/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 03:55:55,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 03:55:55,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 03:55:55,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 03:55:55,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 03:55:55,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 03:55:55,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 03:55:55,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 03:55:55,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 03:55:55,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 03:55:55,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 03:55:55,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 03:55:55,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 03:55:55,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 03:55:55,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 03:55:55,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 03:55:55,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 03:55:55,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 03:55:55,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 03:55:55,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 03:55:55,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 03:55:55,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 03:55:55,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 03:55:55,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 03:55:55,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 03:55:55,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 03:55:55,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 03:55:55,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 03:55:55,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 03:55:55,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 03:55:55,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 03:55:55,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 03:55:55,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 03:55:55,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 03:55:55,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 03:55:55,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 03:55:55,886 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 03:55:55,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 03:55:55,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 03:55:55,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:55:55,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 03:55:55,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 03:55:55,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 03:55:55,887 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 03:55:55,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 03:55:56,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 03:55:56,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 03:55:56,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 03:55:56,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 03:55:56,298 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 03:55:56,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2021-02-24 03:55:56,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9069ba965/d93d5a6cdf0a44349a460ed2274bb15a/FLAG8d06345ea [2021-02-24 03:55:56,966 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 03:55:56,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2021-02-24 03:55:56,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9069ba965/d93d5a6cdf0a44349a460ed2274bb15a/FLAG8d06345ea [2021-02-24 03:55:57,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9069ba965/d93d5a6cdf0a44349a460ed2274bb15a [2021-02-24 03:55:57,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 03:55:57,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 03:55:57,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 03:55:57,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 03:55:57,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 03:55:57,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@274d0de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57, skipping insertion in model container [2021-02-24 03:55:57,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 03:55:57,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 03:55:57,618 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_1032a.c[1751,1764] [2021-02-24 03:55:57,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:55:57,630 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 03:55:57,656 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_1032a.c[1751,1764] [2021-02-24 03:55:57,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:55:57,673 INFO L208 MainTranslator]: Completed translation [2021-02-24 03:55:57,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57 WrapperNode [2021-02-24 03:55:57,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 03:55:57,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 03:55:57,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 03:55:57,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 03:55:57,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (1/1) ... [2021-02-24 03:55:57,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 03:55:57,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 03:55:57,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 03:55:57,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 03:55:57,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (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 [2021-02-24 03:55:57,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 03:55:57,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 03:55:57,814 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 03:55:57,814 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2021-02-24 03:55:57,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-24 03:55:57,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 03:55:57,814 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 03:55:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 03:55:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 03:55:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 03:55:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-24 03:55:57,815 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2021-02-24 03:55:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-24 03:55:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 03:55:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 03:55:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 03:55:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-24 03:55:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-24 03:55:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 03:55:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 03:55:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 03:55:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 03:55:58,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 03:55:58,227 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-24 03:55:58,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:55:58 BoogieIcfgContainer [2021-02-24 03:55:58,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 03:55:58,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 03:55:58,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 03:55:58,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 03:55:58,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:55:57" (1/3) ... [2021-02-24 03:55:58,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb9324e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:55:58, skipping insertion in model container [2021-02-24 03:55:58,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:57" (2/3) ... [2021-02-24 03:55:58,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb9324e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:55:58, skipping insertion in model container [2021-02-24 03:55:58,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:55:58" (3/3) ... [2021-02-24 03:55:58,238 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032a.c [2021-02-24 03:55:58,245 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 03:55:58,249 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 03:55:58,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 03:55:58,290 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 03:55:58,290 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 03:55:58,291 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 03:55:58,291 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 03:55:58,291 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 03:55:58,291 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 03:55:58,291 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 03:55:58,291 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 03:55:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2021-02-24 03:55:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 03:55:58,317 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:55:58,318 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] [2021-02-24 03:55:58,318 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:55:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:55:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash -361418639, now seen corresponding path program 1 times [2021-02-24 03:55:58,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:55:58,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329037290] [2021-02-24 03:55:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:55:58,405 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:55:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:58,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:58,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:58,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:58,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:58,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:55:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:58,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:58,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:58,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 03:55:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:58,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:58,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:58,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:58,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 03:55:58,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329037290] [2021-02-24 03:55:58,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:55:58,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 03:55:58,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200555654] [2021-02-24 03:55:58,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 03:55:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:55:58,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 03:55:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 03:55:58,733 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 4 states. [2021-02-24 03:55:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:55:58,959 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2021-02-24 03:55:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 03:55:58,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-02-24 03:55:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:55:58,971 INFO L225 Difference]: With dead ends: 148 [2021-02-24 03:55:58,971 INFO L226 Difference]: Without dead ends: 75 [2021-02-24 03:55:58,975 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 [2021-02-24 03:55:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-24 03:55:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-02-24 03:55:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-24 03:55:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-02-24 03:55:59,095 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 32 [2021-02-24 03:55:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:55:59,096 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-02-24 03:55:59,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 03:55:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-02-24 03:55:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-24 03:55:59,099 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:55:59,099 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] [2021-02-24 03:55:59,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 03:55:59,100 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:55:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:55:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash -829035821, now seen corresponding path program 1 times [2021-02-24 03:55:59,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:55:59,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744060805] [2021-02-24 03:55:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:55:59,113 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:55:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:55:59,208 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:55:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:55:59,248 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:55:59,282 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 03:55:59,282 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 03:55:59,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 03:55:59,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:55:59 BoogieIcfgContainer [2021-02-24 03:55:59,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 03:55:59,312 INFO L168 Benchmark]: Toolchain (without parser) took 1983.73 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 142.4 MB in the beginning and 173.2 MB in the end (delta: -30.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:59,312 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 166.7 MB. Free memory is still 138.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:55:59,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.49 ms. Allocated memory is still 166.7 MB. Free memory was 141.3 MB in the beginning and 131.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:59,314 INFO L168 Benchmark]: Boogie Preprocessor took 42.03 ms. Allocated memory is still 166.7 MB. Free memory was 131.1 MB in the beginning and 129.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:59,315 INFO L168 Benchmark]: RCFGBuilder took 511.91 ms. Allocated memory is still 166.7 MB. Free memory was 129.3 MB in the beginning and 143.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:59,316 INFO L168 Benchmark]: TraceAbstraction took 1078.50 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 143.2 MB in the beginning and 173.2 MB in the end (delta: -30.0 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:59,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 166.7 MB. Free memory is still 138.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 327.49 ms. Allocated memory is still 166.7 MB. Free memory was 141.3 MB in the beginning and 131.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.03 ms. Allocated memory is still 166.7 MB. Free memory was 131.1 MB in the beginning and 129.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 511.91 ms. Allocated memory is still 166.7 MB. Free memory was 129.3 MB in the beginning and 143.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1078.50 ms. Allocated memory was 166.7 MB in the beginning and 200.3 MB in the end (delta: 33.6 MB). Free memory was 143.2 MB in the beginning and 173.2 MB in the end (delta: -30.0 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 82]: 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 81, overapproximation of bitwiseAnd at line 25, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L77] float x = 0.0f; [L78] CALL, EXPR round_float(x) [L15] __uint32_t w; [L17] int exponent_less_127; [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (w) = gf_u.word [L25] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L27] COND FALSE !(exponent_less_127 < 23) [L43] COND TRUE exponent_less_127 == 128 [L45] return x + x; [L78] RET, EXPR round_float(x) [L78] float res = round_float(x); [L81] EXPR res == 0.0f && __signbit_float(res) == 0 [L81] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L82] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 86 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: 84 SDtfs, 13 SDslu, 61 SDs, 0 SdLazy, 95 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=83occurred 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...