/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:25:33,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:33,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:33,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:25:33,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:25:33,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:33,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:33,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:33,622 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:33,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:33,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:33,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:33,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:33,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:33,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:33,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:33,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:33,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:33,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:33,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:33,626 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:33,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:33,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:33,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:33,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:33,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:33,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:33,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:34,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:34,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:34,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:34,085 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:34,086 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:34,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-10-23 20:25:34,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780856297/67017e0886124fbfa3963030014cd6c3/FLAG4f5adc4d5 [2020-10-23 20:25:34,813 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:34,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1232b.c [2020-10-23 20:25:34,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780856297/67017e0886124fbfa3963030014cd6c3/FLAG4f5adc4d5 [2020-10-23 20:25:35,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780856297/67017e0886124fbfa3963030014cd6c3 [2020-10-23 20:25:35,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:35,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:35,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:35,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:35,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:35,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cbadeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35, skipping insertion in model container [2020-10-23 20:25:35,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:35,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:35,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:35,410 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:35,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:35,457 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:35,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35 WrapperNode [2020-10-23 20:25:35,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:35,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:35,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:35,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:35,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (1/1) ... [2020-10-23 20:25:35,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:35,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:35,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:35,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:35,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (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 [2020-10-23 20:25:35,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:35,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:35,605 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:35,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-10-23 20:25:35,605 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2020-10-23 20:25:35,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 20:25:35,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:35,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 20:25:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-10-23 20:25:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 20:25:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:25:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2020-10-23 20:25:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 20:25:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:35,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:35,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 20:25:36,173 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:25:36,173 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-23 20:25:36,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:36 BoogieIcfgContainer [2020-10-23 20:25:36,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:25:36,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:25:36,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:25:36,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:25:36,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:35" (1/3) ... [2020-10-23 20:25:36,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1e3df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:36, skipping insertion in model container [2020-10-23 20:25:36,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:35" (2/3) ... [2020-10-23 20:25:36,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1e3df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:36, skipping insertion in model container [2020-10-23 20:25:36,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:36" (3/3) ... [2020-10-23 20:25:36,185 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-10-23 20:25:36,197 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:25:36,202 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:25:36,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:25:36,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:25:36,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:25:36,245 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:25:36,245 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:25:36,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:25:36,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:25:36,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:25:36,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:25:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-10-23 20:25:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 20:25:36,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:36,281 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] [2020-10-23 20:25:36,282 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash 3196274, now seen corresponding path program 1 times [2020-10-23 20:25:36,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:36,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583162669] [2020-10-23 20:25:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:36,392 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:25:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:25:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:25:36,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583162669] [2020-10-23 20:25:36,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:36,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:36,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973768757] [2020-10-23 20:25:36,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:36,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:36,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:36,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:36,742 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 4 states. [2020-10-23 20:25:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:37,309 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2020-10-23 20:25:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:37,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-23 20:25:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:37,327 INFO L225 Difference]: With dead ends: 173 [2020-10-23 20:25:37,327 INFO L226 Difference]: Without dead ends: 87 [2020-10-23 20:25:37,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:25:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-23 20:25:37,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-23 20:25:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-23 20:25:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-23 20:25:37,432 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 40 [2020-10-23 20:25:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:37,433 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-23 20:25:37,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-23 20:25:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 20:25:37,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:37,439 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, 1, 1, 1] [2020-10-23 20:25:37,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:25:37,440 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1077827938, now seen corresponding path program 1 times [2020-10-23 20:25:37,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:37,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317490111] [2020-10-23 20:25:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:37,455 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:25:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:25:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:25:37,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317490111] [2020-10-23 20:25:37,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:37,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:25:37,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303814888] [2020-10-23 20:25:37,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:25:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:25:37,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:25:37,696 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 6 states. [2020-10-23 20:25:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:38,015 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-23 20:25:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:25:38,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-23 20:25:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:38,020 INFO L225 Difference]: With dead ends: 124 [2020-10-23 20:25:38,020 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 20:25:38,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:25:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 20:25:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-23 20:25:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 20:25:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-23 20:25:38,039 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 49 [2020-10-23 20:25:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:38,040 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-23 20:25:38,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:25:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-23 20:25:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 20:25:38,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:38,042 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, 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] [2020-10-23 20:25:38,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:25:38,043 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:38,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:38,043 INFO L82 PathProgramCache]: Analyzing trace with hash -449859217, now seen corresponding path program 1 times [2020-10-23 20:25:38,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:38,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130708482] [2020-10-23 20:25:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:38,047 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:38,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:38,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:25:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:38,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:25:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:25:38,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130708482] [2020-10-23 20:25:38,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:38,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:25:38,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759756864] [2020-10-23 20:25:38,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:25:38,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:38,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:25:38,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:25:38,215 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 6 states. [2020-10-23 20:25:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:38,547 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-10-23 20:25:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:25:38,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-23 20:25:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:38,550 INFO L225 Difference]: With dead ends: 128 [2020-10-23 20:25:38,550 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 20:25:38,551 INFO L677 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 [2020-10-23 20:25:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 20:25:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-10-23 20:25:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 20:25:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-23 20:25:38,566 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 52 [2020-10-23 20:25:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:38,567 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-23 20:25:38,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:25:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-23 20:25:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 20:25:38,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:38,569 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, 1, 1, 1, 1, 1, 1] [2020-10-23 20:25:38,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:25:38,570 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash 162019631, now seen corresponding path program 1 times [2020-10-23 20:25:38,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:38,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933518323] [2020-10-23 20:25:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:38,580 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:38,605 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:38,625 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:38,659 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:25:38,659 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:25:38,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:25:38,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:25:38 BoogieIcfgContainer [2020-10-23 20:25:38,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:25:38,684 INFO L168 Benchmark]: Toolchain (without parser) took 3525.61 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 129.4 MB in the beginning and 136.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 24.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,684 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 100.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:25:38,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.51 ms. Allocated memory is still 152.0 MB. Free memory was 128.8 MB in the beginning and 118.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,686 INFO L168 Benchmark]: Boogie Preprocessor took 49.12 ms. Allocated memory is still 152.0 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,687 INFO L168 Benchmark]: RCFGBuilder took 666.20 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 125.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,689 INFO L168 Benchmark]: TraceAbstraction took 2503.40 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 124.8 MB in the beginning and 136.6 MB in the end (delta: -11.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 100.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 294.51 ms. Allocated memory is still 152.0 MB. Free memory was 128.8 MB in the beginning and 118.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.12 ms. Allocated memory is still 152.0 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 666.20 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 125.3 MB in the end (delta: -8.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2503.40 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 124.8 MB in the beginning and 136.6 MB in the end (delta: -11.8 MB). Peak memory consumption was 18.5 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 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L68] CALL, EXPR fmin_float(x, y) [L38] CALL, EXPR __fpclassify_float(x) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] RET, EXPR __fpclassify_float(x) [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] RET, EXPR fmin_float(x, y) [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L72] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 59 SDslu, 511 SDs, 0 SdLazy, 383 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred 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: 0.1s 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...