/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_1092b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:56:02,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:56:02,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:56:02,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:56:02,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:56:03,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:56:03,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:56:03,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:56:03,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:56:03,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:56:03,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:56:03,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:56:03,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:56:03,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:56:03,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:56:03,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:56:03,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:56:03,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:56:03,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:56:03,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:56:03,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:56:03,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:56:03,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:56:03,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:56:03,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:56:03,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:56:03,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:56:03,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:56:03,108 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 [2020-10-23 17:56:03,163 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:56:03,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:56:03,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:56:03,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:56:03,169 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:56:03,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:56:03,169 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:56:03,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:56:03,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:56:03,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:56:03,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:56:03,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:56:03,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:56:03,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:56:03,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:56:03,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:56:03,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:56:03,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:56:03,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:56:03,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:56:03,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:56:03,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:56:03,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:56:03,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:56:03,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:56:03,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:56:03,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:56:03,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:56:03,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:56:03,176 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:56:03,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:56:03,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:56:03,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:56:03,621 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:56:03,622 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:56:03,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092b.c [2020-10-23 17:56:03,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b4ba564/94c55aeff25c43dba322a30c5ff1b897/FLAG6026fe04e [2020-10-23 17:56:04,398 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:56:04,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092b.c [2020-10-23 17:56:04,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b4ba564/94c55aeff25c43dba322a30c5ff1b897/FLAG6026fe04e [2020-10-23 17:56:04,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b4ba564/94c55aeff25c43dba322a30c5ff1b897 [2020-10-23 17:56:04,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:56:04,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:56:04,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:04,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:56:04,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:56:04,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:04" (1/1) ... [2020-10-23 17:56:04,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6ee2dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:04, skipping insertion in model container [2020-10-23 17:56:04,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:04" (1/1) ... [2020-10-23 17:56:04,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:56:04,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:56:05,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:05,031 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:56:05,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:05,081 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:56:05,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05 WrapperNode [2020-10-23 17:56:05,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:05,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:56:05,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:56:05,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:56:05,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (1/1) ... [2020-10-23 17:56:05,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (1/1) ... [2020-10-23 17:56:05,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (1/1) ... [2020-10-23 17:56:05,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (1/1) ... [2020-10-23 17:56:05,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (1/1) ... [2020-10-23 17:56:05,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (1/1) ... [2020-10-23 17:56:05,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (1/1) ... [2020-10-23 17:56:05,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:56:05,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:56:05,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:56:05,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:56:05,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (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 [2020-10-23 17:56:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:56:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:56:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:56:05,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-10-23 17:56:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 17:56:05,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:56:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:56:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:56:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:56:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:56:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-10-23 17:56:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 17:56:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:56:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:56:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:56:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 17:56:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 17:56:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:56:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:56:05,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:56:05,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:56:05,956 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:56:05,956 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-23 17:56:05,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:05 BoogieIcfgContainer [2020-10-23 17:56:05,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:56:05,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:56:05,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:56:05,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:56:05,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:56:04" (1/3) ... [2020-10-23 17:56:05,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bc4f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:05, skipping insertion in model container [2020-10-23 17:56:05,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:05" (2/3) ... [2020-10-23 17:56:05,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bc4f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:05, skipping insertion in model container [2020-10-23 17:56:05,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:05" (3/3) ... [2020-10-23 17:56:05,974 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092b.c [2020-10-23 17:56:05,988 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:56:05,995 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:56:06,013 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:56:06,059 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:56:06,060 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:56:06,060 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:56:06,060 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:56:06,060 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:56:06,061 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:56:06,061 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:56:06,061 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:56:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-23 17:56:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 17:56:06,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:06,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:06,096 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -157164147, now seen corresponding path program 1 times [2020-10-23 17:56:06,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:06,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897435200] [2020-10-23 17:56:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:06,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:06,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:56:06,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897435200] [2020-10-23 17:56:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 17:56:06,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192252662] [2020-10-23 17:56:06,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:56:06,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:56:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 17:56:06,601 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2020-10-23 17:56:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:06,912 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2020-10-23 17:56:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 17:56:06,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-23 17:56:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:06,924 INFO L225 Difference]: With dead ends: 83 [2020-10-23 17:56:06,924 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 17:56:06,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 17:56:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 17:56:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-23 17:56:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 17:56:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-23 17:56:06,979 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 19 [2020-10-23 17:56:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:06,979 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-23 17:56:06,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:56:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-23 17:56:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 17:56:06,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:06,981 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] [2020-10-23 17:56:06,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:56:06,982 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:06,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1971757501, now seen corresponding path program 1 times [2020-10-23 17:56:06,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:06,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097659429] [2020-10-23 17:56:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:56:07,056 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:56:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:56:07,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:56:07,135 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:56:07,136 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:56:07,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:56:07,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:56:07 BoogieIcfgContainer [2020-10-23 17:56:07,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:56:07,177 INFO L168 Benchmark]: Toolchain (without parser) took 2434.14 ms. Allocated memory is still 152.0 MB. Free memory was 127.8 MB in the beginning and 100.2 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.9 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:07,177 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:56:07,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.15 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 116.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:07,179 INFO L168 Benchmark]: Boogie Preprocessor took 48.33 ms. Allocated memory is still 152.0 MB. Free memory was 116.6 MB in the beginning and 114.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:07,180 INFO L168 Benchmark]: RCFGBuilder took 826.64 ms. Allocated memory is still 152.0 MB. Free memory was 114.7 MB in the beginning and 94.7 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:07,181 INFO L168 Benchmark]: TraceAbstraction took 1210.34 ms. Allocated memory is still 152.0 MB. Free memory was 94.3 MB in the beginning and 100.2 MB in the end (delta: -5.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:56:07,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 152.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 330.15 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 116.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.33 ms. Allocated memory is still 152.0 MB. Free memory was 116.6 MB in the beginning and 114.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 826.64 ms. Allocated memory is still 152.0 MB. Free memory was 114.7 MB in the beginning and 94.7 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1210.34 ms. Allocated memory is still 152.0 MB. Free memory was 94.3 MB in the beginning and 100.2 MB in the end (delta: -5.9 MB). There was no memory consumed. 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 82, overapproximation of bitwiseAnd at line 23, overapproximation of someBinaryArithmeticFLOAToperation at line 46. Possible FailurePath: [L13] static const float huge_ceil = 1.0e30; VAL [\old(huge_ceil)=1000000000000000000000000000005, huge_ceil=1000000000000000000000000000000] [L78] float x = 0.0f; VAL [huge_ceil=1000000000000000000000000000000, x=0] [L79] CALL, EXPR ceil_float(x) VAL [\old(x)=0, huge_ceil=1000000000000000000000000000000] [L16] __int32_t i0, j0; [L17] __uint32_t i, ix; VAL [\old(x)=0, huge_ceil=1000000000000000000000000000000, x=0] [L19] ieee_float_shape_type gf_u; [L20] gf_u.value = (x) [L21] EXPR gf_u.word [L21] (i0) = gf_u.word [L23] ix = (i0 & 0x7fffffff) [L24] j0 = (ix >> 23) - 0x7f VAL [\old(x)=0, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=0, j0=384, x=0] [L25] COND FALSE !(j0 < 23) VAL [\old(x)=0, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=0, j0=384, x=0] [L45] COND TRUE !((ix) < 0x7f800000L) [L46] return x + x; VAL [\old(x)=0, huge_ceil=1000000000000000000000000000000, i=-36028792723996673, i0=0, j0=384, x=0] [L79] RET, EXPR ceil_float(x) VAL [ceil_float(x)=1000000000000000000000000000004, huge_ceil=1000000000000000000000000000000, x=0] [L79] float res = ceil_float(x); [L82] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [huge_ceil=1000000000000000000000000000000, res=1000000000000000000000000000004, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L82] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L83] CALL reach_error() VAL [huge_ceil=1000000000000000000000000000000] [L3] __assert_fail("0", "float_req_bl_1092b.c", 3, "reach_error") VAL [huge_ceil=1000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 8 SDslu, 43 SDs, 0 SdLazy, 48 SolverSat, 8 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, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 1134 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...