/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_1072b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:25:24,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:24,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:24,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:25:24,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:25:24,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:25:24,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:25:24,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:25:24,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:25:24,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:25:24,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:25:24,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:25:24,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:25:24,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:25:24,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:25:24,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:25:24,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:25:24,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:25:24,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:25:24,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:25:24,205 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 20:25:24,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:24,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:24,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:24,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:24,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:24,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:24,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:24,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:24,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:24,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:24,224 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:24,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:24,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:24,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:24,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:24,226 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:24,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:24,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:24,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:24,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:24,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:24,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:24,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:24,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:24,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:24,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:24,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:24,667 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:24,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072b.c [2020-10-23 20:25:24,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff4d3d05e/ada3027db8f04b7fb59996bcaadf87ee/FLAGc166bc9e7 [2020-10-23 20:25:25,408 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:25,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072b.c [2020-10-23 20:25:25,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff4d3d05e/ada3027db8f04b7fb59996bcaadf87ee/FLAGc166bc9e7 [2020-10-23 20:25:25,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff4d3d05e/ada3027db8f04b7fb59996bcaadf87ee [2020-10-23 20:25:25,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:25,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:25,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:25,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:25,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:25,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:25" (1/1) ... [2020-10-23 20:25:25,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfc022e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:25, skipping insertion in model container [2020-10-23 20:25:25,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:25" (1/1) ... [2020-10-23 20:25:25,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:25,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:26,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:26,037 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:26,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:26,082 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:26,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26 WrapperNode [2020-10-23 20:25:26,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:26,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:26,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:26,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:26,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (1/1) ... [2020-10-23 20:25:26,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (1/1) ... [2020-10-23 20:25:26,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (1/1) ... [2020-10-23 20:25:26,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (1/1) ... [2020-10-23 20:25:26,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (1/1) ... [2020-10-23 20:25:26,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (1/1) ... [2020-10-23 20:25:26,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (1/1) ... [2020-10-23 20:25:26,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:26,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:26,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:26,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:26,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (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 20:25:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:26,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-10-23 20:25:26,223 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-10-23 20:25:26,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:26,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-10-23 20:25:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 20:25:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:25:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 20:25:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-10-23 20:25:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:26,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:26,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:26,850 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:25:26,851 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-23 20:25:26,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:26 BoogieIcfgContainer [2020-10-23 20:25:26,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:25:26,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:25:26,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:25:26,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:25:26,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:25" (1/3) ... [2020-10-23 20:25:26,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b52bb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:26, skipping insertion in model container [2020-10-23 20:25:26,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:26" (2/3) ... [2020-10-23 20:25:26,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b52bb9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:26, skipping insertion in model container [2020-10-23 20:25:26,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:26" (3/3) ... [2020-10-23 20:25:26,862 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072b.c [2020-10-23 20:25:26,875 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:25:26,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:25:26,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:25:26,928 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:25:26,928 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:25:26,929 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:25:26,929 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:25:26,929 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:25:26,929 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:25:26,929 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:25:26,929 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:25:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2020-10-23 20:25:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 20:25:26,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:26,965 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] [2020-10-23 20:25:26,965 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1064733081, now seen corresponding path program 1 times [2020-10-23 20:25:26,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:26,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526578578] [2020-10-23 20:25:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:27,067 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:27,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:27,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:25:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:27,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-23 20:25:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:27,337 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 20:25:27,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526578578] [2020-10-23 20:25:27,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:27,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:27,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826070019] [2020-10-23 20:25:27,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:27,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:27,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:27,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:27,367 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 4 states. [2020-10-23 20:25:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:27,825 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2020-10-23 20:25:27,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:27,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-23 20:25:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:27,837 INFO L225 Difference]: With dead ends: 161 [2020-10-23 20:25:27,837 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 20:25:27,842 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 20:25:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 20:25:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-23 20:25:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-23 20:25:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-23 20:25:27,904 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 41 [2020-10-23 20:25:27,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:27,904 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-23 20:25:27,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-23 20:25:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:25:27,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:27,908 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:25:27,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:25:27,908 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash -688613008, now seen corresponding path program 1 times [2020-10-23 20:25:27,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:27,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465717014] [2020-10-23 20:25:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:27,914 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:28,023 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:25:28,158 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:25:28,197 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:25:28,197 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:25:28,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:25:28,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:25:28 BoogieIcfgContainer [2020-10-23 20:25:28,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:25:28,222 INFO L168 Benchmark]: Toolchain (without parser) took 2419.40 ms. Allocated memory is still 151.0 MB. Free memory was 127.9 MB in the beginning and 58.6 MB in the end (delta: 69.3 MB). Peak memory consumption was 69.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:28,222 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:25:28,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.84 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:28,224 INFO L168 Benchmark]: Boogie Preprocessor took 48.76 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:28,225 INFO L168 Benchmark]: RCFGBuilder took 719.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 127.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 20.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:28,226 INFO L168 Benchmark]: TraceAbstraction took 1364.12 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 58.6 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:25:28,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.84 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.76 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 719.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 127.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 20.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1364.12 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 58.6 MB in the end (delta: 68.7 MB). Peak memory consumption was 68.2 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 someBinaryArithmeticFLOAToperation at line 39, overapproximation of bitwiseAnd at line 52. Possible FailurePath: [L63] float x = -1.0f / 0.0f; [L64] CALL, EXPR trunc_float(x) [L14] __int32_t signbit, w, exponent_less_127; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L20] signbit = w & 0x80000000 [L21] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L22] COND FALSE !(exponent_less_127 < 23) [L38] COND TRUE exponent_less_127 == 255 [L39] return x + x; [L64] RET, EXPR trunc_float(x) [L64] float res = trunc_float(x); [L67] CALL, EXPR isinf_float(res) [L46] __int32_t ix; [L48] ieee_float_shape_type gf_u; [L49] gf_u.value = (x) [L50] EXPR gf_u.word [L50] (ix) = gf_u.word [L52] ix &= 0x7fffffff [L53] return ((ix) == 0x7f800000L); [L67] RET, EXPR isinf_float(res) [L67] COND TRUE !isinf_float(res) [L68] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1072b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 17 SDslu, 53 SDs, 0 SdLazy, 103 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred 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: 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...