/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_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:00,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:00,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:00,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:06:00,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:06:00,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:06:00,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:06:00,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:06:00,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:06:00,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:06:00,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:06:00,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:06:00,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:00,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:00,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:00,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:00,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:00,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:00,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:00,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:00,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:00,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:00,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:00,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:00,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:06:00,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:06:00,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:06:00,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:06:00,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:06:00,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:06:00,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:06:00,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:06:00,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:06:00,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:06:00,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:06:00,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:06:00,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:06:00,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:06:00,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:00,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:00,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:00,566 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 13:06:00,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:00,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:00,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:00,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:00,604 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:00,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:00,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:00,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:00,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:00,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:00,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:00,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:00,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:00,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:00,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:00,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:00,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:00,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:00,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:00,607 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:00,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:00,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:00,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:00,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:00,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:00,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:00,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:00,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:00,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:00,609 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 13:06:00,894 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:00,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:00,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:00,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:00,912 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:00,913 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-07-20 13:06:00,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3c2848f/9998f8fb506d4650ac1daf9cafdfac2d/FLAG171d5fab2 [2020-07-20 13:06:01,449 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:01,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-07-20 13:06:01,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3c2848f/9998f8fb506d4650ac1daf9cafdfac2d/FLAG171d5fab2 [2020-07-20 13:06:01,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3c2848f/9998f8fb506d4650ac1daf9cafdfac2d [2020-07-20 13:06:01,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:01,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:01,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:01,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:01,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:01,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:01" (1/1) ... [2020-07-20 13:06:01,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c96b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:01, skipping insertion in model container [2020-07-20 13:06:01,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:01" (1/1) ... [2020-07-20 13:06:01,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:01,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:01,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:01,998 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:02,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:02,143 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:02,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02 WrapperNode [2020-07-20 13:06:02,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:02,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:02,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:02,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:02,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ... [2020-07-20 13:06:02,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ... [2020-07-20 13:06:02,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ... [2020-07-20 13:06:02,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ... [2020-07-20 13:06:02,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ... [2020-07-20 13:06:02,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ... [2020-07-20 13:06:02,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ... [2020-07-20 13:06:02,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:02,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:02,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:02,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:02,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (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 13:06:02,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:02,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:02,250 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-20 13:06:02,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-07-20 13:06:02,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:02,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:02,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 13:06:02,250 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-20 13:06:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-07-20 13:06:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 13:06:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 13:06:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:06:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:06:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:06:02,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 13:06:02,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:02,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:02,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:02,651 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:02,652 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 13:06:02,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:02 BoogieIcfgContainer [2020-07-20 13:06:02,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:02,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:02,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:02,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:02,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:01" (1/3) ... [2020-07-20 13:06:02,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e089c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:02, skipping insertion in model container [2020-07-20 13:06:02,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (2/3) ... [2020-07-20 13:06:02,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e089c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:02, skipping insertion in model container [2020-07-20 13:06:02,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:02" (3/3) ... [2020-07-20 13:06:02,665 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2020-07-20 13:06:02,674 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:02,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:02,692 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:02,714 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:02,714 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:02,714 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:02,715 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:02,715 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:02,715 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:02,715 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:02,715 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-07-20 13:06:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:06:02,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:02,745 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 13:06:02,745 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:02,751 INFO L82 PathProgramCache]: Analyzing trace with hash 159633202, now seen corresponding path program 1 times [2020-07-20 13:06:02,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:02,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765835543] [2020-07-20 13:06:02,759 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 13:06:02,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:02,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 13:06:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:02,890 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 13:06:02,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:02,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765835543] [2020-07-20 13:06:02,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:02,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 13:06:02,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985479194] [2020-07-20 13:06:02,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 13:06:02,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:02,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 13:06:02,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:06:02,916 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2020-07-20 13:06:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:02,941 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2020-07-20 13:06:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 13:06:02,943 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 13:06:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:02,956 INFO L225 Difference]: With dead ends: 84 [2020-07-20 13:06:02,956 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 13:06:02,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 13:06:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 13:06:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 13:06:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 13:06:03,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-07-20 13:06:03,001 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 21 [2020-07-20 13:06:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:03,002 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-07-20 13:06:03,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 13:06:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-07-20 13:06:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 13:06:03,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:03,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:03,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:03,218 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:03,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1643831456, now seen corresponding path program 1 times [2020-07-20 13:06:03,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:03,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269355307] [2020-07-20 13:06:03,222 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 13:06:03,298 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:06:03,299 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:06:03,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:03,345 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:06:03,345 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:06:03,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:03,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:06:03 BoogieIcfgContainer [2020-07-20 13:06:03,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:06:03,595 INFO L168 Benchmark]: Toolchain (without parser) took 1814.66 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 104.1 MB in the beginning and 116.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:03,596 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:06:03,597 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.79 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.7 MB in the beginning and 182.0 MB in the end (delta: -78.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:03,598 INFO L168 Benchmark]: Boogie Preprocessor took 44.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:03,598 INFO L168 Benchmark]: RCFGBuilder took 467.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 158.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:03,599 INFO L168 Benchmark]: TraceAbstraction took 933.77 ms. Allocated memory is still 203.9 MB. Free memory was 158.0 MB in the beginning and 116.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:03,603 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 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 362.79 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.7 MB in the beginning and 182.0 MB in the end (delta: -78.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 467.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 158.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 933.77 ms. Allocated memory is still 203.9 MB. Free memory was 158.0 MB in the beginning and 116.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 96]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 13, overapproximation of someBinaryArithmeticFLOAToperation at line 30, overapproximation of bitwiseAnd at line 27. Possible FailurePath: [L15] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [\old(one_sqrt)=0, \old(tiny_sqrt)=2, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L91] float x = 0.0f / 0.0f; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L92] CALL, EXPR __ieee754_sqrtf(x) VAL [\old(x)=6, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L18] float z; [L19] __uint32_t r, hx; [L20] __int32_t ix, s, q, m, t, i; VAL [\old(x)=6, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (ix) = gf_u.word [L27] hx = ix & 0x7fffffff VAL [\old(x)=6, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L29] COND TRUE !((hx) < 0x7f800000L) [L30] return x * x + x; VAL [\old(x)=6, hx=-2155872256, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L92] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=7, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L92] float res = __ieee754_sqrtf(x); [L95] CALL, EXPR isnan_float(res) VAL [\old(x)=7, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L13] return x != x; VAL [\old(x)=7, \result=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=7] [L95] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=7, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L95] COND TRUE !isnan_float(res) [L96] __VERIFIER_error() VAL [one_sqrt=1, res=7, tiny_sqrt=1/1000000000000000000000000000000, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 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: 56 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred 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, 43 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 63 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...