/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_1011a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 04:46:08,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 04:46:08,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 04:46:08,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 04:46:08,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 04:46:08,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 04:46:08,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 04:46:08,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 04:46:08,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 04:46:08,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 04:46:08,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 04:46:08,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 04:46:08,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 04:46:08,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 04:46:08,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 04:46:08,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 04:46:08,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 04:46:08,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 04:46:08,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 04:46:08,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 04:46:08,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 04:46:08,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 04:46:08,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 04:46:08,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 04:46:08,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 04:46:08,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 04:46:08,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 04:46:08,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 04:46:08,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 04:46:08,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 04:46:08,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 04:46:08,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 04:46:08,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 04:46:08,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 04:46:08,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 04:46:08,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 04:46:08,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 04:46:08,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 04:46:08,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 04:46:08,388 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 04:46:08,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 04:46:08,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 04:46:08,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 04:46:08,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 04:46:08,390 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 04:46:08,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 04:46:08,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 04:46:08,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:46:08,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 04:46:08,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 04:46:08,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 04:46:08,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 04:46:08,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 04:46:08,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 04:46:08,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 04:46:08,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 04:46:08,781 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 04:46:08,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2020-11-07 04:46:08,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27ee3f660/5afdf644d4ec431997146d6ab92bfd32/FLAG7bcf98723 [2020-11-07 04:46:09,473 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 04:46:09,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2020-11-07 04:46:09,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27ee3f660/5afdf644d4ec431997146d6ab92bfd32/FLAG7bcf98723 [2020-11-07 04:46:09,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27ee3f660/5afdf644d4ec431997146d6ab92bfd32 [2020-11-07 04:46:09,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 04:46:09,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 04:46:09,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 04:46:09,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 04:46:09,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 04:46:09,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:09" (1/1) ... [2020-11-07 04:46:09,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489b8964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:09, skipping insertion in model container [2020-11-07 04:46:09,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:46:09" (1/1) ... [2020-11-07 04:46:09,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 04:46:09,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 04:46:10,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:46:10,064 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 04:46:10,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 04:46:10,103 INFO L208 MainTranslator]: Completed translation [2020-11-07 04:46:10,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10 WrapperNode [2020-11-07 04:46:10,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 04:46:10,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 04:46:10,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 04:46:10,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 04:46:10,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... [2020-11-07 04:46:10,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... [2020-11-07 04:46:10,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... [2020-11-07 04:46:10,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... [2020-11-07 04:46:10,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... [2020-11-07 04:46:10,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... [2020-11-07 04:46:10,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... [2020-11-07 04:46:10,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 04:46:10,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 04:46:10,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 04:46:10,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 04:46:10,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 04:46:10,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 04:46:10,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 04:46:10,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 04:46:10,281 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-11-07 04:46:10,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-11-07 04:46:10,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 04:46:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 04:46:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 04:46:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 04:46:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 04:46:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-07 04:46:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-11-07 04:46:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 04:46:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 04:46:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 04:46:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 04:46:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 04:46:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-11-07 04:46:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 04:46:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 04:46:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 04:46:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 04:46:10,873 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 04:46:10,873 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-07 04:46:10,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:10 BoogieIcfgContainer [2020-11-07 04:46:10,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 04:46:10,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 04:46:10,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 04:46:10,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 04:46:10,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:46:09" (1/3) ... [2020-11-07 04:46:10,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d676c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:10, skipping insertion in model container [2020-11-07 04:46:10,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:46:10" (2/3) ... [2020-11-07 04:46:10,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d676c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:46:10, skipping insertion in model container [2020-11-07 04:46:10,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:46:10" (3/3) ... [2020-11-07 04:46:10,884 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011a.c [2020-11-07 04:46:10,901 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 04:46:10,905 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 04:46:10,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 04:46:10,944 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 04:46:10,944 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 04:46:10,944 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 04:46:10,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 04:46:10,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 04:46:10,944 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 04:46:10,945 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 04:46:10,945 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 04:46:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-11-07 04:46:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 04:46:10,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:46:10,975 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] [2020-11-07 04:46:10,976 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:46:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:46:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1319003901, now seen corresponding path program 1 times [2020-11-07 04:46:10,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:46:10,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216461993] [2020-11-07 04:46:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:46:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:11,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 04:46:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:11,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 04:46:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 04:46:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 04:46:11,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216461993] [2020-11-07 04:46:11,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 04:46:11,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 04:46:11,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184310377] [2020-11-07 04:46:11,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 04:46:11,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 04:46:11,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 04:46:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 04:46:11,409 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 4 states. [2020-11-07 04:46:11,602 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 04:46:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 04:46:11,946 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-11-07 04:46:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 04:46:11,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-07 04:46:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 04:46:11,958 INFO L225 Difference]: With dead ends: 135 [2020-11-07 04:46:11,958 INFO L226 Difference]: Without dead ends: 67 [2020-11-07 04:46:11,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 04:46:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-07 04:46:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-07 04:46:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 04:46:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-11-07 04:46:12,013 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 30 [2020-11-07 04:46:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 04:46:12,014 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-11-07 04:46:12,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 04:46:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-11-07 04:46:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 04:46:12,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 04:46:12,016 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] [2020-11-07 04:46:12,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 04:46:12,017 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 04:46:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 04:46:12,018 INFO L82 PathProgramCache]: Analyzing trace with hash 309504794, now seen corresponding path program 1 times [2020-11-07 04:46:12,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 04:46:12,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364706761] [2020-11-07 04:46:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 04:46:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:46:12,065 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:46:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 04:46:12,098 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 04:46:12,143 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 04:46:12,143 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 04:46:12,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 04:46:12,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:46:12 BoogieIcfgContainer [2020-11-07 04:46:12,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 04:46:12,241 INFO L168 Benchmark]: Toolchain (without parser) took 2414.17 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 116.6 MB in the beginning and 143.3 MB in the end (delta: -26.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:12,245 INFO L168 Benchmark]: CDTParser took 1.01 ms. Allocated memory is still 158.3 MB. Free memory was 132.9 MB in the beginning and 132.8 MB in the end (delta: 128.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 04:46:12,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.00 ms. Allocated memory is still 158.3 MB. Free memory was 116.0 MB in the beginning and 133.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:12,247 INFO L168 Benchmark]: Boogie Preprocessor took 43.27 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 131.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:12,249 INFO L168 Benchmark]: RCFGBuilder took 725.97 ms. Allocated memory is still 158.3 MB. Free memory was 131.7 MB in the beginning and 122.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:12,253 INFO L168 Benchmark]: TraceAbstraction took 1361.50 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 121.6 MB in the beginning and 143.3 MB in the end (delta: -21.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. [2020-11-07 04:46:12,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.01 ms. Allocated memory is still 158.3 MB. Free memory was 132.9 MB in the beginning and 132.8 MB in the end (delta: 128.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.00 ms. Allocated memory is still 158.3 MB. Free memory was 116.0 MB in the beginning and 133.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.27 ms. Allocated memory is still 158.3 MB. Free memory was 133.4 MB in the beginning and 131.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 725.97 ms. Allocated memory is still 158.3 MB. Free memory was 131.7 MB in the beginning and 122.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1361.50 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 121.6 MB in the beginning and 143.3 MB in the end (delta: -21.7 MB). Peak memory consumption was 12.2 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 someBinaryFLOATComparisonOperation at line 51, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L47] float x = 0.0f; VAL [x=0] [L48] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L15] __uint32_t ix; VAL [\old(x)=0, x=0] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=0, gf_u={8:0}, x=0] [L18] gf_u.value = (x) VAL [\old(x)=0, gf_u={8:0}, x=0] [L19] EXPR gf_u.word VAL [\old(x)=0, gf_u={8:0}, gf_u.word=54, x=0] [L19] (ix) = gf_u.word VAL [(ix) = gf_u.word=51, \old(x)=0, gf_u={8:0}, gf_u.word=54, ix=54, x=0] [L22] ieee_float_shape_type sf_u; VAL [\old(x)=0, ix=54, sf_u={3:0}, x=0] [L23] sf_u.word = (ix & 0x7fffffff) VAL [\old(x)=0, ix=54, sf_u={3:0}, x=0] [L24] EXPR sf_u.value VAL [\old(x)=0, ix=54, sf_u={3:0}, sf_u.value=62, x=0] [L24] (x) = sf_u.value VAL [\old(x)=0, ix=54, sf_u={3:0}, sf_u.value=62, x=62] [L26] return x; VAL [\old(x)=0, \result=62, ix=54, x=62] [L48] RET, EXPR fabs_float(x) VAL [fabs_float(x)=62, x=0] [L48] float res = fabs_float(x); VAL [fabs_float(x)=62, res=62, x=0] [L51] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=62, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L51] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) VAL [res=62, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L52] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1011a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 13 SDslu, 44 SDs, 0 SdLazy, 84 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred 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, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 2059 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...