/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_1072d.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:50:28,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:50:28,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:50:28,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 21:50:28,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 21:50:28,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 21:50:28,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 21:50:28,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 21:50:28,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 21:50:28,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 21:50:28,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 21:50:28,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 21:50:28,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:50:28,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:50:28,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:50:28,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:50:28,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:50:28,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:50:28,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:50:28,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:50:28,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:50:28,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:50:28,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:50:28,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:50:28,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:50:28,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:50:28,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:50:28,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:50:28,519 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 21:50:28,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:50:28,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:50:28,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:50:28,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:50:28,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:50:28,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:50:28,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:50:28,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:50:28,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:50:28,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:50:28,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:50:28,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:50:28,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:50:28,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:50:28,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:50:28,532 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:50:28,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:50:28,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:50:28,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:50:28,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:50:28,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:50:28,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:50:28,533 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 21:50:28,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:50:28,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:50:28,864 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:50:28,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:50:28,865 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:50:28,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-22 21:50:28,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d985830ff/506db244172c4a09b5267d66d1e9e052/FLAG8af138cb0 [2020-08-22 21:50:29,384 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:50:29,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c [2020-08-22 21:50:29,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d985830ff/506db244172c4a09b5267d66d1e9e052/FLAG8af138cb0 [2020-08-22 21:50:29,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d985830ff/506db244172c4a09b5267d66d1e9e052 [2020-08-22 21:50:29,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:50:29,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:50:29,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:29,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:50:29,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:50:29,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:29" (1/1) ... [2020-08-22 21:50:29,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee7b4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:29, skipping insertion in model container [2020-08-22 21:50:29,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:29" (1/1) ... [2020-08-22 21:50:29,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:50:29,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:50:30,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:30,010 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:50:30,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:30,133 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:50:30,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30 WrapperNode [2020-08-22 21:50:30,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:30,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:50:30,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:50:30,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:50:30,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (1/1) ... [2020-08-22 21:50:30,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (1/1) ... [2020-08-22 21:50:30,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (1/1) ... [2020-08-22 21:50:30,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (1/1) ... [2020-08-22 21:50:30,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (1/1) ... [2020-08-22 21:50:30,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (1/1) ... [2020-08-22 21:50:30,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (1/1) ... [2020-08-22 21:50:30,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:50:30,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:50:30,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:50:30,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:50:30,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (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 21:50:30,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:50:30,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:50:30,245 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-08-22 21:50:30,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-22 21:50:30,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:50:30,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:50:30,246 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-08-22 21:50:30,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 21:50:30,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 21:50:30,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 21:50:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 21:50:30,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 21:50:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 21:50:30,249 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-22 21:50:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:50:30,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:50:30,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:50:30,660 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:50:30,660 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-22 21:50:30,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:30 BoogieIcfgContainer [2020-08-22 21:50:30,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:50:30,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:50:30,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:50:30,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:50:30,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:50:29" (1/3) ... [2020-08-22 21:50:30,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc16d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:30, skipping insertion in model container [2020-08-22 21:50:30,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:30" (2/3) ... [2020-08-22 21:50:30,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc16d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:30, skipping insertion in model container [2020-08-22 21:50:30,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:30" (3/3) ... [2020-08-22 21:50:30,673 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c [2020-08-22 21:50:30,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:50:30,691 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:50:30,702 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:50:30,727 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:50:30,727 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:50:30,728 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:50:30,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:50:30,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:50:30,728 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:50:30,728 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:50:30,728 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:50:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-08-22 21:50:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 21:50:30,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:30,759 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] [2020-08-22 21:50:30,759 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:30,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1005072347, now seen corresponding path program 1 times [2020-08-22 21:50:30,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:30,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980085428] [2020-08-22 21:50:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:30,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:50:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:30,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 21:50:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:30,987 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 21:50:30,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980085428] [2020-08-22 21:50:30,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:50:30,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 21:50:30,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194097492] [2020-08-22 21:50:31,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:50:31,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:50:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:50:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:50:31,023 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 4 states. [2020-08-22 21:50:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:50:31,285 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2020-08-22 21:50:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:50:31,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-08-22 21:50:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:50:31,298 INFO L225 Difference]: With dead ends: 160 [2020-08-22 21:50:31,298 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 21:50:31,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:50:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 21:50:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-22 21:50:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 21:50:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-22 21:50:31,365 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 29 [2020-08-22 21:50:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:50:31,366 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-22 21:50:31,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:50:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-22 21:50:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 21:50:31,368 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:31,369 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 21:50:31,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:50:31,370 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1440108655, now seen corresponding path program 1 times [2020-08-22 21:50:31,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:31,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636929196] [2020-08-22 21:50:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:31,435 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:31,466 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:31,507 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 21:50:31,508 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 21:50:31,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:50:31,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 09:50:31 BoogieIcfgContainer [2020-08-22 21:50:31,577 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 21:50:31,584 INFO L168 Benchmark]: Toolchain (without parser) took 1801.07 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 105.2 MB in the beginning and 101.1 MB in the end (delta: 4.1 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:31,585 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 21:50:31,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.65 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 105.0 MB in the beginning and 183.3 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:31,588 INFO L168 Benchmark]: Boogie Preprocessor took 45.24 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:31,589 INFO L168 Benchmark]: RCFGBuilder took 485.12 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 157.0 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:31,591 INFO L168 Benchmark]: TraceAbstraction took 910.70 ms. Allocated memory is still 204.5 MB. Free memory was 156.3 MB in the beginning and 101.1 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:31,596 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 354.65 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 105.0 MB in the beginning and 183.3 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.24 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 485.12 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 157.0 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 910.70 ms. Allocated memory is still 204.5 MB. Free memory was 156.3 MB in the beginning and 101.1 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 20, overapproximation of someUnaryFLOAToperation at line 62, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L62] float x = -0.0f; [L63] CALL, EXPR trunc_float(x) VAL [\old(x)=4294967300] [L13] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=4294967300, x=4294967300] [L15] ieee_float_shape_type gf_u; VAL [\old(x)=4294967300, gf_u={2:0}, x=4294967300] [L16] gf_u.value = (x) VAL [\old(x)=4294967300, gf_u={2:0}, x=4294967300] [L17] EXPR gf_u.word VAL [\old(x)=4294967300, gf_u={2:0}, gf_u.word=0, x=4294967300] [L17] (w) = gf_u.word VAL [\old(x)=4294967300, gf_u={2:0}, gf_u.word=0, w=0, x=4294967300] [L19] signbit = w & 0x80000000 VAL [\old(x)=4294967300, signbit=-1, w=0, x=4294967300] [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=4294967300, exponent_less_127=255, signbit=-1, w=0, x=4294967300] [L21] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=4294967300, exponent_less_127=255, signbit=-1, w=0, x=4294967300] [L37] COND TRUE exponent_less_127 == 255 VAL [\old(x)=4294967300, exponent_less_127=255, signbit=-1, w=0, x=4294967300] [L38] return x + x; VAL [\old(x)=4294967300, exponent_less_127=255, signbit=-1, w=0, x=4294967300] [L63] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967298, x=4294967300] [L63] float res = trunc_float(x); VAL [res=4294967298, trunc_float(x)=4294967298, x=4294967300] [L66] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=4294967298, res == -0.0f && __signbit_float(res) == 1=0, x=4294967300] [L66] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) VAL [res=4294967298, res == -0.0f && __signbit_float(res) == 1=0, x=4294967300] [L67] __VERIFIER_error() VAL [res=4294967298, x=4294967300] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 87 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 15 SDslu, 59 SDs, 0 SdLazy, 99 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred 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, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 1372 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...