/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-72570d3 [2020-08-22 21:50:00,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:50:00,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:50:00,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 21:50:00,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:50:00,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:50:00,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:50:00,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:50:00,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:50:00,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:50:00,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:50:00,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:50:00,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:50:00,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:50:00,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:50:00,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:50:00,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:50:00,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:50:00,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:50:00,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:50:00,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:50:00,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:50:00,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:50:00,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:50:00,750 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:50:00,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:50:00,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:50:00,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:50:00,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:50:00,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:50:00,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:50:00,752 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:50:00,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:50:00,752 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:50:00,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:50:00,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:50:00,753 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:50:00,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:50:00,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:50:00,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:50:00,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:50:00,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:50:00,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:50:00,754 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-08-22 21:50:01,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:50:01,049 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:50:01,052 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:50:01,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:50:01,054 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:50:01,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-08-22 21:50:01,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/820a1984b/e2c13852114c4d979797485bcbebf0e5/FLAG5d5d2a12d [2020-08-22 21:50:01,564 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:50:01,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-08-22 21:50:01,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/820a1984b/e2c13852114c4d979797485bcbebf0e5/FLAG5d5d2a12d [2020-08-22 21:50:01,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/820a1984b/e2c13852114c4d979797485bcbebf0e5 [2020-08-22 21:50:01,948 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:50:01,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:50:01,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:01,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:50:01,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:50:01,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:01" (1/1) ... [2020-08-22 21:50:01,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ce80f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:01, skipping insertion in model container [2020-08-22 21:50:01,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:01" (1/1) ... [2020-08-22 21:50:01,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:50:01,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:50:02,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:02,178 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:50:02,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:02,315 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:50:02,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02 WrapperNode [2020-08-22 21:50:02,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:02,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:50:02,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:50:02,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:50:02,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (1/1) ... [2020-08-22 21:50:02,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (1/1) ... [2020-08-22 21:50:02,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (1/1) ... [2020-08-22 21:50:02,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (1/1) ... [2020-08-22 21:50:02,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (1/1) ... [2020-08-22 21:50:02,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (1/1) ... [2020-08-22 21:50:02,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (1/1) ... [2020-08-22 21:50:02,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:50:02,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:50:02,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:50:02,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:50:02,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (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 [2020-08-22 21:50:02,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:50:02,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:50:02,448 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-08-22 21:50:02,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-08-22 21:50:02,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:50:02,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:50:02,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-22 21:50:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-08-22 21:50:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-08-22 21:50:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 21:50:02,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 21:50:02,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 21:50:02,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 21:50:02,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 21:50:02,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 21:50:02,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:50:02,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:50:02,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:50:02,852 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:50:02,853 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 21:50:02,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:02 BoogieIcfgContainer [2020-08-22 21:50:02,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:50:02,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:50:02,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:50:02,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:50:02,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:50:01" (1/3) ... [2020-08-22 21:50:02,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d933cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:02, skipping insertion in model container [2020-08-22 21:50:02,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:02" (2/3) ... [2020-08-22 21:50:02,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d933cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:02, skipping insertion in model container [2020-08-22 21:50:02,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:02" (3/3) ... [2020-08-22 21:50:02,866 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2020-08-22 21:50:02,876 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:50:02,883 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:50:02,904 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:50:02,930 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:50:02,930 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:50:02,931 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:50:02,931 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:50:02,931 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:50:02,931 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:50:02,931 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:50:02,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:50:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-08-22 21:50:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 21:50:02,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:02,960 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] [2020-08-22 21:50:02,960 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2082497467, now seen corresponding path program 1 times [2020-08-22 21:50:02,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:02,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951707539] [2020-08-22 21:50:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:03,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:50:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:03,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 21:50:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:03,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 21:50:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 21:50:03,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951707539] [2020-08-22 21:50:03,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:50:03,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 21:50:03,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410495955] [2020-08-22 21:50:03,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:50:03,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:50:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:50:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:50:03,246 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 4 states. [2020-08-22 21:50:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:50:03,602 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-08-22 21:50:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:50:03,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-08-22 21:50:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:50:03,618 INFO L225 Difference]: With dead ends: 188 [2020-08-22 21:50:03,618 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 21:50:03,622 INFO L675 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 [2020-08-22 21:50:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 21:50:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-08-22 21:50:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 21:50:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-08-22 21:50:03,677 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 38 [2020-08-22 21:50:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:50:03,677 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-08-22 21:50:03,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:50:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-08-22 21:50:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 21:50:03,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:03,680 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] [2020-08-22 21:50:03,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:50:03,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1948696332, now seen corresponding path program 1 times [2020-08-22 21:50:03,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:03,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756757709] [2020-08-22 21:50:03,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:03,731 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:03,780 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:03,835 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 21:50:03,849 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 21:50:03,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:50:03,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 09:50:03 BoogieIcfgContainer [2020-08-22 21:50:03,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 21:50:03,908 INFO L168 Benchmark]: Toolchain (without parser) took 1957.01 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 102.0 MB in the beginning and 202.7 MB in the end (delta: -100.7 MB). Peak memory consumption was 83.8 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:03,909 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 21:50:03,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.66 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 181.6 MB in the end (delta: -79.8 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:03,912 INFO L168 Benchmark]: Boogie Preprocessor took 47.84 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 179.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:03,913 INFO L168 Benchmark]: RCFGBuilder took 493.52 ms. Allocated memory is still 203.4 MB. Free memory was 179.3 MB in the beginning and 153.6 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:03,915 INFO L168 Benchmark]: TraceAbstraction took 1045.59 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 153.0 MB in the beginning and 202.7 MB in the end (delta: -49.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:03,923 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 365.66 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 181.6 MB in the end (delta: -79.8 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.84 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 179.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 493.52 ms. Allocated memory is still 203.4 MB. Free memory was 179.3 MB in the beginning and 153.6 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1045.59 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 153.0 MB in the beginning and 202.7 MB in the end (delta: -49.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 96]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 13, overapproximation of someBinaryArithmeticFLOAToperation at line 30, overapproximation of bitwiseAnd at line 27. Possible FailurePath: [L15] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [\old(one_sqrt)=4294967301, \old(tiny_sqrt)=4294967299, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L91] float x = 0.0f / 0.0f; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L92] CALL, EXPR __ieee754_sqrtf(x) VAL [\old(x)=4294967302, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L18] float z; VAL [\old(x)=4294967302, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L19] __uint32_t r, hx; VAL [\old(x)=4294967302, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L20] __int32_t ix, s, q, m, t, i; VAL [\old(x)=4294967302, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L23] ieee_float_shape_type gf_u; VAL [\old(x)=4294967302, gf_u={2:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L24] gf_u.value = (x) VAL [\old(x)=4294967302, gf_u={2:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L25] EXPR gf_u.word VAL [\old(x)=4294967302, gf_u={2:0}, gf_u.word=4294967295, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L25] (ix) = gf_u.word VAL [\old(x)=4294967302, gf_u={2:0}, gf_u.word=4294967295, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L27] hx = ix & 0x7fffffff VAL [\old(x)=4294967302, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L29] COND TRUE !((hx) < 0x7f800000L) VAL [\old(x)=4294967302, hx=2139095040, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L30] return x * x + x; VAL [\old(x)=4294967302, hx=2139095040, ix=-1, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L92] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=4294967300, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L92] float res = __ieee754_sqrtf(x); VAL [__ieee754_sqrtf(x)=4294967300, one_sqrt=1, res=4294967300, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L95] CALL, EXPR isnan_float(res) VAL [\old(x)=4294967300, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L13] return x != x; VAL [\old(x)=4294967300, \result=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=4294967300] [L95] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=4294967300, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L95] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=4294967300, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] [L96] __VERIFIER_error() VAL [one_sqrt=1, res=4294967300, tiny_sqrt=1/1000000000000000000000000000000, x=4294967302] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 105 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: 112 SDtfs, 29 SDslu, 83 SDs, 0 SdLazy, 110 SolverSat, 6 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=105occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 2368 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...