/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_1031.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-36cd7be
[2021-02-23 17:37:46,209 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-23 17:37:46,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-02-23 17:37:46,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-02-23 17:37:46,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-02-23 17:37:46,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-02-23 17:37:46,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2021-02-23 17:37:46,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-02-23 17:37:46,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
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[2021-02-23 17:37:46,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-23 17:37:46,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-23 17:37:46,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-23 17:37:46,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-23 17:37:46,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-23 17:37:46,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-23 17:37:46,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-23 17:37:46,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-02-23 17:37:46,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-02-23 17:37:46,381 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 17:37:46,405 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-23 17:37:46,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-23 17:37:46,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-23 17:37:46,410 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-23 17:37:46,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-23 17:37:46,410 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-23 17:37:46,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-23 17:37:46,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-23 17:37:46,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-23 17:37:46,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-23 17:37:46,412 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-23 17:37:46,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-23 17:37:46,413 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-23 17:37:46,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-23 17:37:46,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-23 17:37:46,414 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-23 17:37:46,414 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-23 17:37:46,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-23 17:37:46,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-23 17:37:46,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-23 17:37:46,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-23 17:37:46,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-23 17:37:46,416 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-23 17:37:46,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-23 17:37:46,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-23 17:37:46,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-23 17:37:46,861 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-23 17:37:46,862 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-23 17:37:46,863 INFO L432 ainManager$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 17:37:46,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c5554e0/301d6cb6713646abadbb2c86fc32517d/FLAGf90ea3a4d
[2021-02-23 17:37:47,545 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-23 17:37:47,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c
[2021-02-23 17:37:47,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c5554e0/301d6cb6713646abadbb2c86fc32517d/FLAGf90ea3a4d
[2021-02-23 17:37:47,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c5554e0/301d6cb6713646abadbb2c86fc32517d
[2021-02-23 17:37:47,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-23 17:37:47,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-23 17:37:47,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-23 17:37:47,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-23 17:37:47,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-23 17:37:47,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:37:47" (1/1) ...
[2021-02-23 17:37:47,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e81f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:47, skipping insertion in model container
[2021-02-23 17:37:47,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:37:47" (1/1) ...
[2021-02-23 17:37:47,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-23 17:37:47,995 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-23 17:37:48,257 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 17:37:48,266 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-23 17:37:48,277 INFO L203 MainTranslator]: Completed pre-run
[2021-02-23 17:37:48,318 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 17:37:48,321 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-23 17:37:48,346 INFO L208 MainTranslator]: Completed translation
[2021-02-23 17:37:48,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48 WrapperNode
[2021-02-23 17:37:48,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-23 17:37:48,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-23 17:37:48,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-23 17:37:48,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-23 17:37:48,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (1/1) ...
[2021-02-23 17:37:48,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (1/1) ...
[2021-02-23 17:37:48,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (1/1) ...
[2021-02-23 17:37:48,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (1/1) ...
[2021-02-23 17:37:48,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (1/1) ...
[2021-02-23 17:37:48,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (1/1) ...
[2021-02-23 17:37:48,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (1/1) ...
[2021-02-23 17:37:48,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-23 17:37:48,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-23 17:37:48,435 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-23 17:37:48,435 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-23 17:37:48,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (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 17:37:48,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-23 17:37:48,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-23 17:37:48,544 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-23 17:37:48,544 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float
[2021-02-23 17:37:48,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float
[2021-02-23 17:37:48,544 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-23 17:37:48,544 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-23 17:37:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-23 17:37:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-23 17:37:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-23 17:37:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure round_float
[2021-02-23 17:37:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~real
[2021-02-23 17:37:48,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-23 17:37:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-23 17:37:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-23 17:37:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~real
[2021-02-23 17:37:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float
[2021-02-23 17:37:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-23 17:37:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-23 17:37:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-23 17:37:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-23 17:37:48,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-23 17:37:48,930 INFO L299 CfgBuilder]: Removed 4 assume(true) statements.
[2021-02-23 17:37:48,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:37:48 BoogieIcfgContainer
[2021-02-23 17:37:48,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-23 17:37:48,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-23 17:37:48,934 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-23 17:37:48,938 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-23 17:37:48,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:37:47" (1/3) ...
[2021-02-23 17:37:48,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@916dace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:37:48, skipping insertion in model container
[2021-02-23 17:37:48,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:37:48" (2/3) ...
[2021-02-23 17:37:48,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@916dace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:37:48, skipping insertion in model container
[2021-02-23 17:37:48,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:37:48" (3/3) ...
[2021-02-23 17:37:48,941 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1031.c
[2021-02-23 17:37:48,949 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-23 17:37:48,954 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-23 17:37:48,974 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-23 17:37:49,001 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-23 17:37:49,002 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-23 17:37:49,002 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-23 17:37:49,002 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-23 17:37:49,002 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-23 17:37:49,002 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-23 17:37:49,003 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-23 17:37:49,003 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-23 17:37:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states.
[2021-02-23 17:37:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2021-02-23 17:37:49,064 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-23 17:37:49,065 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 17:37:49,066 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-23 17:37:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-23 17:37:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1852363101, now seen corresponding path program 1 times
[2021-02-23 17:37:49,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-23 17:37:49,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665071632]
[2021-02-23 17:37:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-23 17:37:49,172 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-23 17:37:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-23 17:37:49,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 17:37:49,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 17:37:49,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 17:37:49,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 17:37:49,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-23 17:37:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-23 17:37:49,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 17:37:49,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 17:37:49,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13
[2021-02-23 17:37:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-23 17:37:49,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 17:37:49,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 17:37:49,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 17:37:49,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 17:37:49,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26
[2021-02-23 17:37:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-23 17:37:49,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-23 17:37:49,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-23 17:37:49,614 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 17:37:49,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665071632]
[2021-02-23 17:37:49,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-23 17:37:49,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-02-23 17:37:49,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466589090]
[2021-02-23 17:37:49,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states
[2021-02-23 17:37:49,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-23 17:37:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-02-23 17:37:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-02-23 17:37:49,642 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 4 states.
[2021-02-23 17:37:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-23 17:37:49,872 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions.
[2021-02-23 17:37:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2021-02-23 17:37:49,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35
[2021-02-23 17:37:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-23 17:37:49,886 INFO L225 Difference]: With dead ends: 120
[2021-02-23 17:37:49,886 INFO L226 Difference]: Without dead ends: 62
[2021-02-23 17:37:49,890 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 17:37:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2021-02-23 17:37:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62.
[2021-02-23 17:37:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2021-02-23 17:37:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions.
[2021-02-23 17:37:49,945 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 35
[2021-02-23 17:37:49,946 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-23 17:37:49,946 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions.
[2021-02-23 17:37:49,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2021-02-23 17:37:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions.
[2021-02-23 17:37:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2021-02-23 17:37:49,949 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-23 17:37:49,949 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 17:37:49,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-23 17:37:49,950 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-23 17:37:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-23 17:37:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2024615770, now seen corresponding path program 1 times
[2021-02-23 17:37:49,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-23 17:37:49,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194254096]
[2021-02-23 17:37:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-23 17:37:49,955 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-23 17:37:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-23 17:37:50,044 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-23 17:37:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-23 17:37:50,142 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-23 17:37:50,197 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-23 17:37:50,198 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-23 17:37:50,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-23 17:37:50,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:37:50 BoogieIcfgContainer
[2021-02-23 17:37:50,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-23 17:37:50,225 INFO L168 Benchmark]: Toolchain (without parser) took 2287.10 ms. Allocated memory is still 154.1 MB. Free memory was 130.6 MB in the beginning and 71.0 MB in the end (delta: 59.6 MB). Peak memory consumption was 60.6 MB. Max. memory is 8.0 GB.
[2021-02-23 17:37:50,228 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 154.1 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-23 17:37:50,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.70 ms. Allocated memory is still 154.1 MB. Free memory was 129.6 MB in the beginning and 119.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
[2021-02-23 17:37:50,234 INFO L168 Benchmark]: Boogie Preprocessor took 83.96 ms. Allocated memory is still 154.1 MB. Free memory was 119.3 MB in the beginning and 117.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-23 17:37:50,235 INFO L168 Benchmark]: RCFGBuilder took 498.47 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 132.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB.
[2021-02-23 17:37:50,236 INFO L168 Benchmark]: TraceAbstraction took 1289.12 ms. Allocated memory is still 154.1 MB. Free memory was 132.3 MB in the beginning and 71.0 MB in the end (delta: 61.3 MB). Peak memory consumption was 60.8 MB. Max. memory is 8.0 GB.
[2021-02-23 17:37:50,246 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.25 ms. Allocated memory is still 154.1 MB. Free memory is still 130.1 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 391.70 ms. Allocated memory is still 154.1 MB. Free memory was 129.6 MB in the beginning and 119.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 83.96 ms. Allocated memory is still 154.1 MB. Free memory was 119.3 MB in the beginning and 117.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 498.47 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 132.3 MB in the end (delta: -14.6 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 1289.12 ms. Allocated memory is still 154.1 MB. Free memory was 132.3 MB in the beginning and 71.0 MB in the end (delta: 61.3 MB). Peak memory consumption was 60.8 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)
[L14] __uint32_t w;
[L16] int exponent_less_127;
[L19] ieee_float_shape_type gf_u;
[L20] gf_u.value = (x)
[L21] EXPR gf_u.word
[L21] (w) = gf_u.word
[L24] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127
[L26] COND FALSE !(exponent_less_127 < 23)
[L42] COND TRUE exponent_less_127 == 128
[L44] return x + x;
[L68] RET, EXPR round_float(x)
[L68] float res = round_float(x);
[L71] CALL, EXPR isnan_float(res)
[L57] return x != x;
[L71] RET, EXPR isnan_float(res)
[L71] COND TRUE !isnan_float(res)
[L72] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, 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: 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...