/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_1232a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:25:32,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:32,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:32,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:25:32,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:25:32,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:25:32,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:25:32,564 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 20:25:32,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:32,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:32,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:32,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:32,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:32,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:32,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:32,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:32,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:32,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:32,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:32,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:32,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:32,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:32,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:32,595 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:32,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:32,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:32,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:32,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:32,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:32,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:32,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:33,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:33,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:33,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:33,079 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:33,082 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:33,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1232a.c [2020-10-23 20:25:33,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26288f344/56f075a18dfa498ca01f0dd091bae57d/FLAG885ef6d83 [2020-10-23 20:25:33,780 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:33,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1232a.c [2020-10-23 20:25:33,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26288f344/56f075a18dfa498ca01f0dd091bae57d/FLAG885ef6d83 [2020-10-23 20:25:34,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26288f344/56f075a18dfa498ca01f0dd091bae57d [2020-10-23 20:25:34,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:34,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:34,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:34,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:34,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:34,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7c2189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34, skipping insertion in model container [2020-10-23 20:25:34,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:34,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:34,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:34,468 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:34,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:34,518 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:34,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34 WrapperNode [2020-10-23 20:25:34,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:34,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:34,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:34,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:34,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (1/1) ... [2020-10-23 20:25:34,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:34,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:34,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:34,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:34,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (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 20:25:34,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:34,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:34,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:34,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2020-10-23 20:25:34,702 INFO L138 BoogieDeclarations]: Found implementation of procedure fmin_float [2020-10-23 20:25:34,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-23 20:25:34,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:34,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:34,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:34,704 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:34,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:34,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-23 20:25:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2020-10-23 20:25:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 20:25:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:34,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:25:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure fmin_float [2020-10-23 20:25:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-23 20:25:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:34,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:34,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 20:25:35,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:25:35,373 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-23 20:25:35,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:35 BoogieIcfgContainer [2020-10-23 20:25:35,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:25:35,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:25:35,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:25:35,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:25:35,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:34" (1/3) ... [2020-10-23 20:25:35,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118e1f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:35, skipping insertion in model container [2020-10-23 20:25:35,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:34" (2/3) ... [2020-10-23 20:25:35,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118e1f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:35, skipping insertion in model container [2020-10-23 20:25:35,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:35" (3/3) ... [2020-10-23 20:25:35,385 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232a.c [2020-10-23 20:25:35,396 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:25:35,402 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:25:35,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:25:35,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:25:35,438 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:25:35,438 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:25:35,438 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:25:35,439 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:25:35,439 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:25:35,439 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:25:35,439 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:25:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-10-23 20:25:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 20:25:35,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:35,471 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 20:25:35,471 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash 3196274, now seen corresponding path program 1 times [2020-10-23 20:25:35,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:35,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423914732] [2020-10-23 20:25:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:35,573 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:35,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:35,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:25:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:35,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:25:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:35,840 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 20:25:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423914732] [2020-10-23 20:25:35,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:35,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:35,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898870816] [2020-10-23 20:25:35,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:35,871 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 4 states. [2020-10-23 20:25:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:36,343 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2020-10-23 20:25:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:36,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-23 20:25:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:36,356 INFO L225 Difference]: With dead ends: 173 [2020-10-23 20:25:36,356 INFO L226 Difference]: Without dead ends: 87 [2020-10-23 20:25:36,361 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 20:25:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-23 20:25:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-23 20:25:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-23 20:25:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-10-23 20:25:36,443 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 40 [2020-10-23 20:25:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:36,444 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-10-23 20:25:36,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-10-23 20:25:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 20:25:36,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:36,447 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 20:25:36,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:25:36,448 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1077827938, now seen corresponding path program 1 times [2020-10-23 20:25:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:36,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459987317] [2020-10-23 20:25:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:36,453 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:25:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:25:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:36,758 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 20:25:36,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459987317] [2020-10-23 20:25:36,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:36,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:25:36,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73081095] [2020-10-23 20:25:36,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:25:36,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:25:36,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:25:36,762 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 6 states. [2020-10-23 20:25:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:37,357 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-10-23 20:25:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:25:37,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-23 20:25:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:37,362 INFO L225 Difference]: With dead ends: 124 [2020-10-23 20:25:37,362 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 20:25:37,364 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 20:25:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 20:25:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-23 20:25:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 20:25:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-23 20:25:37,384 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 49 [2020-10-23 20:25:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:37,385 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-23 20:25:37,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:25:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-23 20:25:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 20:25:37,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:37,387 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 20:25:37,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:25:37,388 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash -449859217, now seen corresponding path program 1 times [2020-10-23 20:25:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:37,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533183163] [2020-10-23 20:25:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:37,392 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:25:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:25:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:37,573 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 20:25:37,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533183163] [2020-10-23 20:25:37,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:37,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:25:37,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579752218] [2020-10-23 20:25:37,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:25:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:25:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:25:37,577 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 6 states. [2020-10-23 20:25:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:37,949 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2020-10-23 20:25:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:25:37,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-23 20:25:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:37,952 INFO L225 Difference]: With dead ends: 128 [2020-10-23 20:25:37,952 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 20:25:37,957 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 20:25:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 20:25:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-10-23 20:25:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 20:25:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-23 20:25:37,985 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 52 [2020-10-23 20:25:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:37,985 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-23 20:25:37,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:25:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-23 20:25:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 20:25:37,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:37,996 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 20:25:37,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:25:37,996 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 162019631, now seen corresponding path program 1 times [2020-10-23 20:25:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:37,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649489944] [2020-10-23 20:25:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:38,005 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:38,048 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:38,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:38,125 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:25:38,126 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:25:38,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:25:38,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:25:38 BoogieIcfgContainer [2020-10-23 20:25:38,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:25:38,149 INFO L168 Benchmark]: Toolchain (without parser) took 3974.11 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 141.0 MB in the beginning and 167.4 MB in the end (delta: -26.4 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,149 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 165.7 MB. Free memory is still 140.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:25:38,150 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.09 ms. Allocated memory is still 165.7 MB. Free memory was 140.5 MB in the beginning and 130.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,151 INFO L168 Benchmark]: Boogie Preprocessor took 87.94 ms. Allocated memory is still 165.7 MB. Free memory was 130.1 MB in the beginning and 128.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,152 INFO L168 Benchmark]: RCFGBuilder took 767.39 ms. Allocated memory is still 165.7 MB. Free memory was 128.4 MB in the beginning and 142.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,153 INFO L168 Benchmark]: TraceAbstraction took 2768.52 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 142.4 MB in the beginning and 167.4 MB in the end (delta: -25.0 MB). Peak memory consumption was 9.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:38,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 165.7 MB. Free memory is still 140.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 334.09 ms. Allocated memory is still 165.7 MB. Free memory was 140.5 MB in the beginning and 130.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.94 ms. Allocated memory is still 165.7 MB. Free memory was 130.1 MB in the beginning and 128.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 767.39 ms. Allocated memory is still 165.7 MB. Free memory was 128.4 MB in the beginning and 142.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 21.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2768.52 ms. Allocated memory was 165.7 MB in the beginning and 199.2 MB in the end (delta: 33.6 MB). Free memory was 142.4 MB in the beginning and 167.4 MB in the end (delta: -25.0 MB). Peak memory consumption was 9.1 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 67. 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_1232a.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: 2.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.4s, 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, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s 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...