/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_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:25:08,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:25:08,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:25:08,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:25:08,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:25:08,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:25:08,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:25:08,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:25:08,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:25:08,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:25:08,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:25:08,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:25:08,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:25:08,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:25:08,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:25:08,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:25:08,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:25:08,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:25:08,457 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:25:08,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:25:08,458 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:25:08,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:25:08,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:25:08,459 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:25:08,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:25:08,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:25:08,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:08,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:25:08,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:25:08,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:25:08,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:25:08,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:25:09,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:25:09,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:25:09,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:25:09,018 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:25:09,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-11-07 00:25:09,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128862593/c7b8311e5dfc45ee99e999a99bbbe6f2/FLAGc99456972 [2020-11-07 00:25:09,640 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:25:09,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1252b.c [2020-11-07 00:25:09,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128862593/c7b8311e5dfc45ee99e999a99bbbe6f2/FLAGc99456972 [2020-11-07 00:25:10,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128862593/c7b8311e5dfc45ee99e999a99bbbe6f2 [2020-11-07 00:25:10,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:25:10,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:25:10,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:10,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:25:10,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:25:10,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7015976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10, skipping insertion in model container [2020-11-07 00:25:10,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:25:10,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:25:10,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:10,283 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:25:10,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:10,324 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:25:10,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10 WrapperNode [2020-11-07 00:25:10,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:10,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:25:10,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:25:10,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:25:10,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (1/1) ... [2020-11-07 00:25:10,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:25:10,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:25:10,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:25:10,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:25:10,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (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 [2020-11-07 00:25:10,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:25:10,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:25:10,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:25:10,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-11-07 00:25:10,494 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_float [2020-11-07 00:25:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-11-07 00:25:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:25:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:25:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:25:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:25:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:25:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-07 00:25:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-11-07 00:25:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 00:25:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:25:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:25:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_float [2020-11-07 00:25:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-11-07 00:25:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:25:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:25:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:25:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:25:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 00:25:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:25:11,250 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:25:11,250 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-07 00:25:11,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:11 BoogieIcfgContainer [2020-11-07 00:25:11,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:25:11,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:25:11,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:25:11,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:25:11,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:25:10" (1/3) ... [2020-11-07 00:25:11,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fddfd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:11, skipping insertion in model container [2020-11-07 00:25:11,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:10" (2/3) ... [2020-11-07 00:25:11,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fddfd11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:11, skipping insertion in model container [2020-11-07 00:25:11,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:11" (3/3) ... [2020-11-07 00:25:11,262 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2020-11-07 00:25:11,280 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:25:11,284 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:25:11,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:25:11,323 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:25:11,324 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:25:11,324 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:25:11,324 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:25:11,324 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:25:11,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:25:11,324 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:25:11,325 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:25:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-11-07 00:25:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-07 00:25:11,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:11,359 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] [2020-11-07 00:25:11,360 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:11,379 INFO L82 PathProgramCache]: Analyzing trace with hash 580661350, now seen corresponding path program 1 times [2020-11-07 00:25:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:11,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920401079] [2020-11-07 00:25:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:11,475 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:11,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:25:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:11,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:25:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:11,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920401079] [2020-11-07 00:25:11,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:11,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:25:11,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715086386] [2020-11-07 00:25:11,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:25:11,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:25:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:25:11,751 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 4 states. [2020-11-07 00:25:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:12,134 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2020-11-07 00:25:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:25:12,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-11-07 00:25:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:12,146 INFO L225 Difference]: With dead ends: 173 [2020-11-07 00:25:12,147 INFO L226 Difference]: Without dead ends: 87 [2020-11-07 00:25:12,151 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 [2020-11-07 00:25:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-07 00:25:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-07 00:25:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-07 00:25:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-11-07 00:25:12,219 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 40 [2020-11-07 00:25:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:12,220 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-11-07 00:25:12,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:25:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-11-07 00:25:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 00:25:12,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:12,224 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] [2020-11-07 00:25:12,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:25:12,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:12,226 INFO L82 PathProgramCache]: Analyzing trace with hash 997701105, now seen corresponding path program 1 times [2020-11-07 00:25:12,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:12,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651757172] [2020-11-07 00:25:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:12,256 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:12,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:12,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:25:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:12,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:25:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:12,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651757172] [2020-11-07 00:25:12,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:12,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:25:12,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800795585] [2020-11-07 00:25:12,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:25:12,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:12,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:25:12,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:25:12,479 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 6 states. [2020-11-07 00:25:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:12,804 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-11-07 00:25:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:25:12,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-11-07 00:25:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:12,809 INFO L225 Difference]: With dead ends: 124 [2020-11-07 00:25:12,809 INFO L226 Difference]: Without dead ends: 92 [2020-11-07 00:25:12,811 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 [2020-11-07 00:25:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-07 00:25:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-11-07 00:25:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 00:25:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-11-07 00:25:12,829 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 49 [2020-11-07 00:25:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:12,830 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-11-07 00:25:12,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:25:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-11-07 00:25:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 00:25:12,832 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:12,832 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] [2020-11-07 00:25:12,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:25:12,832 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:12,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1233779619, now seen corresponding path program 1 times [2020-11-07 00:25:12,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:12,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436654516] [2020-11-07 00:25:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:12,840 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:12,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:12,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:25:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:13,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:25:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:13,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436654516] [2020-11-07 00:25:13,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:13,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:25:13,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971160733] [2020-11-07 00:25:13,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:25:13,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:13,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:25:13,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:25:13,054 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 6 states. [2020-11-07 00:25:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:13,369 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-11-07 00:25:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:25:13,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-11-07 00:25:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:13,371 INFO L225 Difference]: With dead ends: 128 [2020-11-07 00:25:13,372 INFO L226 Difference]: Without dead ends: 96 [2020-11-07 00:25:13,376 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 [2020-11-07 00:25:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-07 00:25:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-11-07 00:25:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-07 00:25:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-11-07 00:25:13,403 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 52 [2020-11-07 00:25:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:13,408 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-11-07 00:25:13,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:25:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-11-07 00:25:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-07 00:25:13,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:13,411 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] [2020-11-07 00:25:13,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:25:13,412 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:13,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:13,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1845658467, now seen corresponding path program 1 times [2020-11-07 00:25:13,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:13,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966645874] [2020-11-07 00:25:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:13,421 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:13,466 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:13,508 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:13,552 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:25:13,552 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:25:13,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:25:13,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:25:13 BoogieIcfgContainer [2020-11-07 00:25:13,577 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:25:13,582 INFO L168 Benchmark]: Toolchain (without parser) took 3571.39 ms. Allocated memory was 154.1 MB in the beginning and 195.0 MB in the end (delta: 40.9 MB). Free memory was 129.5 MB in the beginning and 163.3 MB in the end (delta: -33.8 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,582 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:25:13,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.69 ms. Allocated memory is still 154.1 MB. Free memory was 128.8 MB in the beginning and 118.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,586 INFO L168 Benchmark]: Boogie Preprocessor took 81.21 ms. Allocated memory is still 154.1 MB. Free memory was 118.5 MB in the beginning and 116.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,588 INFO L168 Benchmark]: RCFGBuilder took 844.29 ms. Allocated memory is still 154.1 MB. Free memory was 116.7 MB in the beginning and 129.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,591 INFO L168 Benchmark]: TraceAbstraction took 2322.52 ms. Allocated memory was 154.1 MB in the beginning and 195.0 MB in the end (delta: 40.9 MB). Free memory was 129.4 MB in the beginning and 163.3 MB in the end (delta: -34.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,601 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.69 ms. Allocated memory is still 154.1 MB. Free memory was 128.8 MB in the beginning and 118.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 81.21 ms. Allocated memory is still 154.1 MB. Free memory was 118.5 MB in the beginning and 116.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 844.29 ms. Allocated memory is still 154.1 MB. Free memory was 116.7 MB in the beginning and 129.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2322.52 ms. Allocated memory was 154.1 MB in the beginning and 195.0 MB in the end (delta: 40.9 MB). Free memory was 129.4 MB in the beginning and 163.3 MB in the end (delta: -34.0 MB). Peak memory consumption was 8.0 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 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L77] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] RET, EXPR __fpclassify_float(x) [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] RET, EXPR fmax_float(x, y) [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1252b.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: 2.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.0s, 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: 0.0s 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...