/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 DAGSIZE --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_1052c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:07:43,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:07:43,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:07:43,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:07:43,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:07:43,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:07:43,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:07:43,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:07:43,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:07:43,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:07:43,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:07:43,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:07:43,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:07:43,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:07:43,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:07:43,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:07:43,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:07:43,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:07:43,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:07:43,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:07:43,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:07:43,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:07:43,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:07:43,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:07:43,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:07:43,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 21:07:43,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 21:07:43,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 21:07:43,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 21:07:43,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 21:07:43,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 21:07:43,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 21:07:43,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 21:07:43,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:07:43,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:07:43,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:07:43,423 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 21:07:43,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:07:43,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:07:43,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:07:43,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:07:43,444 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:07:43,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:07:43,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:07:43,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:07:43,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:07:43,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:07:43,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:07:43,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:07:43,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:07:43,446 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:07:43,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:07:43,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:07:43,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:07:43,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:07:43,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:07:43,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:07:43,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:07:43,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:07:43,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:07:43,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:07:43,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:07:43,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:07:43,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:43,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:07:43,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:07:43,449 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 -> DAGSIZE 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 21:07:43,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:07:43,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:07:43,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:07:43,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:07:43,725 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:07:43,726 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-07-20 21:07:43,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/688e71125/630549fb4f944befa5cdcc7905b70b11/FLAG06c161517 [2020-07-20 21:07:44,206 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:07:44,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-07-20 21:07:44,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/688e71125/630549fb4f944befa5cdcc7905b70b11/FLAG06c161517 [2020-07-20 21:07:44,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/688e71125/630549fb4f944befa5cdcc7905b70b11 [2020-07-20 21:07:44,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:07:44,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:07:44,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:44,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:07:44,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:07:44,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:44,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c01a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44, skipping insertion in model container [2020-07-20 21:07:44,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:44,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:07:44,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:07:44,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:44,836 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:07:44,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:44,969 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:07:44,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44 WrapperNode [2020-07-20 21:07:44,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:44,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:07:44,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:07:44,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:07:44,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:44,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:44,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:44,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:45,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:45,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:45,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (1/1) ... [2020-07-20 21:07:45,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:07:45,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:07:45,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:07:45,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:07:45,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (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 21:07:45,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:07:45,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:07:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-07-20 21:07:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 21:07:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:07:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:07:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-07-20 21:07:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:07:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 21:07:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:07:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:07:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:07:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 21:07:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 21:07:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:07:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:07:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:07:45,567 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:07:45,567 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 21:07:45,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:45 BoogieIcfgContainer [2020-07-20 21:07:45,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:07:45,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:07:45,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:07:45,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:07:45,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:07:44" (1/3) ... [2020-07-20 21:07:45,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ee4495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:45, skipping insertion in model container [2020-07-20 21:07:45,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:44" (2/3) ... [2020-07-20 21:07:45,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ee4495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:45, skipping insertion in model container [2020-07-20 21:07:45,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:45" (3/3) ... [2020-07-20 21:07:45,581 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052c.c [2020-07-20 21:07:45,593 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:07:45,602 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:07:45,618 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:07:45,644 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:07:45,645 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:07:45,645 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:07:45,645 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:07:45,645 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:07:45,646 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:07:45,646 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:07:45,646 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:07:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-20 21:07:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:07:45,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:45,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:07:45,676 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2053199230, now seen corresponding path program 1 times [2020-07-20 21:07:45,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:45,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652582317] [2020-07-20 21:07:45,693 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 21:07:45,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:07:45,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:07:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 21:07:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:07:45,825 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 21:07:45,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:07:45,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652582317] [2020-07-20 21:07:45,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:07:45,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 21:07:45,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591316416] [2020-07-20 21:07:45,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 21:07:45,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:07:45,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 21:07:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:07:45,855 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-20 21:07:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:07:45,885 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-07-20 21:07:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 21:07:45,887 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-20 21:07:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:07:45,898 INFO L225 Difference]: With dead ends: 78 [2020-07-20 21:07:45,898 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 21:07:45,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 21:07:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 21:07:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 21:07:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 21:07:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-07-20 21:07:45,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-07-20 21:07:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:07:45,950 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-07-20 21:07:45,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 21:07:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-07-20 21:07:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:07:45,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:45,952 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 21:07:46,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:46,167 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2027240245, now seen corresponding path program 1 times [2020-07-20 21:07:46,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:46,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129976009] [2020-07-20 21:07:46,171 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 21:07:46,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:07:46,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:07:46,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:07:46,267 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:46,309 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:07:46,310 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:07:46,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:46,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:07:46 BoogieIcfgContainer [2020-07-20 21:07:46,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:07:46,561 INFO L168 Benchmark]: Toolchain (without parser) took 1943.57 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 104.4 MB in the beginning and 119.5 MB in the end (delta: -15.1 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:46,562 INFO L168 Benchmark]: CDTParser took 0.21 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:07:46,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.96 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 104.0 MB in the beginning and 182.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:46,564 INFO L168 Benchmark]: Boogie Preprocessor took 50.50 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:46,565 INFO L168 Benchmark]: RCFGBuilder took 550.57 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 159.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:46,566 INFO L168 Benchmark]: TraceAbstraction took 984.97 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 119.5 MB in the end (delta: 39.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:46,570 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 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 350.96 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 104.0 MB in the beginning and 182.4 MB in the end (delta: -78.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.50 ms. Allocated memory is still 203.4 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 550.57 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 159.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 984.97 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 119.5 MB in the end (delta: 39.2 MB). Peak memory consumption was 39.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 21, overapproximation of someUnaryFLOAToperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L11] static const float huge_floor = 1.0e30; VAL [\old(huge_floor)=0, huge_floor=1000000000000000000000000000000] [L75] float x = -0.0f; VAL [huge_floor=1000000000000000000000000000000] [L76] CALL, EXPR floor_float(x) VAL [\old(x)=4, huge_floor=1000000000000000000000000000000] [L14] __int32_t i0, j0; [L15] __uint32_t i, ix; VAL [\old(x)=4, huge_floor=1000000000000000000000000000000, x=4] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] ix = (i0 & 0x7fffffff) [L22] j0 = (ix >> 23) - 0x7f VAL [\old(x)=4, huge_floor=1000000000000000000000000000000, i=-72057591898832896, i0=32285, j0=128, x=4] [L23] COND FALSE !(j0 < 23) VAL [\old(x)=4, huge_floor=1000000000000000000000000000000, i=-72057591898832896, i0=32285, j0=128, x=4] [L43] COND TRUE !((ix) < 0x7f800000L) [L44] return x + x; VAL [\old(x)=4, huge_floor=1000000000000000000000000000000, i=-72057591898832896, i0=32285, j0=128, x=4] [L76] RET, EXPR floor_float(x) VAL [floor_float(x)=5, huge_floor=1000000000000000000000000000000, x=4] [L76] float res = floor_float(x); [L79] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [huge_floor=1000000000000000000000000000000, res=5, res == -0.0f && __signbit_float(res) == 1=0, x=4] [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() VAL [huge_floor=1000000000000000000000000000000, res=5, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 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: 52 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 62 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...