/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 --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_0730c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:36:41,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:36:41,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:36:41,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:36:41,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:36:41,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:36:41,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:36:41,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:36:41,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:36:41,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:36:41,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:36:41,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:36:41,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:36:41,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:36:41,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:36:41,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:36:41,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:36:41,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:36:41,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:36:41,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:36:41,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:36:41,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:36:41,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:36:41,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:36:41,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:36:41,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:36:41,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:36:41,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:36:41,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 21:36:41,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:36:41,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:36:41,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:36:41,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:36:41,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:36:41,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:36:41,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:36:41,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:36:41,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:36:41,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:36:41,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:36:41,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:36:41,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:36:41,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:36:41,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:36:41,634 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:36:41,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:36:41,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:36:41,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:36:41,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:36:41,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:36:41,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:36:41,635 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-09-04 21:36:42,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:36:42,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:36:42,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:36:42,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:36:42,125 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:36:42,126 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c [2020-09-04 21:36:42,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a10b7820/53589f0c707f4c6fa4dbe794a6e3af23/FLAG5ff45745d [2020-09-04 21:36:42,778 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:36:42,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c [2020-09-04 21:36:42,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a10b7820/53589f0c707f4c6fa4dbe794a6e3af23/FLAG5ff45745d [2020-09-04 21:36:43,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a10b7820/53589f0c707f4c6fa4dbe794a6e3af23 [2020-09-04 21:36:43,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:36:43,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:36:43,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:36:43,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:36:43,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:36:43,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9ac829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43, skipping insertion in model container [2020-09-04 21:36:43,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:36:43,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:36:43,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:36:43,386 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:36:43,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:36:43,552 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:36:43,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43 WrapperNode [2020-09-04 21:36:43,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:36:43,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:36:43,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:36:43,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:36:43,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... [2020-09-04 21:36:43,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:36:43,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:36:43,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:36:43,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:36:43,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 21:36:43,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:36:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:36:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-09-04 21:36:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-04 21:36:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:36:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:36:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-04 21:36:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-09-04 21:36:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 21:36:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-04 21:36:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 21:36:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 21:36:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 21:36:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-04 21:36:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-04 21:36:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:36:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:36:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:36:44,178 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:36:44,179 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-04 21:36:44,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:36:44 BoogieIcfgContainer [2020-09-04 21:36:44,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:36:44,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:36:44,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:36:44,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:36:44,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:36:43" (1/3) ... [2020-09-04 21:36:44,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1ea181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:36:44, skipping insertion in model container [2020-09-04 21:36:44,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:36:43" (2/3) ... [2020-09-04 21:36:44,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1ea181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:36:44, skipping insertion in model container [2020-09-04 21:36:44,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:36:44" (3/3) ... [2020-09-04 21:36:44,200 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730c.c [2020-09-04 21:36:44,211 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:36:44,221 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:36:44,240 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:36:44,263 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:36:44,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:36:44,264 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:36:44,264 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:36:44,264 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:36:44,264 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:36:44,265 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:36:44,265 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:36:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2020-09-04 21:36:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 21:36:44,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:36:44,297 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] [2020-09-04 21:36:44,298 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:36:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:36:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1619390018, now seen corresponding path program 1 times [2020-09-04 21:36:44,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:36:44,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748287749] [2020-09-04 21:36:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:36:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:44,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:36:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:44,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 21:36:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:36:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:36:44,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748287749] [2020-09-04 21:36:44,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:36:44,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 21:36:44,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461403787] [2020-09-04 21:36:44,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 21:36:44,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:36:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 21:36:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 21:36:44,645 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 4 states. [2020-09-04 21:36:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:36:45,000 INFO L93 Difference]: Finished difference Result 220 states and 261 transitions. [2020-09-04 21:36:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 21:36:45,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-09-04 21:36:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:36:45,017 INFO L225 Difference]: With dead ends: 220 [2020-09-04 21:36:45,017 INFO L226 Difference]: Without dead ends: 113 [2020-09-04 21:36:45,023 INFO L675 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 [2020-09-04 21:36:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-04 21:36:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-09-04 21:36:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-04 21:36:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-09-04 21:36:45,106 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 35 [2020-09-04 21:36:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:36:45,107 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-09-04 21:36:45,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 21:36:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-09-04 21:36:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 21:36:45,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:36:45,109 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] [2020-09-04 21:36:45,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:36:45,110 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:36:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:36:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1569420762, now seen corresponding path program 1 times [2020-09-04 21:36:45,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:36:45,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079353383] [2020-09-04 21:36:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:36:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:36:45,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:36:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:36:45,182 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:36:45,214 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 21:36:45,214 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 21:36:45,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:36:45,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 09:36:45 BoogieIcfgContainer [2020-09-04 21:36:45,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 21:36:45,276 INFO L168 Benchmark]: Toolchain (without parser) took 2173.81 ms. Allocated memory was 140.0 MB in the beginning and 236.5 MB in the end (delta: 96.5 MB). Free memory was 103.2 MB in the beginning and 197.3 MB in the end (delta: -94.1 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:45,277 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-04 21:36:45,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 449.69 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 103.0 MB in the beginning and 179.9 MB in the end (delta: -77.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:45,279 INFO L168 Benchmark]: Boogie Preprocessor took 52.51 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 177.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:45,280 INFO L168 Benchmark]: RCFGBuilder took 580.40 ms. Allocated memory is still 201.9 MB. Free memory was 177.4 MB in the beginning and 148.8 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-09-04 21:36:45,281 INFO L168 Benchmark]: TraceAbstraction took 1081.35 ms. Allocated memory was 201.9 MB in the beginning and 236.5 MB in the end (delta: 34.6 MB). Free memory was 148.8 MB in the beginning and 197.3 MB in the end (delta: -48.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 21:36:45,285 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 449.69 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 103.0 MB in the beginning and 179.9 MB in the end (delta: -77.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.51 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 177.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 580.40 ms. Allocated memory is still 201.9 MB. Free memory was 177.4 MB in the beginning and 148.8 MB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1081.35 ms. Allocated memory was 201.9 MB in the beginning and 236.5 MB in the end (delta: 34.6 MB). Free memory was 148.8 MB in the beginning and 197.3 MB in the end (delta: -48.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 106]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 105, overapproximation of bitwiseAnd at line 24, overapproximation of someUnaryFLOAToperation at line 101, overapproximation of someBinaryArithmeticFLOAToperation at line 27. Possible FailurePath: [L12] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [\old(one_sqrt)=2139095046, \old(tiny_sqrt)=2139095045, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L101] float x = -0.0f; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L102] CALL, EXPR __ieee754_sqrtf(x) VAL [\old(x)=2139095047, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L15] float z; VAL [\old(x)=2139095047, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L16] __uint32_t r, hx; VAL [\old(x)=2139095047, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L17] __int32_t ix, s, q, m, t, i; VAL [\old(x)=2139095047, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L20] ieee_float_shape_type gf_u; VAL [\old(x)=2139095047, gf_u={2:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L21] gf_u.value = (x) VAL [\old(x)=2139095047, gf_u={2:0}, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L22] EXPR gf_u.word VAL [\old(x)=2139095047, gf_u={2:0}, gf_u.word=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L22] (ix) = gf_u.word VAL [(ix) = gf_u.word=2139095044, \old(x)=2139095047, gf_u={2:0}, gf_u.word=0, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L24] hx = ix & 0x7fffffff VAL [\old(x)=2139095047, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L26] COND TRUE !((hx) < 0x7f800000L) VAL [\old(x)=2139095047, hx=2139095040, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L27] return x * x + x; VAL [\old(x)=2139095047, hx=2139095040, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L102] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=2139095041, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L102] float res = __ieee754_sqrtf(x); VAL [__ieee754_sqrtf(x)=2139095041, one_sqrt=1, res=2139095041, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L105] EXPR res == -0.0f && __signbit_float(res) == 1 VAL [one_sqrt=1, res=2139095041, res == -0.0f && __signbit_float(res) == 1=0, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L105] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) VAL [one_sqrt=1, res=2139095041, res == -0.0f && __signbit_float(res) == 1=0, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] [L106] __VERIFIER_error() VAL [one_sqrt=1, res=2139095041, tiny_sqrt=1/1000000000000000000000000000000, x=2139095047] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 27 SDslu, 98 SDs, 0 SdLazy, 132 SolverSat, 6 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=121occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 2074 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...