/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 03:55:44,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 03:55:44,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 03:55:44,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 03:55:44,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 03:55:44,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 03:55:44,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 03:55:44,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 03:55:44,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 03:55:44,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 03:55:44,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 03:55:44,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 03:55:44,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 03:55:44,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 03:55:44,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 03:55:44,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 03:55:44,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 03:55:44,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 03:55:44,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 03:55:44,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 03:55:44,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 03:55:44,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 03:55:44,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 03:55:44,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 03:55:44,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 03:55:44,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 03:55:44,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 03:55:44,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 03:55:44,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 03:55:44,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 03:55:44,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 03:55:44,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 03:55:44,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 03:55:44,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 03:55:44,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 03:55:44,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 03:55:44,484 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 03:55:44,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 03:55:44,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 03:55:44,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:55:44,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 03:55:44,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 03:55:44,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 03:55:44,486 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 03:55:44,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 03:55:44,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 03:55:44,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 03:55:44,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 03:55:44,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 03:55:44,915 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 03:55:44,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2021-02-24 03:55:45,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea055075/b30a60e037c2441b8db463ed465d5f4a/FLAG4cda6d5d5 [2021-02-24 03:55:45,717 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 03:55:45,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2021-02-24 03:55:45,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea055075/b30a60e037c2441b8db463ed465d5f4a/FLAG4cda6d5d5 [2021-02-24 03:55:46,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea055075/b30a60e037c2441b8db463ed465d5f4a [2021-02-24 03:55:46,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 03:55:46,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 03:55:46,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 03:55:46,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 03:55:46,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 03:55:46,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e9a8e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46, skipping insertion in model container [2021-02-24 03:55:46,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 03:55:46,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 03:55:46,378 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_0720.c[1929,1942] [2021-02-24 03:55:46,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:55:46,393 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 03:55:46,428 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_0720.c[1929,1942] [2021-02-24 03:55:46,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:55:46,453 INFO L208 MainTranslator]: Completed translation [2021-02-24 03:55:46,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46 WrapperNode [2021-02-24 03:55:46,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 03:55:46,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 03:55:46,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 03:55:46,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 03:55:46,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (1/1) ... [2021-02-24 03:55:46,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 03:55:46,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 03:55:46,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 03:55:46,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 03:55:46,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (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 [2021-02-24 03:55:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 03:55:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 03:55:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 03:55:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-24 03:55:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2021-02-24 03:55:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 03:55:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 03:55:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 03:55:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 03:55:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 03:55:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-24 03:55:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-24 03:55:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2021-02-24 03:55:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-24 03:55:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 03:55:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 03:55:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 03:55:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-24 03:55:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 03:55:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 03:55:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 03:55:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 03:55:47,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 03:55:47,375 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-24 03:55:47,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:55:47 BoogieIcfgContainer [2021-02-24 03:55:47,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 03:55:47,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 03:55:47,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 03:55:47,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 03:55:47,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:55:46" (1/3) ... [2021-02-24 03:55:47,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43212fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:55:47, skipping insertion in model container [2021-02-24 03:55:47,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:55:46" (2/3) ... [2021-02-24 03:55:47,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43212fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:55:47, skipping insertion in model container [2021-02-24 03:55:47,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:55:47" (3/3) ... [2021-02-24 03:55:47,387 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2021-02-24 03:55:47,395 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 03:55:47,402 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 03:55:47,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 03:55:47,453 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 03:55:47,453 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 03:55:47,453 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 03:55:47,453 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 03:55:47,454 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 03:55:47,454 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 03:55:47,454 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 03:55:47,454 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 03:55:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2021-02-24 03:55:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-24 03:55:47,484 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:55:47,485 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] [2021-02-24 03:55:47,486 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:55:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:55:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1576615721, now seen corresponding path program 1 times [2021-02-24 03:55:47,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:55:47,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722149640] [2021-02-24 03:55:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:55:47,586 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:55:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:47,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:47,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:47,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:47,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:47,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:55:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:47,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:47,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-24 03:55:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:47,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:47,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:47,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:47,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:47,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-02-24 03:55:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:55:47,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:55:47,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:55:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 03:55:47,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722149640] [2021-02-24 03:55:47,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:55:47,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 03:55:47,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241990914] [2021-02-24 03:55:47,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 03:55:47,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:55:47,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 03:55:48,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 03:55:48,003 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 4 states. [2021-02-24 03:55:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:55:48,364 INFO L93 Difference]: Finished difference Result 185 states and 219 transitions. [2021-02-24 03:55:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 03:55:48,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2021-02-24 03:55:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:55:48,401 INFO L225 Difference]: With dead ends: 185 [2021-02-24 03:55:48,404 INFO L226 Difference]: Without dead ends: 99 [2021-02-24 03:55:48,417 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 [2021-02-24 03:55:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-24 03:55:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-02-24 03:55:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-24 03:55:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-02-24 03:55:48,514 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 43 [2021-02-24 03:55:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:55:48,515 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-02-24 03:55:48,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 03:55:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-02-24 03:55:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-24 03:55:48,517 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:55:48,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 03:55:48,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 03:55:48,518 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:55:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:55:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1265194154, now seen corresponding path program 1 times [2021-02-24 03:55:48,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:55:48,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246740918] [2021-02-24 03:55:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:55:48,523 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:55:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:55:48,595 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:55:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:55:48,678 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:55:48,728 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 03:55:48,729 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 03:55:48,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 03:55:48,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:55:48 BoogieIcfgContainer [2021-02-24 03:55:48,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 03:55:48,761 INFO L168 Benchmark]: Toolchain (without parser) took 2696.55 ms. Allocated memory is still 158.3 MB. Free memory was 135.6 MB in the beginning and 117.8 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:48,763 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 158.3 MB. Free memory is still 134.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:55:48,765 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.97 ms. Allocated memory is still 158.3 MB. Free memory was 134.4 MB in the beginning and 123.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:48,769 INFO L168 Benchmark]: Boogie Preprocessor took 54.41 ms. Allocated memory is still 158.3 MB. Free memory was 123.2 MB in the beginning and 121.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:48,772 INFO L168 Benchmark]: RCFGBuilder took 866.60 ms. Allocated memory is still 158.3 MB. Free memory was 121.2 MB in the beginning and 128.6 MB in the end (delta: -7.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:48,772 INFO L168 Benchmark]: TraceAbstraction took 1379.54 ms. Allocated memory is still 158.3 MB. Free memory was 128.1 MB in the beginning and 117.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-02-24 03:55:48,782 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 158.3 MB. Free memory is still 134.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 374.97 ms. Allocated memory is still 158.3 MB. Free memory was 134.4 MB in the beginning and 123.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.41 ms. Allocated memory is still 158.3 MB. Free memory was 123.2 MB in the beginning and 121.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 866.60 ms. Allocated memory is still 158.3 MB. Free memory was 121.2 MB in the beginning and 128.6 MB in the end (delta: -7.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1379.54 ms. Allocated memory is still 158.3 MB. Free memory was 128.1 MB in the beginning and 117.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 98]: 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 15, overapproximation of someBinaryArithmeticFLOAToperation at line 32, overapproximation of bitwiseAnd at line 29. Possible FailurePath: [L17] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L93] float x = 0.0f / 0.0f; [L94] CALL, EXPR __ieee754_sqrtf(x) [L20] float z; [L21] __uint32_t r, hx; [L22] __int32_t ix, s, q, m, t, i; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (ix) = gf_u.word [L29] hx = ix & 0x7fffffff [L31] COND TRUE !((hx) < 0x7f800000L) [L32] return x * x + x; [L94] RET, EXPR __ieee754_sqrtf(x) [L94] float res = __ieee754_sqrtf(x); [L97] CALL, EXPR isnan_float(res) [L15] return x != x; [L97] RET, EXPR isnan_float(res) [L97] COND TRUE !isnan_float(res) [L98] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 109 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 29 SDslu, 81 SDs, 0 SdLazy, 114 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=106occurred 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...