/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_1381.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:32:17,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:32:17,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:32:17,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:32:17,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:32:17,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:32:17,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:32:17,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:32:17,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:32:17,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:32:17,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:32:17,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:32:17,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:32:17,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:32:17,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:32:17,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:32:17,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:32:17,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:32:17,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:32:17,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:32:17,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:32:17,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:32:17,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:32:17,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:32:17,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:32:17,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:32:17,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:32:17,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:32:17,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:32:17,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:32:17,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:32:17,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:32:17,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:32:17,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:32:17,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:32:17,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:32:17,630 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:32:17,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:32:17,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:32:17,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:32:17,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:32:17,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:32:17,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:32:17,632 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:32:17,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:32:18,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:32:18,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:32:18,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:32:18,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:32:18,067 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:32:18,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-22 01:32:18,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd3fdd9b/161e732d08f14719b29e2cb9f54a9674/FLAG0e7b42970 [2021-02-22 01:32:18,725 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:32:18,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-22 01:32:18,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd3fdd9b/161e732d08f14719b29e2cb9f54a9674/FLAG0e7b42970 [2021-02-22 01:32:19,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd3fdd9b/161e732d08f14719b29e2cb9f54a9674 [2021-02-22 01:32:19,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:32:19,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:32:19,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:32:19,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:32:19,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:32:19,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253351ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19, skipping insertion in model container [2021-02-22 01:32:19,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:32:19,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:32:19,338 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_1381.c[1242,1255] [2021-02-22 01:32:19,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:32:19,350 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:32:19,372 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_1381.c[1242,1255] [2021-02-22 01:32:19,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:32:19,390 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:32:19,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19 WrapperNode [2021-02-22 01:32:19,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:32:19,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:32:19,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:32:19,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:32:19,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (1/1) ... [2021-02-22 01:32:19,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:32:19,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:32:19,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:32:19,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:32:19,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (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 [2021-02-22 01:32:19,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:32:19,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:32:19,534 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:32:19,534 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2021-02-22 01:32:19,534 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-22 01:32:19,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:32:19,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:32:19,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:32:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:32:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:32:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-22 01:32:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2021-02-22 01:32:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-22 01:32:19,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:32:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:32:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:32:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-22 01:32:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-22 01:32:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:32:19,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:32:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:32:19,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:32:19,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:32:19,923 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-22 01:32:19,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:32:19 BoogieIcfgContainer [2021-02-22 01:32:19,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:32:19,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:32:19,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:32:19,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:32:19,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:32:19" (1/3) ... [2021-02-22 01:32:19,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:32:19, skipping insertion in model container [2021-02-22 01:32:19,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:32:19" (2/3) ... [2021-02-22 01:32:19,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:32:19, skipping insertion in model container [2021-02-22 01:32:19,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:32:19" (3/3) ... [2021-02-22 01:32:19,968 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2021-02-22 01:32:19,990 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:32:19,994 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:32:20,011 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:32:20,031 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:32:20,032 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:32:20,032 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:32:20,032 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:32:20,032 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:32:20,032 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:32:20,032 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:32:20,033 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:32:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2021-02-22 01:32:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-22 01:32:20,059 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:32:20,060 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] [2021-02-22 01:32:20,060 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:32:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:32:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2004470524, now seen corresponding path program 1 times [2021-02-22 01:32:20,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:32:20,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967425820] [2021-02-22 01:32:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:32:20,142 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:32:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:20,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:20,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:20,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:20,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:20,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:32:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:20,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:20,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:20,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 01:32:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:20,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:20,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:20,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:20,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:20,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:32:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:32:20,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:32:20,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:32:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:32:20,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967425820] [2021-02-22 01:32:20,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:32:20,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 01:32:20,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318778737] [2021-02-22 01:32:20,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 01:32:20,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:32:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 01:32:20,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 01:32:20,488 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 4 states. [2021-02-22 01:32:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:32:20,681 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2021-02-22 01:32:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 01:32:20,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2021-02-22 01:32:20,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:32:20,693 INFO L225 Difference]: With dead ends: 111 [2021-02-22 01:32:20,693 INFO L226 Difference]: Without dead ends: 59 [2021-02-22 01:32:20,697 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 [2021-02-22 01:32:20,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-02-22 01:32:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-02-22 01:32:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-22 01:32:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 58 transitions. [2021-02-22 01:32:20,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 58 transitions. Word has length 37 [2021-02-22 01:32:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:32:20,750 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 58 transitions. [2021-02-22 01:32:20,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 01:32:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 58 transitions. [2021-02-22 01:32:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-22 01:32:20,753 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:32:20,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:32:20,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:32:20,755 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:32:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:32:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 264402084, now seen corresponding path program 1 times [2021-02-22 01:32:20,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:32:20,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223421337] [2021-02-22 01:32:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:32:20,765 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:32:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:32:20,861 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:32:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:32:20,903 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:32:20,940 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:32:20,940 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:32:20,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:32:20,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:32:20 BoogieIcfgContainer [2021-02-22 01:32:20,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:32:20,962 INFO L168 Benchmark]: Toolchain (without parser) took 1892.84 ms. Allocated memory is still 157.3 MB. Free memory was 134.0 MB in the beginning and 80.5 MB in the end (delta: 53.6 MB). Peak memory consumption was 53.6 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:20,963 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 157.3 MB. Free memory is still 132.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:32:20,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.33 ms. Allocated memory is still 157.3 MB. Free memory was 133.0 MB in the beginning and 122.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:20,965 INFO L168 Benchmark]: Boogie Preprocessor took 44.33 ms. Allocated memory is still 157.3 MB. Free memory was 122.9 MB in the beginning and 121.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:20,966 INFO L168 Benchmark]: RCFGBuilder took 488.11 ms. Allocated memory is still 157.3 MB. Free memory was 121.3 MB in the beginning and 101.7 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:20,967 INFO L168 Benchmark]: TraceAbstraction took 1004.79 ms. Allocated memory is still 157.3 MB. Free memory was 140.8 MB in the beginning and 80.5 MB in the end (delta: 60.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:32:20,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 157.3 MB. Free memory is still 132.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.33 ms. Allocated memory is still 157.3 MB. Free memory was 133.0 MB in the beginning and 122.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.33 ms. Allocated memory is still 157.3 MB. Free memory was 122.9 MB in the beginning and 121.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 488.11 ms. Allocated memory is still 157.3 MB. Free memory was 121.3 MB in the beginning and 101.7 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1004.79 ms. Allocated memory is still 157.3 MB. Free memory was 140.8 MB in the beginning and 80.5 MB in the end (delta: 60.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 51]: 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 35, overapproximation of bitwiseOr at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L45] float x = 0.0f / 0.0f; [L46] float y = __VERIFIER_nondet_float(); [L47] CALL, EXPR copysign_float(x, y) [L15] __uint32_t ix, iy; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (ix) = gf_u.word [L22] ieee_float_shape_type gf_u; [L23] gf_u.value = (y) [L24] EXPR gf_u.word [L24] (iy) = gf_u.word [L27] ieee_float_shape_type sf_u; [L28] sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000)) [L29] EXPR sf_u.value [L29] (x) = sf_u.value [L31] return x; [L47] RET, EXPR copysign_float(x, y) [L47] float res = copysign_float(x, y); [L50] CALL, EXPR isnan_float(res) [L35] return x != x; [L50] RET, EXPR isnan_float(res) [L50] COND TRUE !isnan_float(res) [L51] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 32 SDs, 0 SdLazy, 69 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s 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=66occurred 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...