/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/float_req_bl_1211b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:13,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:13,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:13,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:13,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:13,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:13,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:13,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:13,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:13,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:13,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:13,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:13,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:13,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:13,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:13,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:13,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:13,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:13,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:13,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:13,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:13,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:13,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:13,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:13,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:13,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:13,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:13,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:13,795 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 10:40:13,827 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:13,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:13,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:13,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:13,828 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:13,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:13,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:13,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:13,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:13,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:13,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:13,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:13,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:13,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:13,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:13,830 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:13,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:13,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:13,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:13,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:13,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:13,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:13,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:13,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:13,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:13,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:13,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:13,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:13,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:13,834 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 [2020-07-21 10:40:14,119 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:14,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:14,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:14,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:14,145 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:14,146 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-07-21 10:40:14,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17acdd85/7b578379baea40319430bf3407cd3c02/FLAG186fe0209 [2020-07-21 10:40:14,657 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:14,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-07-21 10:40:14,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17acdd85/7b578379baea40319430bf3407cd3c02/FLAG186fe0209 [2020-07-21 10:40:15,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17acdd85/7b578379baea40319430bf3407cd3c02 [2020-07-21 10:40:15,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:15,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:15,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:15,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:15,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:15,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fc279c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15, skipping insertion in model container [2020-07-21 10:40:15,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:15,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:15,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:15,302 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:15,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:15,531 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:15,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15 WrapperNode [2020-07-21 10:40:15,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:15,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:15,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:15,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:15,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (1/1) ... [2020-07-21 10:40:15,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:15,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:15,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:15,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:15,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (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 10:40:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-07-21 10:40:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-21 10:40:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-07-21 10:40:15,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 10:40:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-07-21 10:40:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 10:40:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 10:40:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 10:40:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 10:40:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 10:40:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 10:40:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-21 10:40:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-07-21 10:40:15,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:15,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-21 10:40:15,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:15,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:16,164 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:16,164 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-21 10:40:16,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:16 BoogieIcfgContainer [2020-07-21 10:40:16,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:16,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:16,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:16,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:16,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:15" (1/3) ... [2020-07-21 10:40:16,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3c263a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:16, skipping insertion in model container [2020-07-21 10:40:16,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:15" (2/3) ... [2020-07-21 10:40:16,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3c263a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:16, skipping insertion in model container [2020-07-21 10:40:16,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:16" (3/3) ... [2020-07-21 10:40:16,176 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211b.c [2020-07-21 10:40:16,187 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:16,194 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:16,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:16,228 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:16,228 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:16,228 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:16,228 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:16,229 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:16,229 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:16,229 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:16,230 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-07-21 10:40:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:40:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:16,257 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, 1, 1, 1, 1, 1] [2020-07-21 10:40:16,257 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1328912444, now seen corresponding path program 1 times [2020-07-21 10:40:16,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:16,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329587708] [2020-07-21 10:40:16,274 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 [2020-07-21 10:40:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:16,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 10:40:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:16,430 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 10:40:16,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:16,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329587708] [2020-07-21 10:40:16,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:16,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 10:40:16,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667636526] [2020-07-21 10:40:16,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 10:40:16,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 10:40:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:40:16,461 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 2 states. [2020-07-21 10:40:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:16,497 INFO L93 Difference]: Finished difference Result 110 states and 158 transitions. [2020-07-21 10:40:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 10:40:16,498 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-07-21 10:40:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:16,509 INFO L225 Difference]: With dead ends: 110 [2020-07-21 10:40:16,509 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 10:40:16,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 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 10:40:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 10:40:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-21 10:40:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:40:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-07-21 10:40:16,559 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2020-07-21 10:40:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:16,560 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-07-21 10:40:16,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 10:40:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-07-21 10:40:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 10:40:16,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:16,562 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:16,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:16,778 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2017954314, now seen corresponding path program 1 times [2020-07-21 10:40:16,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:16,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808102575] [2020-07-21 10:40:16,780 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 [2020-07-21 10:40:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 10:40:16,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:16,887 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 10:40:16,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:16,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808102575] [2020-07-21 10:40:16,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:16,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 10:40:16,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877860037] [2020-07-21 10:40:16,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 10:40:16,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:16,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 10:40:16,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 10:40:16,892 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 3 states. [2020-07-21 10:40:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:16,908 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-07-21 10:40:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 10:40:16,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 10:40:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:16,911 INFO L225 Difference]: With dead ends: 58 [2020-07-21 10:40:16,911 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 10:40:16,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 10:40:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 10:40:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-21 10:40:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:40:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-07-21 10:40:16,922 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 30 [2020-07-21 10:40:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:16,923 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-07-21 10:40:16,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 10:40:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-07-21 10:40:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 10:40:16,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:16,925 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:17,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:17,138 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2060718957, now seen corresponding path program 1 times [2020-07-21 10:40:17,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:17,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500350754] [2020-07-21 10:40:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:17,230 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:17,255 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:17,287 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:17,287 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:17,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:17,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:17 BoogieIcfgContainer [2020-07-21 10:40:17,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:17,543 INFO L168 Benchmark]: Toolchain (without parser) took 2480.07 ms. Allocated memory was 137.4 MB in the beginning and 234.9 MB in the end (delta: 97.5 MB). Free memory was 100.8 MB in the beginning and 195.8 MB in the end (delta: -95.0 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:17,547 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:17,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.58 ms. Allocated memory was 137.4 MB in the beginning and 206.0 MB in the end (delta: 68.7 MB). Free memory was 100.4 MB in the beginning and 182.9 MB in the end (delta: -82.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:17,549 INFO L168 Benchmark]: Boogie Preprocessor took 79.78 ms. Allocated memory is still 206.0 MB. Free memory was 182.9 MB in the beginning and 180.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:17,551 INFO L168 Benchmark]: RCFGBuilder took 551.44 ms. Allocated memory is still 206.0 MB. Free memory was 180.9 MB in the beginning and 151.4 MB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:17,552 INFO L168 Benchmark]: TraceAbstraction took 1369.67 ms. Allocated memory was 206.0 MB in the beginning and 234.9 MB in the end (delta: 28.8 MB). Free memory was 151.4 MB in the beginning and 195.8 MB in the end (delta: -44.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 10:40:17,557 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 467.58 ms. Allocated memory was 137.4 MB in the beginning and 206.0 MB in the end (delta: 68.7 MB). Free memory was 100.4 MB in the beginning and 182.9 MB in the end (delta: -82.5 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.78 ms. Allocated memory is still 206.0 MB. Free memory was 182.9 MB in the beginning and 180.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 551.44 ms. Allocated memory is still 206.0 MB. Free memory was 180.9 MB in the beginning and 151.4 MB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1369.67 ms. Allocated memory was 206.0 MB in the beginning and 234.9 MB in the end (delta: 28.8 MB). Free memory was 151.4 MB in the beginning and 195.8 MB in the end (delta: -44.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 110]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 109, overapproximation of someBinaryArithmeticFLOAToperation at line 104, overapproximation of bitwiseAnd at line 93. Possible FailurePath: [L12] static const float one_modf = 1.0; VAL [\old(one_modf)=0, one_modf=1] [L104] float x = -1.0f / 0.0f; [L105] float iptr = __VERIFIER_nondet_float(); [L106] CALL, EXPR modf_float(x, &iptr) VAL [\old(x)=3, iptr={2442:0}, one_modf=1] [L15] __int32_t i0, j0; [L16] __uint32_t i; VAL [\old(x)=3, iptr={2442:0}, iptr={2442:0}, one_modf=1, x=3] [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (i0) = gf_u.word [L22] j0 = ((i0 >> 23) & 0xff) - 0x7f VAL [\old(x)=3, i0=0, iptr={2442:0}, iptr={2442:0}, one_modf=1, x=3] [L23] COND TRUE j0 < 23 VAL [\old(x)=3, i0=0, iptr={2442:0}, iptr={2442:0}, j0=-1, one_modf=1, x=3] [L24] COND TRUE j0 < 0 VAL [\old(x)=3, i0=0, iptr={2442:0}, iptr={2442:0}, j0=-1, one_modf=1, x=3] [L26] ieee_float_shape_type sf_u; [L27] sf_u.word = (i0 & 0x80000000) [L28] EXPR sf_u.value [L28] (*iptr) = sf_u.value [L30] return x; VAL [\old(x)=3, \result=3, i0=0, iptr={2442:0}, iptr={2442:0}, j0=-1, one_modf=1, x=3] [L106] RET, EXPR modf_float(x, &iptr) VAL [iptr={2442:0}, modf_float(x, &iptr)=3, one_modf=1, x=3] [L106] float res = modf_float(x, &iptr); [L109] EXPR \read(iptr) VAL [\read(iptr)=5, iptr={2442:0}, one_modf=1, res=3, x=3] [L109] CALL, EXPR isinf_float(iptr) VAL [\old(x)=5, one_modf=1] [L87] __int32_t ix; VAL [\old(x)=5, one_modf=1, x=5] [L89] ieee_float_shape_type gf_u; [L90] gf_u.value = (x) [L91] EXPR gf_u.word [L91] (ix) = gf_u.word [L93] ix &= 0x7fffffff [L94] return ((ix) == 0x7f800000L); VAL [\old(x)=5, \result=1, ix=2139095040, one_modf=1, x=5] [L109] RET, EXPR isinf_float(iptr) VAL [\read(iptr)=5, iptr={2442:0}, isinf_float(iptr)=1, one_modf=1, res=3, x=3] [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L109] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [\read(iptr)=5, iptr={2442:0}, isinf_float(iptr)=1, isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1)=1, one_modf=1, res=3, res == -0.0f && __signbit_float(res) == 1=0, x=3] [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) VAL [\read(iptr)=5, iptr={2442:0}, isinf_float(iptr)=1, isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1)=1, one_modf=1, res=3, res == -0.0f && __signbit_float(res) == 1=0, x=3] [L109] COND TRUE isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L110] __VERIFIER_error() VAL [iptr={2442:0}, one_modf=1, res=3, x=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 0 SDslu, 54 SDs, 0 SdLazy, 4 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 1546 SizeOfPredicates, 0 NumberOfNonLiveVariables, 241 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...