/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_1010.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:01,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:01,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:01,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:01,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:01,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:01,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:01,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:01,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:01,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:01,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:01,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:01,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:01,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:01,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:01,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:01,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:01,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:01,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:01,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:01,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:01,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:01,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:01,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:01,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:01,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:01,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:01,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:01,912 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 10:40:01,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:01,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:01,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:01,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:01,934 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:01,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:01,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:01,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:01,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:01,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:01,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:01,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:01,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:01,935 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:01,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:01,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:01,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:01,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:01,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:01,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:01,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:01,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:01,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:01,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:01,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:01,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:01,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:01,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:01,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:01,938 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 10:40:02,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:02,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:02,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:02,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:02,247 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:02,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2020-07-21 10:40:02,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475b600a9/ef9717b80a0549b0b63e7561f9664be6/FLAGa1e772fbf [2020-07-21 10:40:02,810 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:02,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2020-07-21 10:40:02,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475b600a9/ef9717b80a0549b0b63e7561f9664be6/FLAGa1e772fbf [2020-07-21 10:40:03,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/475b600a9/ef9717b80a0549b0b63e7561f9664be6 [2020-07-21 10:40:03,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:03,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:03,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:03,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:03,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:03,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f02511f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03, skipping insertion in model container [2020-07-21 10:40:03,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:03,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:03,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:03,439 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:03,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:03,484 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:03,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03 WrapperNode [2020-07-21 10:40:03,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:03,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:03,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:03,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:03,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (1/1) ... [2020-07-21 10:40:03,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:03,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:03,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:03,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:03,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (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 10:40:03,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-21 10:40:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-07-21 10:40:03,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 10:40:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-21 10:40:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-07-21 10:40:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 10:40:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 10:40:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 10:40:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 10:40:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 10:40:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 10:40:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:03,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:03,923 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:03,924 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 10:40:03,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:03 BoogieIcfgContainer [2020-07-21 10:40:03,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:03,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:03,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:03,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:03,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:03" (1/3) ... [2020-07-21 10:40:03,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111e175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:03, skipping insertion in model container [2020-07-21 10:40:03,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:03" (2/3) ... [2020-07-21 10:40:03,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111e175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:03, skipping insertion in model container [2020-07-21 10:40:03,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:03" (3/3) ... [2020-07-21 10:40:03,938 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1010.c [2020-07-21 10:40:03,950 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:03,962 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:03,981 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:04,012 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:04,012 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:04,013 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:04,013 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:04,013 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:04,013 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:04,014 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:04,014 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 10:40:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 10:40:04,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:04,042 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] [2020-07-21 10:40:04,042 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash -156268844, now seen corresponding path program 1 times [2020-07-21 10:40:04,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:04,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329729923] [2020-07-21 10:40:04,060 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 10:40:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 10:40:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:04,185 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 10:40:04,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:04,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329729923] [2020-07-21 10:40:04,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:04,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 10:40:04,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060656817] [2020-07-21 10:40:04,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 10:40:04,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 10:40:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:40:04,209 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-21 10:40:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:04,229 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 10:40:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 10:40:04,231 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 10:40:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:04,241 INFO L225 Difference]: With dead ends: 48 [2020-07-21 10:40:04,241 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 10:40:04,245 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 [2020-07-21 10:40:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 10:40:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 10:40:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 10:40:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-07-21 10:40:04,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 21 [2020-07-21 10:40:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:04,290 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-07-21 10:40:04,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 10:40:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-07-21 10:40:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 10:40:04,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:04,292 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] [2020-07-21 10:40:04,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:04,506 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1988246281, now seen corresponding path program 1 times [2020-07-21 10:40:04,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:04,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983072546] [2020-07-21 10:40:04,509 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 10:40:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:04,595 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:04,617 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:04,643 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:04,643 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:04,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:04,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:04 BoogieIcfgContainer [2020-07-21 10:40:04,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:04,896 INFO L168 Benchmark]: Toolchain (without parser) took 1707.48 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 101.5 MB in the beginning and 123.6 MB in the end (delta: -22.2 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:04,898 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:04,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.47 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 90.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:04,902 INFO L168 Benchmark]: Boogie Preprocessor took 132.77 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 90.9 MB in the beginning and 177.5 MB in the end (delta: -86.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:04,903 INFO L168 Benchmark]: RCFGBuilder took 308.24 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 161.7 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:04,904 INFO L168 Benchmark]: TraceAbstraction took 962.55 ms. Allocated memory is still 200.3 MB. Free memory was 161.0 MB in the beginning and 123.6 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:04,914 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.47 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 90.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.77 ms. Allocated memory was 143.7 MB in the beginning and 200.3 MB in the end (delta: 56.6 MB). Free memory was 90.9 MB in the beginning and 177.5 MB in the end (delta: -86.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.24 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 161.7 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 962.55 ms. Allocated memory is still 200.3 MB. Free memory was 161.0 MB in the beginning and 123.6 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 40]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 12, overapproximation of someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L35] float x = 0.0f / 0.0f; [L36] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L15] __uint32_t ix; VAL [\old(x)=0, x=0] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (ix) = gf_u.word [L22] ieee_float_shape_type sf_u; [L23] sf_u.word = (ix & 0x7fffffff) [L24] EXPR sf_u.value [L24] (x) = sf_u.value [L26] return x; VAL [\old(x)=0, \result=2, ix=9, x=2] [L36] RET, EXPR fabs_float(x) VAL [fabs_float(x)=2, x=0] [L36] float res = fabs_float(x); [L39] CALL, EXPR isnan_float(res) VAL [\old(x)=2] [L12] return x != x; VAL [\old(x)=2, \result=0, x=2] [L39] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=2, x=0] [L39] COND TRUE !isnan_float(res) [L40] __VERIFIER_error() VAL [res=2, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 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: 27 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=28occurred 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, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 68 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...