/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:14,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:14,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:14,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:06:14,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:06:14,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:06:14,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:06:14,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:06:14,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:06:14,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:06:14,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:06:14,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:06:14,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:14,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:14,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:14,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:14,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:14,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:14,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:14,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:14,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:14,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:14,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:14,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:14,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:06:14,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:06:14,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:06:14,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:06:14,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:06:14,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:06:14,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:06:14,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:06:14,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:06:14,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:06:14,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:06:14,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:06:14,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:06:14,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:06:14,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:14,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:14,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:14,402 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 [2020-07-20 13:06:14,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:14,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:14,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:14,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:14,432 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:14,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:14,432 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:14,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:14,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:14,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:14,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:14,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:14,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:14,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:14,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:14,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:14,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:14,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:14,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:14,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:14,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:14,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:14,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:14,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:14,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:14,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:14,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:14,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:14,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:14,442 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:06:14,718 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:14,738 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:14,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:14,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:14,743 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:14,745 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-20 13:06:14,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306a0d332/06eb48d4c90740b685f9c99d14285b70/FLAGa067a132c [2020-07-20 13:06:15,265 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:15,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-20 13:06:15,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306a0d332/06eb48d4c90740b685f9c99d14285b70/FLAGa067a132c [2020-07-20 13:06:15,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/306a0d332/06eb48d4c90740b685f9c99d14285b70 [2020-07-20 13:06:15,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:15,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:15,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:15,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:15,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:15,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:15" (1/1) ... [2020-07-20 13:06:15,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2f916a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:15, skipping insertion in model container [2020-07-20 13:06:15,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:15" (1/1) ... [2020-07-20 13:06:15,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:15,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:15,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:15,871 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:16,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:16,038 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:16,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16 WrapperNode [2020-07-20 13:06:16,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:16,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:16,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:16,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:16,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (1/1) ... [2020-07-20 13:06:16,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (1/1) ... [2020-07-20 13:06:16,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (1/1) ... [2020-07-20 13:06:16,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (1/1) ... [2020-07-20 13:06:16,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (1/1) ... [2020-07-20 13:06:16,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (1/1) ... [2020-07-20 13:06:16,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (1/1) ... [2020-07-20 13:06:16,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:16,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:16,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:16,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:16,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (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 [2020-07-20 13:06:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-20 13:06:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 13:06:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:16,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:16,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 13:06:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-20 13:06:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 13:06:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 13:06:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:06:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:06:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 13:06:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:06:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 13:06:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-20 13:06:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:16,640 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:16,640 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-20 13:06:16,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:16 BoogieIcfgContainer [2020-07-20 13:06:16,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:16,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:16,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:16,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:16,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:15" (1/3) ... [2020-07-20 13:06:16,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc97b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:16, skipping insertion in model container [2020-07-20 13:06:16,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:16" (2/3) ... [2020-07-20 13:06:16,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc97b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:16, skipping insertion in model container [2020-07-20 13:06:16,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:16" (3/3) ... [2020-07-20 13:06:16,657 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-07-20 13:06:16,669 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:16,678 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:16,693 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:16,721 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:16,721 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:16,721 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:16,721 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:16,721 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:16,722 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:16,722 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:16,722 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-20 13:06:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:06:16,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:16,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:16,754 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:16,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-07-20 13:06:16,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:16,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669005825] [2020-07-20 13:06:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:06:16,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:06:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:16,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 13:06:16,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:16,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:16,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669005825] [2020-07-20 13:06:16,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:16,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 13:06:16,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491391386] [2020-07-20 13:06:16,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 13:06:16,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:16,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 13:06:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:06:16,948 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-07-20 13:06:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:16,981 INFO L93 Difference]: Finished difference Result 113 states and 177 transitions. [2020-07-20 13:06:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 13:06:16,982 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-20 13:06:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:16,994 INFO L225 Difference]: With dead ends: 113 [2020-07-20 13:06:16,994 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 13:06:16,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:06:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 13:06:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 13:06:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 13:06:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-20 13:06:17,044 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-07-20 13:06:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:17,044 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-20 13:06:17,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 13:06:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-20 13:06:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:06:17,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:17,046 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] [2020-07-20 13:06:17,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:17,261 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-07-20 13:06:17,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:17,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042009918] [2020-07-20 13:06:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 [2020-07-20 13:06:17,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:17,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:06:17,390 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:06:17,427 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:17,476 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:06:17,477 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:06:17,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:17,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:06:17 BoogieIcfgContainer [2020-07-20 13:06:17,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:06:17,745 INFO L168 Benchmark]: Toolchain (without parser) took 2136.18 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 103.5 MB in the beginning and 102.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 66.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:17,746 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 13:06:17,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.74 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 103.1 MB in the beginning and 180.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:17,748 INFO L168 Benchmark]: Boogie Preprocessor took 61.05 ms. Allocated memory is still 203.9 MB. Free memory was 180.8 MB in the beginning and 178.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:17,749 INFO L168 Benchmark]: RCFGBuilder took 544.32 ms. Allocated memory is still 203.9 MB. Free memory was 178.2 MB in the beginning and 149.5 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:17,750 INFO L168 Benchmark]: TraceAbstraction took 1096.81 ms. Allocated memory is still 203.9 MB. Free memory was 148.8 MB in the beginning and 102.0 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:17,755 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 428.74 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 103.1 MB in the beginning and 180.8 MB in the end (delta: -77.7 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.05 ms. Allocated memory is still 203.9 MB. Free memory was 180.8 MB in the beginning and 178.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 544.32 ms. Allocated memory is still 203.9 MB. Free memory was 178.2 MB in the beginning and 149.5 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1096.81 ms. Allocated memory is still 203.9 MB. Free memory was 148.8 MB in the beginning and 102.0 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; VAL [\old(one_fmod)=2, \old(Zero_fmod)=9, \old(Zero_fmod)=6, one_fmod=1, Zero_fmod={4:0}] [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) VAL [one_fmod=1, x=0, y=9, Zero_fmod={4:0}] [L131] CALL, EXPR fmod_float(x, y) VAL [\old(x)=0, \old(y)=9, one_fmod=1, Zero_fmod={4:0}] [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; VAL [\old(x)=0, \old(y)=9, one_fmod=1, x=0, y=9, Zero_fmod={4:0}] [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff VAL [\old(x)=0, \old(y)=9, one_fmod=1, sx=11797, x=0, y=9, Zero_fmod={4:0}] [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); VAL [\old(x)=0, \old(y)=9, hx=0, hy=2139095041, one_fmod=1, sx=11797, x=0, y=9, Zero_fmod={4:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=10, one_fmod=1, x=0, y=9, Zero_fmod={4:0}] [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [one_fmod=1, res=10, res == 0.0f && __signbit_float(res) == 0=0, x=0, y=9, Zero_fmod={4:0}] [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() VAL [one_fmod=1, res=10, x=0, y=9, Zero_fmod={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 40 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 84 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...