/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:33:44,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:33:44,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:33:44,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:33:44,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:33:44,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:33:44,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:33:44,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:33:44,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:33:44,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:33:44,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:33:44,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:33:44,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:33:44,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:33:44,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:33:44,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:33:44,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:33:44,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:33:44,800 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:33:44,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:33:44,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:33:44,806 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:33:44,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:33:44,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:33:44,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:33:44,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:33:44,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:33:44,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:33:44,808 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:33:44,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:33:44,809 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:33:44,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:33:44,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:33:44,810 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:33:44,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:33:44,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:33:44,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:33:44,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:33:44,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:33:44,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:33:44,812 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:33:45,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:33:45,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:33:45,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:33:45,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:33:45,234 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:33:45,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-10-24 00:33:45,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b642604e1/0bace664b86047619f38a7c975dc178c/FLAG78719cb5d [2020-10-24 00:33:46,055 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:33:46,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-10-24 00:33:46,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b642604e1/0bace664b86047619f38a7c975dc178c/FLAG78719cb5d [2020-10-24 00:33:46,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b642604e1/0bace664b86047619f38a7c975dc178c [2020-10-24 00:33:46,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:33:46,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:33:46,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:33:46,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:33:46,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:33:46,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297f1cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46, skipping insertion in model container [2020-10-24 00:33:46,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:33:46,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:33:46,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:33:46,658 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:33:46,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:33:46,708 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:33:46,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46 WrapperNode [2020-10-24 00:33:46,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:33:46,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:33:46,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:33:46,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:33:46,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (1/1) ... [2020-10-24 00:33:46,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:33:46,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:33:46,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:33:46,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:33:46,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (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 [2020-10-24 00:33:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:33:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:33:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:33:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-10-24 00:33:46,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-24 00:33:46,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:33:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:33:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:33:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:33:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:33:46,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-24 00:33:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-10-24 00:33:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 00:33:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:33:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:33:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:33:46,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-24 00:33:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-24 00:33:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:33:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:33:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:33:46,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:33:47,428 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:33:47,429 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-24 00:33:47,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:33:47 BoogieIcfgContainer [2020-10-24 00:33:47,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:33:47,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:33:47,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:33:47,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:33:47,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:33:46" (1/3) ... [2020-10-24 00:33:47,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73850642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:33:47, skipping insertion in model container [2020-10-24 00:33:47,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:33:46" (2/3) ... [2020-10-24 00:33:47,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73850642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:33:47, skipping insertion in model container [2020-10-24 00:33:47,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:33:47" (3/3) ... [2020-10-24 00:33:47,444 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-10-24 00:33:47,457 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:33:47,462 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:33:47,477 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:33:47,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:33:47,512 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:33:47,512 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:33:47,512 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:33:47,512 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:33:47,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:33:47,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:33:47,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:33:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-10-24 00:33:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 00:33:47,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:33:47,555 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, 1] [2020-10-24 00:33:47,556 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:33:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:33:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1171811311, now seen corresponding path program 1 times [2020-10-24 00:33:47,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:33:47,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971386870] [2020-10-24 00:33:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:33:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:33:47,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:33:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:33:47,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-24 00:33:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:33:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:33:47,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971386870] [2020-10-24 00:33:47,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:33:47,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:33:47,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958946192] [2020-10-24 00:33:47,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:33:47,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:33:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:33:48,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:33:48,008 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 4 states. [2020-10-24 00:33:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:33:48,296 INFO L93 Difference]: Finished difference Result 164 states and 190 transitions. [2020-10-24 00:33:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:33:48,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-24 00:33:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:33:48,309 INFO L225 Difference]: With dead ends: 164 [2020-10-24 00:33:48,309 INFO L226 Difference]: Without dead ends: 82 [2020-10-24 00:33:48,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 00:33:48,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-24 00:33:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-24 00:33:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-24 00:33:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2020-10-24 00:33:48,369 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 33 [2020-10-24 00:33:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:33:48,370 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2020-10-24 00:33:48,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:33:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2020-10-24 00:33:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 00:33:48,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:33:48,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:33:48,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:33:48,373 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:33:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:33:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash 975669994, now seen corresponding path program 1 times [2020-10-24 00:33:48,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:33:48,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927843577] [2020-10-24 00:33:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:33:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:33:48,433 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:33:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:33:48,478 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:33:48,538 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 00:33:48,539 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 00:33:48,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:33:48,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:33:48 BoogieIcfgContainer [2020-10-24 00:33:48,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:33:48,616 INFO L168 Benchmark]: Toolchain (without parser) took 2196.86 ms. Allocated memory is still 151.0 MB. Free memory was 128.2 MB in the beginning and 63.2 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.5 MB. Max. memory is 8.0 GB. [2020-10-24 00:33:48,617 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 124.5 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:33:48,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.80 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 117.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:33:48,619 INFO L168 Benchmark]: Boogie Preprocessor took 45.21 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 00:33:48,620 INFO L168 Benchmark]: RCFGBuilder took 676.46 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 127.2 MB in the end (delta: -11.7 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:33:48,622 INFO L168 Benchmark]: TraceAbstraction took 1176.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 63.2 MB in the end (delta: 63.4 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2020-10-24 00:33:48,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 124.5 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.80 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 117.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.21 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 676.46 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 127.2 MB in the end (delta: -11.7 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1176.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 63.2 MB in the end (delta: 63.4 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 81, overapproximation of bitwiseAnd at line 25, overapproximation of someUnaryFLOAToperation at line 77, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L77] float x = -0.0f; [L78] CALL, EXPR round_float(x) VAL [\old(x)=2139095044] [L15] __uint32_t w; VAL [\old(x)=2139095044, x=2139095044] [L17] int exponent_less_127; VAL [\old(x)=2139095044, x=2139095044] [L20] ieee_float_shape_type gf_u; VAL [\old(x)=2139095044, gf_u={3:0}, x=2139095044] [L21] gf_u.value = (x) VAL [\old(x)=2139095044, gf_u={3:0}, x=2139095044] [L22] EXPR gf_u.word VAL [\old(x)=2139095044, gf_u={3:0}, gf_u.word=2139095053, x=2139095044] [L22] (w) = gf_u.word VAL [(w) = gf_u.word=2139095051, \old(x)=2139095044, gf_u={3:0}, gf_u.word=2139095053, w=2139095053, x=2139095044] [L25] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095053, x=2139095044] [L27] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095053, x=2139095044] [L43] COND TRUE exponent_less_127 == 128 VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095053, x=2139095044] [L45] return x + x; VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095053, x=2139095044] [L78] RET, EXPR round_float(x) VAL [round_float(x)=2139095041, x=2139095044] [L78] float res = round_float(x); VAL [res=2139095041, round_float(x)=2139095041, x=2139095044] [L81] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [res=2139095041, res == -0.0f && __signbit_float(res) == 1=0, x=2139095044] [L81] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) VAL [res=2139095041, res == -0.0f && __signbit_float(res) == 1=0, x=2139095044] [L82] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1032b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 15 SDslu, 63 SDs, 0 SdLazy, 103 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2368 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...