/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:20:17,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:20:17,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:20:17,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:20:17,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:20:17,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:20:17,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:20:17,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:20:17,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:20:17,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:20:17,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:20:17,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:20:17,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:20:17,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:20:17,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:20:17,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:20:17,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:20:17,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:20:17,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:20:17,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:20:17,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:20:17,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:20:17,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:20:17,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:20:17,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:20:17,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:20:17,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:20:17,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:20:17,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:20:17,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:20:17,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:20:17,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:20:17,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:20:17,490 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:20:17,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:20:17,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:20:17,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:20:17,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:20:17,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:20:17,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:20:17,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:20:17,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:20:17,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:20:17,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:20:17,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:20:17,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:20:17,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:20:17,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:20:17,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:20:17,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:20:17,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:20:17,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:20:17,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:20:17,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:20:17,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:20:17,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:20:17,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:20:17,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:20:17,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:20:17,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:20:17,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:20:17,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:20:17,937 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:20:17,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2021-02-19 17:20:18,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb869c19e/f4b90c1aac0e4650b0e1beca91cfdcf8/FLAG05aa1c08c [2021-02-19 17:20:18,601 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:20:18,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1032a.c [2021-02-19 17:20:18,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb869c19e/f4b90c1aac0e4650b0e1beca91cfdcf8/FLAG05aa1c08c [2021-02-19 17:20:18,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb869c19e/f4b90c1aac0e4650b0e1beca91cfdcf8 [2021-02-19 17:20:18,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:20:18,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:20:18,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:20:18,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:20:18,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:20:18,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:20:18" (1/1) ... [2021-02-19 17:20:18,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c4137e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:18, skipping insertion in model container [2021-02-19 17:20:18,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:20:18" (1/1) ... [2021-02-19 17:20:18,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:20:18,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:20:19,260 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_1032a.c[1751,1764] [2021-02-19 17:20:19,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:20:19,280 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:20:19,319 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_1032a.c[1751,1764] [2021-02-19 17:20:19,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:20:19,337 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:20:19,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19 WrapperNode [2021-02-19 17:20:19,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:20:19,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:20:19,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:20:19,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:20:19,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (1/1) ... [2021-02-19 17:20:19,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (1/1) ... [2021-02-19 17:20:19,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (1/1) ... [2021-02-19 17:20:19,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (1/1) ... [2021-02-19 17:20:19,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (1/1) ... [2021-02-19 17:20:19,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (1/1) ... [2021-02-19 17:20:19,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (1/1) ... [2021-02-19 17:20:19,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:20:19,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:20:19,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:20:19,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:20:19,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (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 [2021-02-19 17:20:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:20:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:20:19,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:20:19,549 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2021-02-19 17:20:19,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-19 17:20:19,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:20:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:20:19,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:20:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:20:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:20:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-19 17:20:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2021-02-19 17:20:19,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-19 17:20:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:20:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:20:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:20:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-19 17:20:19,551 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-19 17:20:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:20:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:20:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:20:19,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:20:19,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:20:19,958 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-19 17:20:19,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:20:19 BoogieIcfgContainer [2021-02-19 17:20:19,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:20:19,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:20:19,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:20:19,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:20:19,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:20:18" (1/3) ... [2021-02-19 17:20:19,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608c903f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:20:19, skipping insertion in model container [2021-02-19 17:20:19,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:20:19" (2/3) ... [2021-02-19 17:20:19,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608c903f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:20:19, skipping insertion in model container [2021-02-19 17:20:19,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:20:19" (3/3) ... [2021-02-19 17:20:19,973 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032a.c [2021-02-19 17:20:19,980 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:20:19,985 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:20:20,006 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:20:20,048 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:20:20,048 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:20:20,048 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:20:20,049 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:20:20,049 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:20:20,049 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:20:20,049 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:20:20,049 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:20:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-19 17:20:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:20:20,083 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:20,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:20,084 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1895925948, now seen corresponding path program 1 times [2021-02-19 17:20:20,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:20,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18696071] [2021-02-19 17:20:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:20,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:20,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:20,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:20,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:20,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:20:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:20,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:20,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:20,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:20:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:20,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:20,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:20,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:20:20,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:20:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:20,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18696071] [2021-02-19 17:20:20,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:20:20,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:20:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717393817] [2021-02-19 17:20:20,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:20:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:20:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:20:20,602 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2021-02-19 17:20:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:20,762 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-02-19 17:20:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:20:20,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-19 17:20:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:20,774 INFO L225 Difference]: With dead ends: 68 [2021-02-19 17:20:20,774 INFO L226 Difference]: Without dead ends: 34 [2021-02-19 17:20:20,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:20:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-19 17:20:20,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-19 17:20:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-19 17:20:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-02-19 17:20:20,824 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-02-19 17:20:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:20,825 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-02-19 17:20:20,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:20:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-02-19 17:20:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:20:20,826 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:20:20,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:20,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:20:20,827 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:20:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:20,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1953077347, now seen corresponding path program 1 times [2021-02-19 17:20:20,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:20,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933391250] [2021-02-19 17:20:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:20:20,926 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:20:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:20:20,976 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:20:21,006 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-19 17:20:21,006 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-19 17:20:21,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:20:21,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:20:21 BoogieIcfgContainer [2021-02-19 17:20:21,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:20:21,045 INFO L168 Benchmark]: Toolchain (without parser) took 2095.38 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 142.0 MB in the beginning and 160.0 MB in the end (delta: -18.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:21,046 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 163.6 MB. Free memory is still 134.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:20:21,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.41 ms. Allocated memory is still 163.6 MB. Free memory was 140.9 MB in the beginning and 130.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:21,048 INFO L168 Benchmark]: Boogie Preprocessor took 104.12 ms. Allocated memory is still 163.6 MB. Free memory was 130.6 MB in the beginning and 146.8 MB in the end (delta: -16.2 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:21,049 INFO L168 Benchmark]: RCFGBuilder took 516.10 ms. Allocated memory is still 163.6 MB. Free memory was 146.8 MB in the beginning and 128.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:21,050 INFO L168 Benchmark]: TraceAbstraction took 1080.13 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 127.9 MB in the beginning and 160.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. [2021-02-19 17:20:21,054 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 163.6 MB. Free memory is still 134.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 375.41 ms. Allocated memory is still 163.6 MB. Free memory was 140.9 MB in the beginning and 130.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 104.12 ms. Allocated memory is still 163.6 MB. Free memory was 130.6 MB in the beginning and 146.8 MB in the end (delta: -16.2 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 516.10 ms. Allocated memory is still 163.6 MB. Free memory was 146.8 MB in the beginning and 128.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1080.13 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 127.9 MB in the beginning and 160.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 82]: 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 81, overapproximation of bitwiseAnd at line 25, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L77] float x = 0.0f; VAL [x=0] [L78] CALL, EXPR round_float(x) VAL [\old(x)=0] [L15] __uint32_t w; [L17] int exponent_less_127; VAL [\old(x)=0, x=0] [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (w) = gf_u.word [L25] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=0, exponent_less_127=128, w=2139095046, x=0] [L27] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=0, exponent_less_127=128, w=2139095046, x=0] [L43] COND TRUE exponent_less_127 == 128 [L45] return x + x; VAL [\old(x)=0, exponent_less_127=128, w=2139095046, x=0] [L78] RET, EXPR round_float(x) VAL [round_float(x)=2139095044, x=0] [L78] float res = round_float(x); [L81] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=2139095044, res == 0.0f && __signbit_float(res) == 0=0, x=0] [L81] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L82] reach_error() VAL [res=2139095044, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 6 SDslu, 35 SDs, 0 SdLazy, 40 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 1003 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...