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:10:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:10:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:10:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-21 20:10:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2021-02-21 20:10:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 20:10:32,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:10:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:10:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:10:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 20:10:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-21 20:10:32,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:10:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:10:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:10:32,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:10:33,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:10:33,198 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-21 20:10:33,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:33 BoogieIcfgContainer [2021-02-21 20:10:33,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:10:33,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:10:33,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:10:33,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:10:33,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:10:32" (1/3) ... [2021-02-21 20:10:33,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a40101c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:33, skipping insertion in model container [2021-02-21 20:10:33,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:32" (2/3) ... [2021-02-21 20:10:33,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a40101c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:33, skipping insertion in model container [2021-02-21 20:10:33,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:33" (3/3) ... [2021-02-21 20:10:33,211 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011a.c [2021-02-21 20:10:33,219 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:10:33,225 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:10:33,247 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:10:33,274 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:10:33,275 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:10:33,275 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:10:33,275 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:10:33,275 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:10:33,276 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:10:33,276 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:10:33,276 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:10:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2021-02-21 20:10:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 20:10:33,308 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:33,309 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] [2021-02-21 20:10:33,309 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash -678865854, now seen corresponding path program 1 times [2021-02-21 20:10:33,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:33,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138709233] [2021-02-21 20:10:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:33,411 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:33,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:33,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:33,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:33,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:33,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:10:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:33,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:33,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:33,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:10:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:33,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:33,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:33,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:33,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:10:33,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138709233] [2021-02-21 20:10:33,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:10:33,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:10:33,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243363457] [2021-02-21 20:10:33,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:10:33,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:10:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:10:33,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:10:33,753 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2021-02-21 20:10:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:10:33,981 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-02-21 20:10:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:10:33,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 20:10:33,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:10:33,991 INFO L225 Difference]: With dead ends: 119 [2021-02-21 20:10:33,992 INFO L226 Difference]: Without dead ends: 60 [2021-02-21 20:10:33,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:10:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-02-21 20:10:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-02-21 20:10:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-21 20:10:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-02-21 20:10:34,053 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 29 [2021-02-21 20:10:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:10:34,054 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-02-21 20:10:34,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:10:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-02-21 20:10:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 20:10:34,056 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:34,057 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] [2021-02-21 20:10:34,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:10:34,057 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2546907, now seen corresponding path program 1 times [2021-02-21 20:10:34,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:34,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026024670] [2021-02-21 20:10:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:34,063 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:10:34,107 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:10:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:10:34,162 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:10:34,226 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:10:34,226 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:10:34,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:10:34,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:10:34 BoogieIcfgContainer [2021-02-21 20:10:34,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:10:34,256 INFO L168 Benchmark]: Toolchain (without parser) took 1959.43 ms. Allocated memory was 161.5 MB in the beginning and 207.6 MB in the end (delta: 46.1 MB). Free memory was 137.1 MB in the beginning and 185.7 MB in the end (delta: -48.6 MB). Peak memory consumption was 55.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:34,258 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 161.5 MB. Free memory is still 134.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:10:34,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.31 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 126.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:34,264 INFO L168 Benchmark]: Boogie Preprocessor took 38.85 ms. Allocated memory is still 161.5 MB. Free memory was 126.2 MB in the beginning and 124.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:34,268 INFO L168 Benchmark]: RCFGBuilder took 606.81 ms. Allocated memory is still 161.5 MB. Free memory was 124.4 MB in the beginning and 139.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:34,269 INFO L168 Benchmark]: TraceAbstraction took 1050.66 ms. Allocated memory was 161.5 MB in the beginning and 207.6 MB in the end (delta: 46.1 MB). Free memory was 138.5 MB in the beginning and 185.7 MB in the end (delta: -47.3 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:34,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 161.5 MB. Free memory is still 134.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.31 ms. Allocated memory is still 161.5 MB. Free memory was 136.0 MB in the beginning and 126.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.85 ms. Allocated memory is still 161.5 MB. Free memory was 126.2 MB in the beginning and 124.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 606.81 ms. Allocated memory is still 161.5 MB. Free memory was 124.4 MB in the beginning and 139.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1050.66 ms. Allocated memory was 161.5 MB in the beginning and 207.6 MB in the end (delta: 46.1 MB). Free memory was 138.5 MB in the beginning and 185.7 MB in the end (delta: -47.3 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 52]: 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 51, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L47] float x = 0.0f; [L48] CALL, EXPR fabs_float(x) [L15] __uint32_t ix; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (ix) = gf_u.word [L22] ieee_float_shape_type sf_u; [L23] sf_u.word = (ix & 0x7fffffff) [L24] EXPR sf_u.value [L24] (x) = sf_u.value [L26] return x; [L48] RET, EXPR fabs_float(x) [L48] float res = fabs_float(x); [L51] EXPR res == 0.0f && __signbit_float(res) == 0 [L51] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L52] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 11 SDslu, 42 SDs, 0 SdLazy, 76 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred 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...