/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:02:24,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:02:24,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:02:24,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:02:24,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:02:24,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:02:24,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:02:24,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:02:24,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:02:24,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:02:24,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:02:24,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:02:24,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:02:24,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:02:24,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:02:24,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:02:24,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:02:24,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:02:24,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:02:24,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:02:24,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:02:24,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:02:24,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:02:24,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:02:24,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:02:24,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:02:24,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:02:24,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:02:24,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:02:24,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:02:24,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:02:24,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:02:24,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:02:24,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:02:24,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:02:24,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:02:24,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:02:24,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:02:24,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:02:24,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:02:24,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:02:24,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:02:24,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:02:24,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:02:24,246 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:02:24,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:02:24,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:02:24,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:02:24,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:02:24,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:02:24,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:02:24,247 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:02:24,522 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:02:24,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:02:24,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:02:24,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:02:24,538 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:02:24,538 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-07-07 13:02:24,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8844b0077/e13c3cdfb30b445d9c0262a88ea24ddd/FLAG77d378398 [2020-07-07 13:02:25,030 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:02:25,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252a.c [2020-07-07 13:02:25,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8844b0077/e13c3cdfb30b445d9c0262a88ea24ddd/FLAG77d378398 [2020-07-07 13:02:25,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8844b0077/e13c3cdfb30b445d9c0262a88ea24ddd [2020-07-07 13:02:25,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:02:25,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:02:25,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:02:25,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:02:25,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:02:25,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727fe0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25, skipping insertion in model container [2020-07-07 13:02:25,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:02:25,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:02:25,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:02:25,688 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:02:25,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:02:25,737 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:02:25,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25 WrapperNode [2020-07-07 13:02:25,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:02:25,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:02:25,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:02:25,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:02:25,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (1/1) ... [2020-07-07 13:02:25,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:02:25,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:02:25,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:02:25,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:02:25,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (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 [2020-07-07 13:02:25,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:02:25,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:02:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-07-07 13:02:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-07-07 13:02:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-07 13:02:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:02:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:02:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-07-07 13:02:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:02:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-07 13:02:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:02:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:02:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-07-07 13:02:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-07 13:02:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:02:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:02:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:02:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-07 13:02:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:02:26,339 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:02:26,339 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-07 13:02:26,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:02:26 BoogieIcfgContainer [2020-07-07 13:02:26,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:02:26,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:02:26,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:02:26,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:02:26,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:02:25" (1/3) ... [2020-07-07 13:02:26,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d53b9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:02:26, skipping insertion in model container [2020-07-07 13:02:26,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:02:25" (2/3) ... [2020-07-07 13:02:26,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d53b9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:02:26, skipping insertion in model container [2020-07-07 13:02:26,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:02:26" (3/3) ... [2020-07-07 13:02:26,352 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252a.c [2020-07-07 13:02:26,362 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:02:26,370 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:02:26,383 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:02:26,403 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:02:26,403 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:02:26,403 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:02:26,403 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:02:26,404 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:02:26,404 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:02:26,404 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:02:26,404 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:02:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-07-07 13:02:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 13:02:26,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:26,432 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] [2020-07-07 13:02:26,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2131665852, now seen corresponding path program 1 times [2020-07-07 13:02:26,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:26,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019934321] [2020-07-07 13:02:26,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:02:26,704 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:26,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019934321] [2020-07-07 13:02:26,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:26,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:02:26,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676457318] [2020-07-07 13:02:26,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:02:26,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:26,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:02:26,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:02:26,732 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 4 states. [2020-07-07 13:02:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:26,998 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2020-07-07 13:02:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:02:27,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-07-07 13:02:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:27,013 INFO L225 Difference]: With dead ends: 164 [2020-07-07 13:02:27,013 INFO L226 Difference]: Without dead ends: 81 [2020-07-07 13:02:27,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:02:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-07 13:02:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-07 13:02:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-07 13:02:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-07-07 13:02:27,077 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 34 [2020-07-07 13:02:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:27,078 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-07-07 13:02:27,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:02:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-07-07 13:02:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 13:02:27,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:27,082 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, 1] [2020-07-07 13:02:27,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:02:27,083 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash -630897281, now seen corresponding path program 1 times [2020-07-07 13:02:27,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:27,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640418472] [2020-07-07 13:02:27,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:02:27,339 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:27,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640418472] [2020-07-07 13:02:27,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:27,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:02:27,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671883509] [2020-07-07 13:02:27,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:02:27,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:27,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:02:27,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:27,343 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 6 states. [2020-07-07 13:02:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:27,569 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-07-07 13:02:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:02:27,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-07-07 13:02:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:27,574 INFO L225 Difference]: With dead ends: 117 [2020-07-07 13:02:27,574 INFO L226 Difference]: Without dead ends: 86 [2020-07-07 13:02:27,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-07 13:02:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-07 13:02:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-07 13:02:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-07-07 13:02:27,593 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 43 [2020-07-07 13:02:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:27,594 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-07-07 13:02:27,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:02:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-07-07 13:02:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-07 13:02:27,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:27,596 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, 1, 1, 1, 1] [2020-07-07 13:02:27,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:02:27,597 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1681903777, now seen corresponding path program 1 times [2020-07-07 13:02:27,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:27,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091784296] [2020-07-07 13:02:27,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:02:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:02:27,767 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:27,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091784296] [2020-07-07 13:02:27,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:02:27,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:02:27,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344605626] [2020-07-07 13:02:27,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:02:27,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:02:27,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:02:27,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:02:27,776 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 6 states. [2020-07-07 13:02:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:02:28,014 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2020-07-07 13:02:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:02:28,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-07-07 13:02:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:02:28,017 INFO L225 Difference]: With dead ends: 121 [2020-07-07 13:02:28,017 INFO L226 Difference]: Without dead ends: 90 [2020-07-07 13:02:28,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:02:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-07 13:02:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-07-07 13:02:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-07 13:02:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-07-07 13:02:28,039 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 46 [2020-07-07 13:02:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:02:28,039 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-07-07 13:02:28,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:02:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-07-07 13:02:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-07 13:02:28,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:02:28,041 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, 1, 1, 1, 1] [2020-07-07 13:02:28,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:02:28,042 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:02:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:02:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash -969429089, now seen corresponding path program 1 times [2020-07-07 13:02:28,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:02:28,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147072555] [2020-07-07 13:02:28,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:02:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:02:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:02:28,212 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:02:28,212 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:02:28,212 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:02:28,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:02:28,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:02:28 BoogieIcfgContainer [2020-07-07 13:02:28,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:02:28,239 INFO L168 Benchmark]: Toolchain (without parser) took 2774.61 ms. Allocated memory was 145.8 MB in the beginning and 234.4 MB in the end (delta: 88.6 MB). Free memory was 103.8 MB in the beginning and 104.1 MB in the end (delta: -297.4 kB). Peak memory consumption was 88.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:02:28,240 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:02:28,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.10 ms. Allocated memory is still 145.8 MB. Free memory was 103.6 MB in the beginning and 92.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:02:28,242 INFO L168 Benchmark]: Boogie Preprocessor took 136.58 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.6 MB in the beginning and 180.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:02:28,243 INFO L168 Benchmark]: RCFGBuilder took 468.67 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 156.9 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:02:28,244 INFO L168 Benchmark]: TraceAbstraction took 1891.24 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 156.9 MB in the beginning and 104.1 MB in the end (delta: 52.8 MB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:02:28,248 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.10 ms. Allocated memory is still 145.8 MB. Free memory was 103.6 MB in the beginning and 92.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.58 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.6 MB in the beginning and 180.9 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 468.67 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 156.9 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1891.24 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 156.9 MB in the beginning and 104.1 MB in the end (delta: 52.8 MB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 72. Possible FailurePath: [L72] float x = -0.0f; [L73] float y = 0.0f; [L75] CALL, EXPR fmax_float(x, y) [L43] CALL, EXPR __fpclassify_float(x) [L20] __uint32_t w; [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (w) = gf_u.word [L28] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L30-L31] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L33-L34] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L36] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L39] return 0; [L43] RET, EXPR __fpclassify_float(x) [L43] COND TRUE __fpclassify_float(x) == 0 [L44] return y; [L75] RET, EXPR fmax_float(x, y) [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 89 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 267 SDtfs, 53 SDslu, 494 SDs, 0 SdLazy, 352 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred 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, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...