/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 21:57:42,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 21:57:42,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 21:57:42,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 21:57:42,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 21:57:42,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 21:57:42,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 21:57:42,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 21:57:42,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 21:57:42,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 21:57:42,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 21:57:42,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 21:57:42,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 21:57:42,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 21:57:42,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 21:57:42,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 21:57:42,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 21:57:42,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 21:57:42,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 21:57:42,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 21:57:42,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 21:57:42,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 21:57:42,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 21:57:42,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 21:57:42,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 21:57:42,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 21:57:42,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 21:57:42,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 21:57:42,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 21:57:42,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 21:57:42,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 21:57:42,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 21:57:42,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 21:57:42,884 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 21:57:42,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 21:57:42,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 21:57:42,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 21:57:42,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 21:57:42,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 21:57:42,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 21:57:42,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 21:57:42,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 21:57:42,888 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 21:57:42,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 21:57:42,888 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 21:57:42,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 21:57:42,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 21:57:42,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 21:57:42,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 21:57:42,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 21:57:42,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:57:42,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 21:57:42,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 21:57:42,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 21:57:42,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 21:57:42,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 21:57:42,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 21:57:42,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 21:57:42,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 21:57:43,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 21:57:43,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 21:57:43,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 21:57:43,349 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 21:57:43,350 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 21:57:43,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-11-06 21:57:43,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e37360cc/c4498f04b2e94b4b83bea277ab7c6b83/FLAG2a934a484 [2020-11-06 21:57:44,096 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 21:57:44,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-11-06 21:57:44,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e37360cc/c4498f04b2e94b4b83bea277ab7c6b83/FLAG2a934a484 [2020-11-06 21:57:44,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e37360cc/c4498f04b2e94b4b83bea277ab7c6b83 [2020-11-06 21:57:44,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 21:57:44,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 21:57:44,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 21:57:44,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 21:57:44,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 21:57:44,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3d2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44, skipping insertion in model container [2020-11-06 21:57:44,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 21:57:44,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 21:57:44,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:57:44,743 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 21:57:44,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:57:44,793 INFO L208 MainTranslator]: Completed translation [2020-11-06 21:57:44,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44 WrapperNode [2020-11-06 21:57:44,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 21:57:44,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 21:57:44,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 21:57:44,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 21:57:44,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... [2020-11-06 21:57:44,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 21:57:44,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 21:57:44,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 21:57:44,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 21:57:44,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:57:44,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 21:57:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 21:57:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 21:57:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-11-06 21:57:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-11-06 21:57:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 21:57:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 21:57:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 21:57:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 21:57:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 21:57:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-06 21:57:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-11-06 21:57:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-11-06 21:57:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-06 21:57:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 21:57:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 21:57:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 21:57:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-06 21:57:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 21:57:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 21:57:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 21:57:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 21:57:45,434 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 21:57:45,435 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-06 21:57:45,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:45 BoogieIcfgContainer [2020-11-06 21:57:45,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 21:57:45,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 21:57:45,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 21:57:45,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 21:57:45,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:44" (1/3) ... [2020-11-06 21:57:45,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b272460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:45, skipping insertion in model container [2020-11-06 21:57:45,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44" (2/3) ... [2020-11-06 21:57:45,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b272460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:45, skipping insertion in model container [2020-11-06 21:57:45,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:45" (3/3) ... [2020-11-06 21:57:45,460 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2020-11-06 21:57:45,478 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 21:57:45,481 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 21:57:45,494 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 21:57:45,523 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 21:57:45,524 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 21:57:45,524 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 21:57:45,524 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 21:57:45,524 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 21:57:45,524 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 21:57:45,525 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 21:57:45,525 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 21:57:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-11-06 21:57:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 21:57:45,551 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:57:45,552 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] [2020-11-06 21:57:45,553 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:57:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:57:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -538607920, now seen corresponding path program 1 times [2020-11-06 21:57:45,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:57:45,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420214925] [2020-11-06 21:57:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:57:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:57:45,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:57:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:57:45,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 21:57:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:57:45,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-06 21:57:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:57:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 21:57:45,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420214925] [2020-11-06 21:57:45,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:57:45,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 21:57:45,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968592485] [2020-11-06 21:57:45,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 21:57:45,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:57:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 21:57:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 21:57:46,001 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-11-06 21:57:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:57:46,250 INFO L93 Difference]: Finished difference Result 89 states and 124 transitions. [2020-11-06 21:57:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 21:57:46,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-11-06 21:57:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:57:46,263 INFO L225 Difference]: With dead ends: 89 [2020-11-06 21:57:46,264 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 21:57:46,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 21:57:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 21:57:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-06 21:57:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-06 21:57:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-11-06 21:57:46,322 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 22 [2020-11-06 21:57:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:57:46,322 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-11-06 21:57:46,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 21:57:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-11-06 21:57:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 21:57:46,324 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:57:46,324 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] [2020-11-06 21:57:46,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 21:57:46,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:57:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:57:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1113394345, now seen corresponding path program 1 times [2020-11-06 21:57:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:57:46,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627902801] [2020-11-06 21:57:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:57:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:57:46,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:57:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 21:57:46,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 21:57:46,502 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 21:57:46,502 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 21:57:46,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 21:57:46,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:57:46 BoogieIcfgContainer [2020-11-06 21:57:46,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 21:57:46,550 INFO L168 Benchmark]: Toolchain (without parser) took 2097.18 ms. Allocated memory is still 163.6 MB. Free memory was 138.9 MB in the beginning and 131.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 9.5 MB. Max. memory is 8.0 GB. [2020-11-06 21:57:46,551 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 131.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 21:57:46,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.49 ms. Allocated memory is still 163.6 MB. Free memory was 138.3 MB in the beginning and 127.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 21:57:46,553 INFO L168 Benchmark]: Boogie Preprocessor took 51.59 ms. Allocated memory is still 163.6 MB. Free memory was 127.5 MB in the beginning and 125.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 21:57:46,554 INFO L168 Benchmark]: RCFGBuilder took 597.47 ms. Allocated memory is still 163.6 MB. Free memory was 125.8 MB in the beginning and 138.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-11-06 21:57:46,555 INFO L168 Benchmark]: TraceAbstraction took 1100.51 ms. Allocated memory is still 163.6 MB. Free memory was 138.9 MB in the beginning and 131.4 MB in the end (delta: 7.5 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2020-11-06 21:57:46,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 131.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 329.49 ms. Allocated memory is still 163.6 MB. Free memory was 138.3 MB in the beginning and 127.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.59 ms. Allocated memory is still 163.6 MB. Free memory was 127.5 MB in the beginning and 125.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 597.47 ms. Allocated memory is still 163.6 MB. Free memory was 125.8 MB in the beginning and 138.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1100.51 ms. Allocated memory is still 163.6 MB. Free memory was 138.9 MB in the beginning and 131.4 MB in the end (delta: 7.5 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 32, overapproximation of bitwiseAnd at line 29. Possible FailurePath: [L17] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [\old(one_sqrt)=4294967300, \old(tiny_sqrt)=4294967308, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L93] float x = 0.0f / 0.0f; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L94] CALL, EXPR __ieee754_sqrtf(x) VAL [\old(x)=4294967299, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L20] float z; [L21] __uint32_t r, hx; [L22] __int32_t ix, s, q, m, t, i; VAL [\old(x)=4294967299, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967299] [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (ix) = gf_u.word [L29] hx = ix & 0x7fffffff VAL [\old(x)=4294967299, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967299] [L31] COND TRUE !((hx) < 0x7f800000L) [L32] return x * x + x; VAL [\old(x)=4294967299, hx=2139095040, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967299] [L94] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=4294967298, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967299] [L94] float res = __ieee754_sqrtf(x); [L97] CALL, EXPR isnan_float(res) VAL [\old(x)=4294967298, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L15] return x != x; VAL [\old(x)=4294967298, \result=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967298] [L97] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=4294967298, tiny_sqrt=1/1000000000000000000000000000000, x=4294967299] [L97] COND TRUE !isnan_float(res) [L98] CALL reach_error() VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L3] __assert_fail("0", "float_req_bl_0720.c", 3, "reach_error") VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 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: 55 SDtfs, 10 SDslu, 45 SDs, 0 SdLazy, 51 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 1449 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...