/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:35:34,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:35:34,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:35:34,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:35:34,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:35:34,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:35:34,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:35:34,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:35:34,213 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:35:34,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:35:34,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:35:34,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:35:34,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:35:34,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:35:34,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:35:34,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:35:34,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:35:34,215 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:35:34,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:35:34,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:35:34,216 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:35:34,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:35:34,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:35:34,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:35:34,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:35:34,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:35:34,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:35:34,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:35:34,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:35:34,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:35:34,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:35:34,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:35:34,672 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:35:34,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2021-02-23 22:35:34,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56de4fed2/e8d2c840cd2343bab95897e68cc12603/FLAG5003310d6 [2021-02-23 22:35:35,395 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:35:35,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2021-02-23 22:35:35,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56de4fed2/e8d2c840cd2343bab95897e68cc12603/FLAG5003310d6 [2021-02-23 22:35:35,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56de4fed2/e8d2c840cd2343bab95897e68cc12603 [2021-02-23 22:35:35,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:35:35,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:35:35,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:35,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:35:35,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:35:35,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:35" (1/1) ... [2021-02-23 22:35:35,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58facb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:35, skipping insertion in model container [2021-02-23 22:35:35,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:35" (1/1) ... [2021-02-23 22:35:35,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:35:35,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:35:35,989 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c[1571,1584] [2021-02-23 22:35:35,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:36,005 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:35:36,059 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c[1571,1584] [2021-02-23 22:35:36,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:36,083 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:35:36,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36 WrapperNode [2021-02-23 22:35:36,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:36,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:35:36,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:35:36,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:35:36,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (1/1) ... [2021-02-23 22:35:36,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (1/1) ... [2021-02-23 22:35:36,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (1/1) ... [2021-02-23 22:35:36,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (1/1) ... [2021-02-23 22:35:36,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (1/1) ... [2021-02-23 22:35:36,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (1/1) ... [2021-02-23 22:35:36,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (1/1) ... [2021-02-23 22:35:36,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:35:36,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:35:36,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:35:36,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:35:36,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (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 [2021-02-23 22:35:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:35:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:35:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:35:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2021-02-23 22:35:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-23 22:35:36,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:35:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:35:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:35:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:35:36,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:35:36,292 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2021-02-23 22:35:36,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 22:35:36,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:35:36,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:35:36,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:35:36,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 22:35:36,293 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-23 22:35:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:35:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:35:36,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:35:36,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:35:36,780 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:35:36,780 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-23 22:35:36,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:36 BoogieIcfgContainer [2021-02-23 22:35:36,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:35:36,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:35:36,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:35:36,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:35:36,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:35:35" (1/3) ... [2021-02-23 22:35:36,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf026a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:36, skipping insertion in model container [2021-02-23 22:35:36,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:36" (2/3) ... [2021-02-23 22:35:36,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf026a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:36, skipping insertion in model container [2021-02-23 22:35:36,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:36" (3/3) ... [2021-02-23 22:35:36,791 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1031.c [2021-02-23 22:35:36,798 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:35:36,802 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:35:36,821 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:35:36,845 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:35:36,845 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:35:36,845 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:35:36,846 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:35:36,846 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:35:36,846 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:35:36,846 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:35:36,846 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:35:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2021-02-23 22:35:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 22:35:36,873 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:36,874 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] [2021-02-23 22:35:36,874 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:36,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1852363101, now seen corresponding path program 1 times [2021-02-23 22:35:36,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:36,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993264767] [2021-02-23 22:35:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:37,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:37,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:37,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:37,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:35:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:37,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:37,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:37,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:35:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:37,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:37,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:37,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:37,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:37,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 22:35:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:37,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:37,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:35:37,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993264767] [2021-02-23 22:35:37,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:35:37,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:35:37,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851023040] [2021-02-23 22:35:37,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:35:37,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:35:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:35:37,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:35:37,302 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states. [2021-02-23 22:35:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:35:37,724 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2021-02-23 22:35:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:35:37,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2021-02-23 22:35:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:35:37,737 INFO L225 Difference]: With dead ends: 120 [2021-02-23 22:35:37,737 INFO L226 Difference]: Without dead ends: 62 [2021-02-23 22:35:37,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:35:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-23 22:35:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-23 22:35:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 22:35:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-02-23 22:35:37,792 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 35 [2021-02-23 22:35:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:35:37,792 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-02-23 22:35:37,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:35:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-02-23 22:35:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 22:35:37,794 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:37,795 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] [2021-02-23 22:35:37,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:35:37,795 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:37,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2024615770, now seen corresponding path program 1 times [2021-02-23 22:35:37,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:37,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739157487] [2021-02-23 22:35:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:37,862 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:37,906 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:37,960 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:35:37,960 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:35:37,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:35:38,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:35:38 BoogieIcfgContainer [2021-02-23 22:35:38,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:35:38,012 INFO L168 Benchmark]: Toolchain (without parser) took 2259.16 ms. Allocated memory is still 151.0 MB. Free memory was 128.3 MB in the beginning and 117.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:38,013 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:35:38,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.38 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:38,015 INFO L168 Benchmark]: Boogie Preprocessor took 84.19 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:38,016 INFO L168 Benchmark]: RCFGBuilder took 611.81 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 127.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:38,017 INFO L168 Benchmark]: TraceAbstraction took 1226.39 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:38,021 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 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.38 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.19 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 611.81 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 127.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1226.39 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 72]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 57, overapproximation of someBinaryArithmeticFLOAToperation at line 44, overapproximation of bitwiseAnd at line 24. Possible FailurePath: [L67] float x = 0.0f / 0.0f; [L68] CALL, EXPR round_float(x) VAL [\old(x)=2139095044] [L14] __uint32_t w; VAL [\old(x)=2139095044, x=2139095044] [L16] int exponent_less_127; VAL [\old(x)=2139095044, x=2139095044] [L19] ieee_float_shape_type gf_u; VAL [\old(x)=2139095044, gf_u={3:0}, x=2139095044] [L20] gf_u.value = (x) VAL [\old(x)=2139095044, gf_u={3:0}, x=2139095044] [L21] EXPR gf_u.word VAL [\old(x)=2139095044, gf_u={3:0}, gf_u.word=2139095048, x=2139095044] [L21] (w) = gf_u.word VAL [\old(x)=2139095044, gf_u={3:0}, gf_u.word=2139095048, w=2139095048, x=2139095044] [L24] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095048, x=2139095044] [L26] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095048, x=2139095044] [L42] COND TRUE exponent_less_127 == 128 VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095048, x=2139095044] [L44] return x + x; VAL [\old(x)=2139095044, exponent_less_127=128, w=2139095048, x=2139095044] [L68] RET, EXPR round_float(x) VAL [round_float(x)=2139095045, x=2139095044] [L68] float res = round_float(x); VAL [res=2139095045, round_float(x)=2139095045, x=2139095044] [L71] CALL, EXPR isnan_float(res) VAL [\old(x)=2139095045] [L57] return x != x; VAL [\old(x)=2139095045, \result=0, x=2139095045] [L71] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=2139095045, x=2139095044] [L71] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, res=2139095045, x=2139095044] [L72] reach_error() VAL [res=2139095045, x=2139095044] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 15 SDslu, 47 SDs, 0 SdLazy, 76 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 2584 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...