/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:17,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:17,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:17,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:17,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:17,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:17,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:17,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:17,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:17,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:17,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:17,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:17,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:17,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:17,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:17,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:17,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:17,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:17,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:17,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:17,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:17,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:17,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:17,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:17,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:17,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:17,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:17,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:17,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:40:17,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:17,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:17,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:17,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:17,541 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:17,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:17,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:17,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:17,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:17,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:17,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:17,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:17,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:17,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:17,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:17,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:17,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:17,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:17,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:17,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:17,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:17,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:17,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:17,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:17,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:17,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:17,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:17,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:17,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:17,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:40:17,832 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:17,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:17,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:17,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:17,850 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:17,850 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-07-21 10:40:17,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/813456906/a411b0b0845344fd9ceb89495765458c/FLAGfc4a9361f [2020-07-21 10:40:18,311 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:18,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2020-07-21 10:40:18,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/813456906/a411b0b0845344fd9ceb89495765458c/FLAGfc4a9361f [2020-07-21 10:40:18,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/813456906/a411b0b0845344fd9ceb89495765458c [2020-07-21 10:40:18,693 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:18,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:18,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:18,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:18,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:18,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:18" (1/1) ... [2020-07-21 10:40:18,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798c2c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:18, skipping insertion in model container [2020-07-21 10:40:18,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:18" (1/1) ... [2020-07-21 10:40:18,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:18,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:18,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:18,970 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:18,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:19,013 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:19,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19 WrapperNode [2020-07-21 10:40:19,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:19,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:19,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:19,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:19,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (1/1) ... [2020-07-21 10:40:19,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (1/1) ... [2020-07-21 10:40:19,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (1/1) ... [2020-07-21 10:40:19,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (1/1) ... [2020-07-21 10:40:19,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (1/1) ... [2020-07-21 10:40:19,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (1/1) ... [2020-07-21 10:40:19,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (1/1) ... [2020-07-21 10:40:19,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:19,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:19,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:19,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:19,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (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 [2020-07-21 10:40:19,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:19,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:19,204 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2020-07-21 10:40:19,204 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-21 10:40:19,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 10:40:19,206 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2020-07-21 10:40:19,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 10:40:19,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 10:40:19,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 10:40:19,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 10:40:19,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 10:40:19,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 10:40:19,207 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-21 10:40:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:19,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:19,455 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:19,456 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-21 10:40:19,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:19 BoogieIcfgContainer [2020-07-21 10:40:19,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:19,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:19,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:19,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:19,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:18" (1/3) ... [2020-07-21 10:40:19,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44734a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:19, skipping insertion in model container [2020-07-21 10:40:19,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:19" (2/3) ... [2020-07-21 10:40:19,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44734a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:19, skipping insertion in model container [2020-07-21 10:40:19,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:19" (3/3) ... [2020-07-21 10:40:19,468 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2020-07-21 10:40:19,482 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:19,492 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:19,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:19,542 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:19,543 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:19,543 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:19,543 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:19,543 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:19,544 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:19,544 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:19,544 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-21 10:40:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 10:40:19,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:19,576 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] [2020-07-21 10:40:19,576 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:19,584 INFO L82 PathProgramCache]: Analyzing trace with hash 247190453, now seen corresponding path program 1 times [2020-07-21 10:40:19,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:19,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708107128] [2020-07-21 10:40:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 10:40:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:40:19,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:19,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708107128] [2020-07-21 10:40:19,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:19,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 10:40:19,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681783424] [2020-07-21 10:40:19,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 10:40:19,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 10:40:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:40:19,742 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-21 10:40:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:19,763 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-07-21 10:40:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 10:40:19,765 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 10:40:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:19,773 INFO L225 Difference]: With dead ends: 52 [2020-07-21 10:40:19,773 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 10:40:19,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:40:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 10:40:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 10:40:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:40:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 25 transitions. [2020-07-21 10:40:19,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 25 transitions. Word has length 22 [2020-07-21 10:40:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:19,818 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 25 transitions. [2020-07-21 10:40:19,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 10:40:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 25 transitions. [2020-07-21 10:40:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 10:40:19,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:19,820 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] [2020-07-21 10:40:20,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:20,036 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash 730707327, now seen corresponding path program 1 times [2020-07-21 10:40:20,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:20,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535396739] [2020-07-21 10:40:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:20,148 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:20,173 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:20,202 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:20,203 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:20,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:20,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:20 BoogieIcfgContainer [2020-07-21 10:40:20,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:20,453 INFO L168 Benchmark]: Toolchain (without parser) took 1757.53 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 100.9 MB in the beginning and 121.8 MB in the end (delta: -20.9 MB). Peak memory consumption was 36.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:20,454 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:20,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.71 ms. Allocated memory is still 144.7 MB. Free memory was 100.4 MB in the beginning and 90.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:20,456 INFO L168 Benchmark]: Boogie Preprocessor took 123.91 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.0 MB in the beginning and 179.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:20,457 INFO L168 Benchmark]: RCFGBuilder took 315.10 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:20,458 INFO L168 Benchmark]: TraceAbstraction took 989.53 ms. Allocated memory is still 201.9 MB. Free memory was 161.4 MB in the beginning and 121.8 MB in the end (delta: 39.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:20,463 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 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.71 ms. Allocated memory is still 144.7 MB. Free memory was 100.4 MB in the beginning and 90.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.91 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 90.0 MB in the beginning and 179.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.10 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 989.53 ms. Allocated memory is still 201.9 MB. Free memory was 161.4 MB in the beginning and 121.8 MB in the end (delta: 39.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 49]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 33, overapproximation of bitwiseOr at line 26, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L43] float x = 0.0f / 0.0f; [L44] float y = __VERIFIER_nondet_float(); [L45] CALL, EXPR copysign_float(x, y) VAL [\old(x)=10, \old(y)=9] [L13] __uint32_t ix, iy; VAL [\old(x)=10, \old(y)=9, x=10, y=9] [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (ix) = gf_u.word [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (y) [L22] EXPR gf_u.word [L22] (iy) = gf_u.word [L25] ieee_float_shape_type sf_u; [L26] sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000)) [L27] EXPR sf_u.value [L27] (x) = sf_u.value [L29] return x; VAL [\old(x)=10, \old(y)=9, \result=1, ix=11, iy=13, x=1, y=9] [L45] RET, EXPR copysign_float(x, y) VAL [copysign_float(x, y)=1, x=10, y=9] [L45] float res = copysign_float(x, y); [L48] CALL, EXPR isnan_float(res) VAL [\old(x)=1] [L33] return x != x; VAL [\old(x)=1, \result=0, x=1] [L48] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=1, x=10, y=9] [L48] COND TRUE !isnan_float(res) [L49] __VERIFIER_error() VAL [res=1, x=10, y=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 0.0s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 1 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...