/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 04:46:41,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 04:46:41,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 04:46:41,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 04:46:41,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 04:46:41,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 04:46:41,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 04:46:41,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 04:46:41,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 04:46:41,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 04:46:41,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 04:46:41,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 04:46:41,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 04:46:41,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 04:46:41,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 04:46:41,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 04:46:41,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 04:46:41,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 04:46:41,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 04:46:41,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 04:46:41,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 04:46:41,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 04:46:41,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 04:46:41,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 04:46:41,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 04:46:41,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 04:46:41,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 04:46:41,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 04:46:41,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 04:46:41,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 04:46:41,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 04:46:41,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 04:46:41,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 04:46:41,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 04:46:41,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 04:46:41,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 04:46:41,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 04:46:41,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 04:46:41,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 04:46:41,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 04:46:41,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 04:46:41,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 04:46:41,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 04:46:41,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 04:46:41,250 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 04:46:41,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 04:46:41,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 04:46:41,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:46:41,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 04:46:41,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 04:46:41,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 04:46:41,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 04:46:41,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 04:46:41,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 04:46:41,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 04:46:41,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 04:46:41,742 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 04:46:41,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-11-07 04:46:41,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72cfd3c16/79cfd58624574635822b6c4e669face7/FLAG840c61118 [2020-11-07 04:46:42,360 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 04:46:42,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-11-07 04:46:42,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72cfd3c16/79cfd58624574635822b6c4e669face7/FLAG840c61118 [2020-11-07 04:46:42,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72cfd3c16/79cfd58624574635822b6c4e669face7 [2020-11-07 04:46:42,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 04:46:42,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 04:46:42,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 04:46:42,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 04:46:42,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 04:46:42,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:42" (1/1) ... [2020-11-07 04:46:42,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec1d174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:42, skipping insertion in model container [2020-11-07 04:46:42,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:42" (1/1) ... [2020-11-07 04:46:42,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 04:46:42,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 04:46:42,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:46:42,964 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 04:46:42,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:46:43,006 INFO L208 MainTranslator]: Completed translation [2020-11-07 04:46:43,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43 WrapperNode [2020-11-07 04:46:43,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 04:46:43,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 04:46:43,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 04:46:43,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 04:46:43,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (1/1) ... [2020-11-07 04:46:43,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (1/1) ... [2020-11-07 04:46:43,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (1/1) ... [2020-11-07 04:46:43,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (1/1) ... [2020-11-07 04:46:43,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (1/1) ... [2020-11-07 04:46:43,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (1/1) ... [2020-11-07 04:46:43,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (1/1) ... [2020-11-07 04:46:43,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 04:46:43,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 04:46:43,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 04:46:43,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 04:46:43,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (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 [2020-11-07 04:46:43,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 04:46:43,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 04:46:43,123 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 04:46:43,124 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-11-07 04:46:43,124 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-11-07 04:46:43,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 04:46:43,124 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 04:46:43,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 04:46:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 04:46:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 04:46:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-11-07 04:46:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 04:46:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 04:46:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 04:46:43,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 04:46:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 04:46:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-11-07 04:46:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 04:46:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 04:46:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 04:46:43,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 04:46:43,520 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 04:46:43,520 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-07 04:46:43,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:43 BoogieIcfgContainer [2020-11-07 04:46:43,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 04:46:43,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 04:46:43,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 04:46:43,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 04:46:43,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:46:42" (1/3) ... [2020-11-07 04:46:43,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100f4f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:43, skipping insertion in model container [2020-11-07 04:46:43,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:43" (2/3) ... [2020-11-07 04:46:43,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100f4f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:43, skipping insertion in model container [2020-11-07 04:46:43,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:43" (3/3) ... [2020-11-07 04:46:43,531 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1071.c [2020-11-07 04:46:43,547 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 04:46:43,550 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 04:46:43,566 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 04:46:43,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 04:46:43,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 04:46:43,592 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 04:46:43,593 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 04:46:43,593 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 04:46:43,593 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 04:46:43,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 04:46:43,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 04:46:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-11-07 04:46:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 04:46:43,623 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:46:43,624 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] [2020-11-07 04:46:43,624 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:46:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:46:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash -432121761, now seen corresponding path program 1 times [2020-11-07 04:46:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:46:43,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802844960] [2020-11-07 04:46:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:46:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:43,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:46:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:43,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 04:46:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 04:46:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 04:46:44,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802844960] [2020-11-07 04:46:44,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:46:44,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 04:46:44,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489384920] [2020-11-07 04:46:44,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 04:46:44,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:46:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 04:46:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 04:46:44,032 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 4 states. [2020-11-07 04:46:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:46:44,302 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2020-11-07 04:46:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 04:46:44,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-11-07 04:46:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:46:44,314 INFO L225 Difference]: With dead ends: 137 [2020-11-07 04:46:44,314 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 04:46:44,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 04:46:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 04:46:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-07 04:46:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-07 04:46:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-11-07 04:46:44,372 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 38 [2020-11-07 04:46:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:46:44,373 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-11-07 04:46:44,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 04:46:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-11-07 04:46:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-07 04:46:44,376 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:46:44,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 04:46:44,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 04:46:44,377 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:46:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:46:44,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1638820709, now seen corresponding path program 1 times [2020-11-07 04:46:44,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:46:44,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9492858] [2020-11-07 04:46:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:46:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:46:44,468 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:46:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:46:44,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:46:44,571 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 04:46:44,572 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 04:46:44,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 04:46:44,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:46:44 BoogieIcfgContainer [2020-11-07 04:46:44,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 04:46:44,670 INFO L168 Benchmark]: Toolchain (without parser) took 1923.86 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 65.4 MB in the end (delta: 61.9 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:44,671 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 04:46:44,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.91 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:44,673 INFO L168 Benchmark]: Boogie Preprocessor took 43.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 114.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:44,674 INFO L168 Benchmark]: RCFGBuilder took 470.93 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 128.3 MB in the end (delta: -13.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:44,675 INFO L168 Benchmark]: TraceAbstraction took 1142.99 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 65.4 MB in the end (delta: 62.4 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:44,679 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 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.91 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 114.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 470.93 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 128.3 MB in the end (delta: -13.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1142.99 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 65.4 MB in the end (delta: 62.4 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 46, overapproximation of someBinaryArithmeticFLOAToperation at line 40, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L54] float x = 0.0f / 0.0f; [L55] CALL, EXPR trunc_float(x) VAL [\old(x)=4294967299] [L15] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=4294967299, x=4294967299] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=4294967299, gf_u={3:0}, x=4294967299] [L18] gf_u.value = (x) VAL [\old(x)=4294967299, gf_u={3:0}, x=4294967299] [L19] EXPR gf_u.word VAL [\old(x)=4294967299, gf_u={3:0}, gf_u.word=4294967294, x=4294967299] [L19] (w) = gf_u.word VAL [(w) = gf_u.word=4294967302, \old(x)=4294967299, gf_u={3:0}, gf_u.word=4294967294, w=-2, x=4294967299] [L21] signbit = w & 0x80000000 VAL [\old(x)=4294967299, signbit=-1, w=-2, x=4294967299] [L22] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L23] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L39] COND TRUE exponent_less_127 == 255 VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L40] return x + x; VAL [\old(x)=4294967299, exponent_less_127=255, signbit=-1, w=-2, x=4294967299] [L55] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967301, x=4294967299] [L55] float res = trunc_float(x); VAL [res=4294967301, trunc_float(x)=4294967301, x=4294967299] [L58] CALL, EXPR isnan_float(res) VAL [\old(x)=4294967301] [L46] return x != x; VAL [\old(x)=4294967301, \result=0, x=4294967301] [L58] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=4294967301, x=4294967299] [L58] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, res=4294967301, x=4294967299] [L59] CALL reach_error() [L4] __assert_fail("0", "float_req_bl_1071.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 19 SDslu, 43 SDs, 0 SdLazy, 86 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred 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, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 2923 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...