/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:44:57,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:44:57,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:44:57,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:44:57,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:44:57,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:44:57,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:44:57,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:44:57,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:44:57,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:44:57,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:44:57,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:44:57,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:44:57,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:44:57,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:44:57,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:44:57,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:44:57,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:44:57,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:44:57,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:44:57,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:44:57,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:44:57,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:44:57,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:44:57,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:44:57,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:44:57,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:44:57,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:44:57,295 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 10:44:57,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:44:57,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:44:57,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:44:57,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:44:57,317 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:44:57,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:44:57,317 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:44:57,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:44:57,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:44:57,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:44:57,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:44:57,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:44:57,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:44:57,319 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:44:57,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:44:57,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:44:57,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:44:57,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:44:57,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:44:57,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:44:57,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:44:57,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:44:57,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:44:57,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:44:57,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:44:57,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:44:57,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:44:57,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:44:57,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:44:57,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:44:57,617 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:44:57,638 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:44:57,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:44:57,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:44:57,643 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:44:57,643 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2020-07-20 10:44:57,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731732430/5b9e0b32c2a94d379b9a1f5384216597/FLAG9a18c5a5d [2020-07-20 10:44:58,153 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:44:58,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1011b.c [2020-07-20 10:44:58,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731732430/5b9e0b32c2a94d379b9a1f5384216597/FLAG9a18c5a5d [2020-07-20 10:44:58,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731732430/5b9e0b32c2a94d379b9a1f5384216597 [2020-07-20 10:44:58,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:44:58,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:44:58,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:44:58,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:44:58,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:44:58,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c97e938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58, skipping insertion in model container [2020-07-20 10:44:58,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:44:58,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:44:58,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:44:58,746 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:44:58,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:44:58,793 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:44:58,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58 WrapperNode [2020-07-20 10:44:58,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:44:58,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:44:58,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:44:58,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:44:58,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (1/1) ... [2020-07-20 10:44:58,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:44:58,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:44:58,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:44:58,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:44:58,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (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 10:44:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:44:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:44:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-07-20 10:44:59,008 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_double [2020-07-20 10:44:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:44:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:44:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-07-20 10:44:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:44:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:44:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:44:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:44:59,010 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_double [2020-07-20 10:44:59,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:44:59,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:44:59,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:44:59,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:44:59,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:44:59,318 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:44:59,319 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 10:44:59,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:44:59 BoogieIcfgContainer [2020-07-20 10:44:59,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:44:59,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:44:59,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:44:59,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:44:59,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:44:58" (1/3) ... [2020-07-20 10:44:59,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f43cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:44:59, skipping insertion in model container [2020-07-20 10:44:59,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:44:58" (2/3) ... [2020-07-20 10:44:59,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f43cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:44:59, skipping insertion in model container [2020-07-20 10:44:59,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:44:59" (3/3) ... [2020-07-20 10:44:59,330 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1011b.c [2020-07-20 10:44:59,339 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:44:59,346 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:44:59,359 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:44:59,380 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:44:59,381 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:44:59,381 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:44:59,381 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:44:59,381 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:44:59,381 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:44:59,381 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:44:59,381 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:44:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 10:44:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 10:44:59,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:44:59,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:44:59,407 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:44:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:44:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2010282984, now seen corresponding path program 1 times [2020-07-20 10:44:59,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:44:59,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272783310] [2020-07-20 10:44:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:44:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:44:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:44:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:44:59,554 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 10:44:59,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:44:59,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272783310] [2020-07-20 10:44:59,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:44:59,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:44:59,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965001027] [2020-07-20 10:44:59,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:44:59,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:44:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:44:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:44:59,578 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-20 10:44:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:44:59,605 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-20 10:44:59,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:44:59,606 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-20 10:44:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:44:59,615 INFO L225 Difference]: With dead ends: 56 [2020-07-20 10:44:59,615 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 10:44:59,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 10:44:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 10:44:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 10:44:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 10:44:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-07-20 10:44:59,659 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 17 [2020-07-20 10:44:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:44:59,660 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-07-20 10:44:59,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:44:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-07-20 10:44:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 10:44:59,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:44:59,662 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 10:44:59,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:44:59,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:44:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:44:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1410255941, now seen corresponding path program 1 times [2020-07-20 10:44:59,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:44:59,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282603030] [2020-07-20 10:44:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:44:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:44:59,935 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:44:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:44:59,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:44:59,977 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:44:59,977 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:00,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:00,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:00 BoogieIcfgContainer [2020-07-20 10:45:00,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:00,224 INFO L168 Benchmark]: Toolchain (without parser) took 1693.33 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 101.3 MB in the beginning and 125.3 MB in the end (delta: -24.0 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,225 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.12 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,227 INFO L168 Benchmark]: Boogie Preprocessor took 158.94 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.3 MB in the beginning and 179.8 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,228 INFO L168 Benchmark]: RCFGBuilder took 368.80 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,229 INFO L168 Benchmark]: TraceAbstraction took 898.34 ms. Allocated memory is still 202.4 MB. Free memory was 161.5 MB in the beginning and 125.3 MB in the end (delta: 36.1 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:00,233 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.12 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.94 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.3 MB in the beginning and 179.8 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.80 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 898.34 ms. Allocated memory is still 202.4 MB. Free memory was 161.5 MB in the beginning and 125.3 MB in the end (delta: 36.1 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 52]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 51, overapproximation of someUnaryDOUBLEoperation at line 47, overapproximation of bitwiseAnd at line 35. Possible FailurePath: [L47] double x = -0.0; [L48] CALL, EXPR fabs_double(x) VAL [\old(x)=3] [L26] __uint32_t high; VAL [\old(x)=3, x=3] [L28] ieee_double_shape_type gh_u; [L29] gh_u.value = (x) [L30] EXPR gh_u.parts.msw [L30] (high) = gh_u.parts.msw [L33] ieee_double_shape_type sh_u; [L34] sh_u.value = (x) [L35] sh_u.parts.msw = (high & 0x7fffffff) [L36] EXPR sh_u.value [L36] (x) = sh_u.value [L38] return x; VAL [\old(x)=3, \result=3, high=7, x=3] [L48] RET, EXPR fabs_double(x) VAL [fabs_double(x)=3, x=3] [L48] double res = fabs_double(x); [L51] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=3, res == 0.0 && __signbit_double(res) == 0=0, x=3] [L51] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L52] __VERIFIER_error() VAL [res=3, x=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 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: 32 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 256 SizeOfPredicates, 0 NumberOfNonLiveVariables, 55 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...