/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_1011a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:50:11,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:50:11,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:50:11,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 21:50:11,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 21:50:11,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 21:50:11,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 21:50:11,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 21:50:11,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 21:50:11,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 21:50:11,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 21:50:11,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 21:50:11,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:50:11,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:50:11,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:50:11,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:50:11,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:50:11,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:50:11,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:50:11,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:50:11,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:50:11,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:50:11,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:50:11,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:50:11,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 21:50:11,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 21:50:11,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 21:50:11,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 21:50:11,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 21:50:11,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 21:50:11,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 21:50:11,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 21:50:11,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 21:50:11,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 21:50:11,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 21:50:11,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 21:50:11,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 21:50:11,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 21:50:11,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:50:11,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:50:11,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:50:11,441 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 21:50:11,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:50:11,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:50:11,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:50:11,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:50:11,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:50:11,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:50:11,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:50:11,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:50:11,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:50:11,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:50:11,461 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:50:11,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:50:11,461 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:50:11,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:50:11,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:50:11,462 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:50:11,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:50:11,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:50:11,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:50:11,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:50:11,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:50:11,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:50:11,463 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 21:50:11,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:50:11,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:50:11,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:50:11,740 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:50:11,741 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:50:11,741 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2020-08-22 21:50:11,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37fdad8f1/551f98e711f54cca8f973bf779553308/FLAG87b5d82a9 [2020-08-22 21:50:12,234 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:50:12,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2020-08-22 21:50:12,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37fdad8f1/551f98e711f54cca8f973bf779553308/FLAG87b5d82a9 [2020-08-22 21:50:12,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37fdad8f1/551f98e711f54cca8f973bf779553308 [2020-08-22 21:50:12,628 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:50:12,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:50:12,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:12,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:50:12,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:50:12,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:12,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbfbc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12, skipping insertion in model container [2020-08-22 21:50:12,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:12,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:50:12,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:50:12,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:12,868 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:50:12,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:50:12,922 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:50:12,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12 WrapperNode [2020-08-22 21:50:12,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:50:12,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:50:12,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:50:12,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:50:13,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:13,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:13,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:13,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:13,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:13,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:13,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (1/1) ... [2020-08-22 21:50:13,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:50:13,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:50:13,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:50:13,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:50:13,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (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 21:50:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:50:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:50:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-08-22 21:50:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-22 21:50:13,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:50:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:50:13,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-22 21:50:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-08-22 21:50:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 21:50:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-22 21:50:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 21:50:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 21:50:13,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 21:50:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-22 21:50:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-22 21:50:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:50:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:50:13,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:50:13,403 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:50:13,403 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-22 21:50:13,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:13 BoogieIcfgContainer [2020-08-22 21:50:13,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:50:13,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:50:13,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:50:13,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:50:13,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:50:12" (1/3) ... [2020-08-22 21:50:13,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dfa8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:13, skipping insertion in model container [2020-08-22 21:50:13,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:50:12" (2/3) ... [2020-08-22 21:50:13,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dfa8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:50:13, skipping insertion in model container [2020-08-22 21:50:13,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:50:13" (3/3) ... [2020-08-22 21:50:13,417 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011a.c [2020-08-22 21:50:13,427 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:50:13,434 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:50:13,448 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:50:13,471 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:50:13,471 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:50:13,471 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:50:13,471 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:50:13,471 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:50:13,472 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:50:13,472 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:50:13,472 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:50:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-08-22 21:50:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 21:50:13,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:13,502 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] [2020-08-22 21:50:13,503 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:13,509 INFO L82 PathProgramCache]: Analyzing trace with hash 461788748, now seen corresponding path program 1 times [2020-08-22 21:50:13,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:13,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976672904] [2020-08-22 21:50:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:13,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:50:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:13,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-22 21:50:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:50:13,717 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 21:50:13,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976672904] [2020-08-22 21:50:13,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:50:13,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 21:50:13,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093249598] [2020-08-22 21:50:13,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:50:13,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:50:13,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:50:13,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:50:13,741 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states. [2020-08-22 21:50:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:50:13,978 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2020-08-22 21:50:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:50:13,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-08-22 21:50:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:50:13,990 INFO L225 Difference]: With dead ends: 126 [2020-08-22 21:50:13,991 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 21:50:13,995 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 21:50:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 21:50:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-08-22 21:50:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 21:50:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-08-22 21:50:14,045 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 24 [2020-08-22 21:50:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:50:14,045 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-08-22 21:50:14,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:50:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-08-22 21:50:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 21:50:14,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:50:14,048 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] [2020-08-22 21:50:14,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:50:14,049 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:50:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:50:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1177663505, now seen corresponding path program 1 times [2020-08-22 21:50:14,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:50:14,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416092304] [2020-08-22 21:50:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:50:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:14,108 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 21:50:14,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 21:50:14,225 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 21:50:14,225 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 21:50:14,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:50:14,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 09:50:14 BoogieIcfgContainer [2020-08-22 21:50:14,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 21:50:14,266 INFO L168 Benchmark]: Toolchain (without parser) took 1635.32 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 104.7 MB in the beginning and 110.4 MB in the end (delta: -5.7 MB). Peak memory consumption was 57.2 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:14,267 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 21:50:14,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.01 ms. Allocated memory is still 140.5 MB. Free memory was 104.7 MB in the beginning and 94.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:14,269 INFO L168 Benchmark]: Boogie Preprocessor took 120.52 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.1 MB in the beginning and 180.8 MB in the end (delta: -86.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:14,270 INFO L168 Benchmark]: RCFGBuilder took 364.57 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 160.1 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:14,271 INFO L168 Benchmark]: TraceAbstraction took 853.45 ms. Allocated memory is still 203.4 MB. Free memory was 159.2 MB in the beginning and 110.4 MB in the end (delta: 48.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2020-08-22 21:50:14,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.01 ms. Allocated memory is still 140.5 MB. Free memory was 104.7 MB in the beginning and 94.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.52 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 94.1 MB in the beginning and 180.8 MB in the end (delta: -86.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.57 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 160.1 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 853.45 ms. Allocated memory is still 203.4 MB. Free memory was 159.2 MB in the beginning and 110.4 MB in the end (delta: 48.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 50]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of bitwiseAnd at line 21. Possible FailurePath: [L45] float x = 0.0f; VAL [x=0] [L46] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L13] __uint32_t ix; VAL [\old(x)=0, x=0] [L15] ieee_float_shape_type gf_u; VAL [\old(x)=0, gf_u={3:0}, x=0] [L16] gf_u.value = (x) VAL [\old(x)=0, gf_u={3:0}, x=0] [L17] EXPR gf_u.word VAL [\old(x)=0, gf_u={3:0}, gf_u.word=5, x=0] [L17] (ix) = gf_u.word VAL [\old(x)=0, gf_u={3:0}, gf_u.word=5, ix=5, x=0] [L20] ieee_float_shape_type sf_u; VAL [\old(x)=0, ix=5, sf_u={2:0}, x=0] [L21] sf_u.word = (ix & 0x7fffffff) VAL [\old(x)=0, ix=5, sf_u={2:0}, x=0] [L22] EXPR sf_u.value VAL [\old(x)=0, ix=5, sf_u={2:0}, sf_u.value=11, x=0] [L22] (x) = sf_u.value VAL [(x) = sf_u.value=7, \old(x)=0, ix=5, sf_u={2:0}, sf_u.value=11, x=11] [L24] return x; VAL [\old(x)=0, \result=11, ix=5, x=11] [L46] RET, EXPR fabs_float(x) VAL [fabs_float(x)=11, x=0] [L46] float res = fabs_float(x); VAL [fabs_float(x)=11, res=11, x=0] [L49] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=11, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L49] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) VAL [res=11, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L50] __VERIFIER_error() VAL [res=11, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 69 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: 65 SDtfs, 11 SDslu, 45 SDs, 0 SdLazy, 75 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=69occurred 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, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 1012 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...