/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:55:39,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:55:39,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:55:39,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:55:39,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:55:39,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:55:39,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:55:39,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:55:39,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:55:39,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:55:39,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:55:39,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:55:39,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:55:39,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:55:39,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:55:39,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:55:39,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:55:39,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:55:39,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:55:39,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:55:39,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:55:39,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:55:39,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:55:39,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:55:39,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:55:39,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:55:39,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:55:39,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:55:39,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:55:39,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:55:39,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:55:39,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:55:39,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:55:39,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:55:39,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:55:39,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:55:39,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:55:39,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:55:39,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:55:39,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:55:39,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:55:39,637 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 12:55:39,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:55:39,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:55:39,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:55:39,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:55:39,671 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:55:39,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:55:39,671 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:55:39,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:55:39,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:55:39,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:55:39,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:55:39,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:55:39,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:55:39,673 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:55:39,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:55:39,673 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:55:39,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:55:39,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:55:39,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:55:39,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:55:39,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:55:39,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:55:39,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:55:39,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:55:39,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:55:39,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:55:39,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:39,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:55:39,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:55:39,676 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 -> 2 [2020-07-21 12:55:40,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:55:40,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:55:40,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:55:40,039 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:55:40,039 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:55:40,041 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2020-07-21 12:55:40,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3a635c1/db21a4a5c8d64c38a8ff39a291070c51/FLAGa8335ff9f [2020-07-21 12:55:40,618 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:55:40,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2020-07-21 12:55:40,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3a635c1/db21a4a5c8d64c38a8ff39a291070c51/FLAGa8335ff9f [2020-07-21 12:55:41,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3a635c1/db21a4a5c8d64c38a8ff39a291070c51 [2020-07-21 12:55:41,038 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:55:41,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:55:41,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:55:41,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:55:41,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:55:41,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ecad081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41, skipping insertion in model container [2020-07-21 12:55:41,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:55:41,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:55:41,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:55:41,278 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:55:41,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:55:41,404 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:55:41,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41 WrapperNode [2020-07-21 12:55:41,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:55:41,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:55:41,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:55:41,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:55:41,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (1/1) ... [2020-07-21 12:55:41,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:55:41,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:55:41,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:55:41,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:55:41,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (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 12:55:41,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:55:41,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:55:41,514 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-07-21 12:55:41,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-21 12:55:41,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:55:41,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:55:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-07-21 12:55:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 12:55:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 12:55:41,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 12:55:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 12:55:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 12:55:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 12:55:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-21 12:55:41,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:55:41,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:55:41,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:55:41,876 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:55:41,876 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-07-21 12:55:41,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:55:41 BoogieIcfgContainer [2020-07-21 12:55:41,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:55:41,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:55:41,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:55:41,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:55:41,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:55:41" (1/3) ... [2020-07-21 12:55:41,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dda561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:55:41, skipping insertion in model container [2020-07-21 12:55:41,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:55:41" (2/3) ... [2020-07-21 12:55:41,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dda561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:55:41, skipping insertion in model container [2020-07-21 12:55:41,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:55:41" (3/3) ... [2020-07-21 12:55:41,888 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072c.c [2020-07-21 12:55:41,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:55:41,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:55:41,917 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:55:41,937 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:55:41,937 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:55:41,937 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:55:41,937 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:55:41,937 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:55:41,937 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:55:41,937 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:55:41,938 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:55:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 12:55:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 12:55:41,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:41,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:55:41,962 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:41,967 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times [2020-07-21 12:55:41,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:41,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207945301] [2020-07-21 12:55:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 12:55:42,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:55:42,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:55:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 12:55:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:55:42,096 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 12:55:42,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:55:42,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207945301] [2020-07-21 12:55:42,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:55:42,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 12:55:42,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065901592] [2020-07-21 12:55:42,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 12:55:42,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:55:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 12:55:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:55:42,117 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-07-21 12:55:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:55:42,142 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-07-21 12:55:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:55:42,144 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-07-21 12:55:42,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:55:42,151 INFO L225 Difference]: With dead ends: 68 [2020-07-21 12:55:42,152 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 12:55:42,155 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 [2020-07-21 12:55:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 12:55:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-21 12:55:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 12:55:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-21 12:55:42,197 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2020-07-21 12:55:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:55:42,197 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-21 12:55:42,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 12:55:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-21 12:55:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 12:55:42,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:55:42,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:55:42,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:42,413 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:55:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:55:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times [2020-07-21 12:55:42,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:55:42,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067248411] [2020-07-21 12:55:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 12:55:42,486 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:55:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 12:55:42,487 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 12:55:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 12:55:42,506 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 12:55:42,527 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 12:55:42,527 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 12:55:42,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:55:42,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:55:42 BoogieIcfgContainer [2020-07-21 12:55:42,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:55:42,777 INFO L168 Benchmark]: Toolchain (without parser) took 1736.39 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 117.3 MB in the end (delta: -16.4 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:55:42,781 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 12:55:42,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.29 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 100.5 MB in the beginning and 178.7 MB in the end (delta: -78.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-07-21 12:55:42,784 INFO L168 Benchmark]: Boogie Preprocessor took 48.21 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 176.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-21 12:55:42,785 INFO L168 Benchmark]: RCFGBuilder took 425.85 ms. Allocated memory is still 199.8 MB. Free memory was 176.3 MB in the beginning and 156.6 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-07-21 12:55:42,787 INFO L168 Benchmark]: TraceAbstraction took 892.58 ms. Allocated memory is still 199.8 MB. Free memory was 155.9 MB in the beginning and 117.3 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:55:42,794 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.29 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 100.5 MB in the beginning and 178.7 MB in the end (delta: -78.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.21 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 176.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.85 ms. Allocated memory is still 199.8 MB. Free memory was 176.3 MB in the beginning and 156.6 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 892.58 ms. Allocated memory is still 199.8 MB. Free memory was 155.9 MB in the beginning and 117.3 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 19, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L62] float x = 0.0f; VAL [x=0] [L63] CALL, EXPR trunc_float(x) VAL [\old(x)=0] [L13] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=0, x=0] [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (w) = gf_u.word [L19] signbit = w & 0x80000000 [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=0, exponent_less_127=255, signbit=8855, w=2147483647, x=0] [L21] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=0, exponent_less_127=255, signbit=8855, w=2147483647, x=0] [L37] COND TRUE exponent_less_127 == 255 [L38] return x + x; VAL [\old(x)=0, exponent_less_127=255, signbit=8855, w=2147483647, x=0] [L63] RET, EXPR trunc_float(x) VAL [trunc_float(x)=2, x=0] [L63] float res = trunc_float(x); [L66] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=2, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L66] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L67] __VERIFIER_error() VAL [res=2, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 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: 41 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=38occurred 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, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 60 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...