/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_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 04:45:54,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 04:45:54,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 04:45:54,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 04:45:54,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 04:45:54,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 04:45:54,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 04:45:54,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 04:45:54,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 04:45:54,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 04:45:54,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 04:45:54,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 04:45:54,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 04:45:54,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 04:45:54,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 04:45:54,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 04:45:54,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 04:45:54,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 04:45:54,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 04:45:54,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 04:45:54,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 04:45:54,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 04:45:54,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 04:45:54,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 04:45:54,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 04:45:54,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 04:45:54,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 04:45:54,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 04:45:54,865 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 04:45:54,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 04:45:54,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 04:45:54,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 04:45:54,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 04:45:54,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 04:45:54,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 04:45:54,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 04:45:54,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 04:45:54,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 04:45:54,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 04:45:54,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 04:45:54,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 04:45:54,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 04:45:54,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 04:45:54,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 04:45:54,897 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 04:45:54,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 04:45:54,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 04:45:54,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:45:54,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 04:45:54,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 04:45:54,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 04:45:54,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 04:45:55,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 04:45:55,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 04:45:55,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 04:45:55,409 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 04:45:55,409 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 04:45:55,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-11-07 04:45:55,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed049ccd2/174f419c302e464f8978b6a71fe958d8/FLAG636fe903d [2020-11-07 04:45:56,112 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 04:45:56,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-11-07 04:45:56,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed049ccd2/174f419c302e464f8978b6a71fe958d8/FLAG636fe903d [2020-11-07 04:45:56,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed049ccd2/174f419c302e464f8978b6a71fe958d8 [2020-11-07 04:45:56,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 04:45:56,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 04:45:56,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 04:45:56,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 04:45:56,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 04:45:56,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a35012e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56, skipping insertion in model container [2020-11-07 04:45:56,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 04:45:56,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 04:45:56,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:45:56,700 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 04:45:56,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:45:56,751 INFO L208 MainTranslator]: Completed translation [2020-11-07 04:45:56,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56 WrapperNode [2020-11-07 04:45:56,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 04:45:56,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 04:45:56,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 04:45:56,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 04:45:56,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (1/1) ... [2020-11-07 04:45:56,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 04:45:56,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 04:45:56,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 04:45:56,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 04:45:56,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (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 04:45:56,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 04:45:56,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 04:45:56,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 04:45:56,974 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-11-07 04:45:56,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-11-07 04:45:56,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 04:45:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 04:45:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 04:45:56,975 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 04:45:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 04:45:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-07 04:45:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-11-07 04:45:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-11-07 04:45:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 04:45:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 04:45:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 04:45:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 04:45:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 04:45:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 04:45:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 04:45:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 04:45:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 04:45:57,572 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 04:45:57,573 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-07 04:45:57,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:45:57 BoogieIcfgContainer [2020-11-07 04:45:57,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 04:45:57,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 04:45:57,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 04:45:57,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 04:45:57,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:45:56" (1/3) ... [2020-11-07 04:45:57,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29abfd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:45:57, skipping insertion in model container [2020-11-07 04:45:57,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:45:56" (2/3) ... [2020-11-07 04:45:57,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29abfd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:45:57, skipping insertion in model container [2020-11-07 04:45:57,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:45:57" (3/3) ... [2020-11-07 04:45:57,585 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2020-11-07 04:45:57,600 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 04:45:57,604 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 04:45:57,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 04:45:57,642 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 04:45:57,642 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 04:45:57,642 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 04:45:57,642 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 04:45:57,642 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 04:45:57,643 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 04:45:57,643 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 04:45:57,643 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 04:45:57,661 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2020-11-07 04:45:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 04:45:57,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:45:57,672 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] [2020-11-07 04:45:57,673 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:45:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:45:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1632697738, now seen corresponding path program 1 times [2020-11-07 04:45:57,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:45:57,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313101398] [2020-11-07 04:45:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:45:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:45:57,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:45:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:45:58,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 04:45:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:45:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-07 04:45:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:45:58,074 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 04:45:58,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313101398] [2020-11-07 04:45:58,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:45:58,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 04:45:58,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260897614] [2020-11-07 04:45:58,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 04:45:58,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:45:58,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 04:45:58,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 04:45:58,100 INFO L87 Difference]: Start difference. First operand 113 states. Second operand 4 states. [2020-11-07 04:45:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:45:58,451 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2020-11-07 04:45:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 04:45:58,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-11-07 04:45:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:45:58,463 INFO L225 Difference]: With dead ends: 197 [2020-11-07 04:45:58,463 INFO L226 Difference]: Without dead ends: 104 [2020-11-07 04:45:58,467 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 [2020-11-07 04:45:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-07 04:45:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-11-07 04:45:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-07 04:45:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2020-11-07 04:45:58,527 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 44 [2020-11-07 04:45:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:45:58,527 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2020-11-07 04:45:58,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 04:45:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2020-11-07 04:45:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 04:45:58,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:45:58,530 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, 1, 1, 1, 1, 1, 1] [2020-11-07 04:45:58,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 04:45:58,531 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:45:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:45:58,532 INFO L82 PathProgramCache]: Analyzing trace with hash -503274692, now seen corresponding path program 1 times [2020-11-07 04:45:58,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:45:58,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538719107] [2020-11-07 04:45:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:45:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:45:58,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:45:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:45:58,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:45:58,740 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 04:45:58,740 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 04:45:58,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 04:45:58,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:45:58 BoogieIcfgContainer [2020-11-07 04:45:58,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 04:45:58,819 INFO L168 Benchmark]: Toolchain (without parser) took 2410.05 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 145.7 MB in the beginning and 123.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 55.5 MB. Max. memory is 8.0 GB. [2020-11-07 04:45:58,820 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 136.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 04:45:58,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.51 ms. Allocated memory is still 163.6 MB. Free memory was 144.9 MB in the beginning and 134.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 04:45:58,822 INFO L168 Benchmark]: Boogie Preprocessor took 119.13 ms. Allocated memory is still 163.6 MB. Free memory was 134.1 MB in the beginning and 145.9 MB in the end (delta: -11.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 04:45:58,823 INFO L168 Benchmark]: RCFGBuilder took 698.92 ms. Allocated memory is still 163.6 MB. Free memory was 145.9 MB in the beginning and 120.4 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2020-11-07 04:45:58,824 INFO L168 Benchmark]: TraceAbstraction took 1239.02 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 119.7 MB in the beginning and 123.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 30.6 MB. Max. memory is 8.0 GB. [2020-11-07 04:45:58,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 163.6 MB. Free memory is still 136.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 333.51 ms. Allocated memory is still 163.6 MB. Free memory was 144.9 MB in the beginning and 134.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 119.13 ms. Allocated memory is still 163.6 MB. Free memory was 134.1 MB in the beginning and 145.9 MB in the end (delta: -11.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 698.92 ms. Allocated memory is still 163.6 MB. Free memory was 145.9 MB in the beginning and 120.4 MB in the end (delta: 25.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1239.02 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 119.7 MB in the beginning and 123.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 30.6 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)=4294967299, \old(tiny_sqrt)=4294967307, 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)=4294967309, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L20] float z; VAL [\old(x)=4294967309, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L21] __uint32_t r, hx; VAL [\old(x)=4294967309, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L22] __int32_t ix, s, q, m, t, i; VAL [\old(x)=4294967309, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L25] ieee_float_shape_type gf_u; VAL [\old(x)=4294967309, gf_u={3:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L26] gf_u.value = (x) VAL [\old(x)=4294967309, gf_u={3:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L27] EXPR gf_u.word VAL [\old(x)=4294967309, gf_u={3:0}, gf_u.word=4294967295, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L27] (ix) = gf_u.word VAL [\old(x)=4294967309, gf_u={3:0}, gf_u.word=4294967295, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L29] hx = ix & 0x7fffffff VAL [\old(x)=4294967309, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L31] COND TRUE !((hx) < 0x7f800000L) VAL [\old(x)=4294967309, hx=2139095040, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L32] return x * x + x; VAL [\old(x)=4294967309, hx=2139095040, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L94] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=4294967297, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L94] float res = __ieee754_sqrtf(x); VAL [__ieee754_sqrtf(x)=4294967297, one_sqrt=1, res=4294967297, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L97] CALL, EXPR isnan_float(res) VAL [\old(x)=4294967297, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L15] return x != x; VAL [\old(x)=4294967297, \result=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967297] [L97] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=4294967297, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [L97] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=4294967297, tiny_sqrt=1/1000000000000000000000000000000, x=4294967309] [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, 113 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 118 SDtfs, 31 SDslu, 82 SDs, 0 SdLazy, 119 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=113occurred 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, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 3913 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...